regern c_src

[nit.git] / c_src / nit__abstract_compiler.sep.5.c

diff --git a/c_src/nit__abstract_compiler.sep.5.c b/c_src/nit__abstract_compiler.sep.5.c
index d592257..4dae84f 100644 (file)
--- a/c_src/nit__abstract_compiler.sep.5.c
+++ b/c_src/nit__abstract_compiler.sep.5.c
@@ -1,860 +1,1385 @@
 #include "nit__abstract_compiler.sep.0.h"
-/* method abstract_compiler#AForExpr#stmt for (self: AForExpr, AbstractCompilerVisitor) */
-void nit__abstract_compiler___AForExpr___AExpr__stmt(val* self, val* p0) {
+/* method abstract_compiler#AIfExpr#expr for (self: AIfExpr, AbstractCompilerVisitor): nullable RuntimeVariable */
+val* nit__abstract_compiler___AIfExpr___AExpr__expr(val* self, val* p0) {
+val* var /* : nullable RuntimeVariable */;
 val* var_v /* var v: AbstractCompilerVisitor */;
-val* var /* : AExpr */;
-val* var2 /* : AExpr */;
-val* var3 /* : null */;
+val* var1 /* : nullable MType */;
+val* var3 /* : nullable MType */;
 val* var4 /* : RuntimeVariable */;
-val* var_cl /* var cl: RuntimeVariable */;
-val* var5 /* : nullable CallSite */;
-val* var7 /* : nullable CallSite */;
-val* var_it_meth /* var it_meth: nullable CallSite */;
-val* var8 /* : null */;
-short int var9 /* : Bool */;
-short int var10 /* : Bool */;
-val* var_other /* var other: nullable Object */;
-short int var12 /* : Bool */;
-short int var13 /* : Bool */;
-val* var14 /* : Array[RuntimeVariable] */;
-long var15 /* : Int */;
-val* var_ /* var : Array[RuntimeVariable] */;
-val* var16 /* : nullable RuntimeVariable */;
-val* var_it /* var it: nullable RuntimeVariable */;
-val* var17 /* : null */;
-short int var18 /* : Bool */;
-short int var19 /* : Bool */;
-short int var21 /* : Bool */;
-short int var22 /* : Bool */;
+val* var_res /* var res: RuntimeVariable */;
+val* var5 /* : AExpr */;
+val* var7 /* : AExpr */;
+val* var8 /* : RuntimeVariable */;
+val* var_cond /* var cond: RuntimeVariable */;
+val* var9 /* : NativeArray[String] */;
 static val* varonce;
-val* var23 /* : String */;
-char* var24 /* : NativeString */;
-long var25 /* : Int */;
-val* var26 /* : FlatString */;
-val* var27 /* : nullable CallSite */;
-val* var29 /* : nullable CallSite */;
-val* var_isok_meth /* var isok_meth: nullable CallSite */;
-val* var30 /* : null */;
-short int var31 /* : Bool */;
-short int var32 /* : Bool */;
-short int var34 /* : Bool */;
-short int var35 /* : Bool */;
-val* var36 /* : Array[RuntimeVariable] */;
-long var37 /* : Int */;
-val* var_38 /* var : Array[RuntimeVariable] */;
-val* var39 /* : nullable RuntimeVariable */;
-val* var_ok /* var ok: nullable RuntimeVariable */;
-val* var40 /* : null */;
-short int var41 /* : Bool */;
-short int var42 /* : Bool */;
-short int var44 /* : Bool */;
-short int var45 /* : Bool */;
-static val* varonce46;
-val* var47 /* : String */;
-char* var48 /* : NativeString */;
-long var49 /* : Int */;
-val* var50 /* : FlatString */;
-static val* varonce51;
-val* var52 /* : String */;
-char* var53 /* : NativeString */;
-long var54 /* : Int */;
-val* var55 /* : FlatString */;
-val* var56 /* : Array[Object] */;
-long var57 /* : Int */;
-val* var58 /* : NativeArray[Object] */;
-val* var59 /* : String */;
-val* var60 /* : nullable Array[Variable] */;
-val* var62 /* : nullable Array[Variable] */;
-long var63 /* : Int */;
-long var65 /* : Int */;
-long var66 /* : Int */;
-short int var67 /* : Bool */;
-short int var69 /* : Bool */;
-val* var70 /* : nullable CallSite */;
-val* var72 /* : nullable CallSite */;
-val* var_item_meth /* var item_meth: nullable CallSite */;
-val* var73 /* : null */;
-short int var74 /* : Bool */;
-short int var75 /* : Bool */;
-short int var77 /* : Bool */;
-short int var78 /* : Bool */;
-val* var79 /* : Array[RuntimeVariable] */;
-long var80 /* : Int */;
-val* var_81 /* var : Array[RuntimeVariable] */;
-val* var82 /* : nullable RuntimeVariable */;
-val* var_i /* var i: nullable RuntimeVariable */;
-val* var83 /* : null */;
-short int var84 /* : Bool */;
-short int var85 /* : Bool */;
-short int var87 /* : Bool */;
-short int var88 /* : Bool */;
-val* var89 /* : nullable Array[Variable] */;
-val* var91 /* : nullable Array[Variable] */;
-val* var92 /* : nullable Object */;
-val* var93 /* : RuntimeVariable */;
-val* var94 /* : nullable Array[Variable] */;
-val* var96 /* : nullable Array[Variable] */;
-long var97 /* : Int */;
-long var99 /* : Int */;
-long var100 /* : Int */;
-short int var101 /* : Bool */;
-short int var103 /* : Bool */;
-val* var104 /* : nullable CallSite */;
-val* var106 /* : nullable CallSite */;
-val* var_key_meth /* var key_meth: nullable CallSite */;
-val* var107 /* : null */;
-short int var108 /* : Bool */;
-short int var109 /* : Bool */;
-short int var111 /* : Bool */;
-short int var112 /* : Bool */;
-val* var113 /* : Array[RuntimeVariable] */;
-long var114 /* : Int */;
-val* var_115 /* var : Array[RuntimeVariable] */;
-val* var116 /* : nullable RuntimeVariable */;
-val* var_i117 /* var i: nullable RuntimeVariable */;
-val* var118 /* : null */;
-short int var119 /* : Bool */;
-short int var120 /* : Bool */;
-short int var122 /* : Bool */;
-short int var123 /* : Bool */;
-val* var124 /* : nullable Array[Variable] */;
-val* var126 /* : nullable Array[Variable] */;
-long var127 /* : Int */;
-val* var128 /* : nullable Object */;
-val* var129 /* : RuntimeVariable */;
-val* var130 /* : nullable CallSite */;
-val* var132 /* : nullable CallSite */;
-val* var_item_meth133 /* var item_meth: nullable CallSite */;
-val* var134 /* : null */;
-short int var135 /* : Bool */;
-short int var136 /* : Bool */;
-short int var138 /* : Bool */;
-short int var139 /* : Bool */;
-val* var140 /* : Array[RuntimeVariable] */;
-long var141 /* : Int */;
-val* var_142 /* var : Array[RuntimeVariable] */;
-val* var143 /* : nullable RuntimeVariable */;
-val* var144 /* : null */;
-short int var145 /* : Bool */;
-short int var146 /* : Bool */;
-short int var148 /* : Bool */;
-short int var149 /* : Bool */;
-val* var150 /* : nullable Array[Variable] */;
-val* var152 /* : nullable Array[Variable] */;
-long var153 /* : Int */;
-val* var154 /* : nullable Object */;
-val* var155 /* : RuntimeVariable */;
-val* var156 /* : nullable AExpr */;
-val* var158 /* : nullable AExpr */;
-val* var159 /* : nullable EscapeMark */;
-val* var161 /* : nullable EscapeMark */;
-val* var162 /* : nullable CallSite */;
-val* var164 /* : nullable CallSite */;
-val* var_next_meth /* var next_meth: nullable CallSite */;
-val* var165 /* : null */;
-short int var166 /* : Bool */;
-short int var167 /* : Bool */;
-short int var169 /* : Bool */;
-short int var170 /* : Bool */;
-val* var171 /* : Array[RuntimeVariable] */;
-long var172 /* : Int */;
-val* var_173 /* var : Array[RuntimeVariable] */;
-val* var174 /* : nullable RuntimeVariable */;
-static val* varonce175;
-val* var176 /* : String */;
-char* var177 /* : NativeString */;
-long var178 /* : Int */;
-val* var179 /* : FlatString */;
-val* var180 /* : nullable EscapeMark */;
-val* var182 /* : nullable EscapeMark */;
-val* var183 /* : nullable CallSite */;
-val* var185 /* : nullable CallSite */;
-val* var_method_finish /* var method_finish: nullable CallSite */;
-val* var186 /* : null */;
-short int var187 /* : Bool */;
-short int var188 /* : Bool */;
-short int var190 /* : Bool */;
-short int var191 /* : Bool */;
-val* var192 /* : Array[RuntimeVariable] */;
-long var193 /* : Int */;
-val* var_194 /* var : Array[RuntimeVariable] */;
-val* var195 /* : nullable RuntimeVariable */;
+static val* varonce10;
+val* var11 /* : String */;
+char* var12 /* : NativeString */;
+val* var13 /* : FlatString */;
+static val* varonce14;
+val* var15 /* : String */;
+char* var16 /* : NativeString */;
+val* var17 /* : FlatString */;
+val* var18 /* : String */;
+val* var19 /* : String */;
+val* var20 /* : nullable AExpr */;
+val* var22 /* : nullable AExpr */;
+val* var23 /* : RuntimeVariable */;
+static val* varonce24;
+val* var25 /* : String */;
+char* var26 /* : NativeString */;
+val* var27 /* : FlatString */;
+val* var28 /* : nullable AExpr */;
+val* var30 /* : nullable AExpr */;
+val* var31 /* : RuntimeVariable */;
+static val* varonce32;
+val* var33 /* : String */;
+char* var34 /* : NativeString */;
+val* var35 /* : FlatString */;
 var_v = p0;
 {
-{ /* Inline parser_nodes#AForExpr#n_expr (self) on <self:AForExpr> */
-var2 = self->attrs[COLOR_nit__parser_nodes__AForExpr___n_expr].val; /* _n_expr on <self:AForExpr> */
-if (unlikely(var2 == NULL)) {
-PRINT_ERROR("Runtime error: %s", "Uninitialized attribute _n_expr");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__parser_nodes, 1738);
-show_backtrace(1);
+{ /* Inline typing#AExpr#mtype (self) on <self:AIfExpr> */
+var3 = self->attrs[COLOR_nit__typing__AExpr___mtype].val; /* _mtype on <self:AIfExpr> */
+var1 = var3;
+RET_LABEL2:(void)0;
 }
-var = var2;
-RET_LABEL1:(void)0;
 }
+if (unlikely(var1 == NULL)) {
+PRINT_ERROR("Runtime error: %s", "Cast failed");
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 2702);
+fatal_exit(1);
 }
-var3 = NULL;
 {
-var4 = nit___nit__AbstractCompilerVisitor___expr(var_v, var, var3);
+var4 = nit___nit__AbstractCompilerVisitor___new_var(var_v, var1);
 }
-var_cl = var4;
+var_res = var4;
 {
-{ /* Inline typing#AForExpr#method_iterator (self) on <self:AForExpr> */
-var7 = self->attrs[COLOR_nit__typing__AForExpr___method_iterator].val; /* _method_iterator on <self:AForExpr> */
+{ /* Inline parser_nodes#AIfExpr#n_expr (self) on <self:AIfExpr> */
+var7 = self->attrs[COLOR_nit__parser_nodes__AIfExpr___n_expr].val; /* _n_expr on <self:AIfExpr> */
+if (unlikely(var7 == NULL)) {
+PRINT_ERROR("Runtime error: %s", "Uninitialized attribute _n_expr");
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__parser_nodes, 1857);
+fatal_exit(1);
+}
 var5 = var7;
 RET_LABEL6:(void)0;
 }
 }
-var_it_meth = var5;
-var8 = NULL;
-if (var_it_meth == NULL) {
-var9 = 0; /* is null */
-} else {
-var9 = 1; /* arg is null and recv is not */
-}
-if (0) {
-{ /* Inline kernel#Object#!= (var_it_meth,var8) on <var_it_meth:nullable CallSite> */
-var_other = var8;
 {
-var12 = ((short int (*)(val* self, val* p0))(var_it_meth->class->vft[COLOR_standard__kernel__Object___61d_61d]))(var_it_meth, var_other) /* == on <var_it_meth:nullable CallSite(CallSite)>*/;
+var8 = nit___nit__AbstractCompilerVisitor___expr_bool(var_v, var5);
 }
-var13 = !var12;
-var10 = var13;
-goto RET_LABEL11;
-RET_LABEL11:(void)0;
+var_cond = var8;
+if (unlikely(varonce==NULL)) {
+var9 = NEW_standard__NativeArray(3l, &type_standard__NativeArray__standard__String);
+if (likely(varonce10!=NULL)) {
+var11 = varonce10;
+} else {
+var12 = "if (";
+var13 = standard___standard__NativeString___to_s_with_length(var12, 4l);
+var11 = var13;
+varonce10 = var11;
 }
-var9 = var10;
+((struct instance_standard__NativeArray*)var9)->values[0]=var11;
+if (likely(varonce14!=NULL)) {
+var15 = varonce14;
+} else {
+var16 = "){";
+var17 = standard___standard__NativeString___to_s_with_length(var16, 2l);
+var15 = var17;
+varonce14 = var15;
 }
-if (unlikely(!var9)) {
-PRINT_ERROR("Runtime error: %s", "Assert failed");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 2563);
-show_backtrace(1);
+((struct instance_standard__NativeArray*)var9)->values[2]=var15;
+} else {
+var9 = varonce;
+varonce = NULL;
 }
-var14 = NEW_standard__Array(&type_standard__Array__nit__RuntimeVariable);
-var15 = 1;
 {
-standard___standard__Array___with_capacity(var14, var15); /* Direct call array#Array#with_capacity on <var14:Array[RuntimeVariable]>*/
+var18 = ((val*(*)(val* self))(var_cond->class->vft[COLOR_standard__string__Object__to_s]))(var_cond); /* to_s on <var_cond:RuntimeVariable>*/
 }
-var_ = var14;
+((struct instance_standard__NativeArray*)var9)->values[1]=var18;
 {
-standard___standard__AbstractArray___standard__abstract_collection__Sequence__push(var_, var_cl); /* Direct call array#AbstractArray#push on <var_:Array[RuntimeVariable]>*/
+var19 = ((val*(*)(val* self))(var9->class->vft[COLOR_standard__string__NativeArray__native_to_s]))(var9); /* native_to_s on <var9:NativeArray[String]>*/
 }
+varonce = var9;
 {
-var16 = ((val* (*)(val* self, val* p0, val* p1))(var_v->class->vft[COLOR_nit__abstract_compiler__AbstractCompilerVisitor__compile_callsite]))(var_v, var_it_meth, var_) /* compile_callsite on <var_v:AbstractCompilerVisitor>*/;
-}
-var_it = var16;
-var17 = NULL;
-if (var_it == NULL) {
-var18 = 0; /* is null */
-} else {
-var18 = 1; /* arg is null and recv is not */
+nit___nit__AbstractCompilerVisitor___add(var_v, var19); /* Direct call abstract_compiler#AbstractCompilerVisitor#add on <var_v:AbstractCompilerVisitor>*/
 }
-if (0) {
-{ /* Inline kernel#Object#!= (var_it,var17) on <var_it:nullable RuntimeVariable> */
-var_other = var17;
 {
-var21 = ((short int (*)(val* self, val* p0))(var_it->class->vft[COLOR_standard__kernel__Object___61d_61d]))(var_it, var_other) /* == on <var_it:nullable RuntimeVariable(RuntimeVariable)>*/;
-}
-var22 = !var21;
-var19 = var22;
-goto RET_LABEL20;
-RET_LABEL20:(void)0;
-}
-var18 = var19;
+{ /* Inline parser_nodes#AIfExpr#n_then (self) on <self:AIfExpr> */
+var22 = self->attrs[COLOR_nit__parser_nodes__AIfExpr___n_then].val; /* _n_then on <self:AIfExpr> */
+var20 = var22;
+RET_LABEL21:(void)0;
 }
-if (unlikely(!var18)) {
-PRINT_ERROR("Runtime error: %s", "Assert failed");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 2565);
-show_backtrace(1);
 }
-if (varonce) {
-var23 = varonce;
-} else {
-var24 = "for(;;) {";
-var25 = 9;
-var26 = standard___standard__NativeString___to_s_with_length(var24, var25);
-var23 = var26;
-varonce = var23;
+if (unlikely(var20 == NULL)) {
+PRINT_ERROR("Runtime error: %s", "Cast failed");
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 2705);
+fatal_exit(1);
 }
 {
-nit___nit__AbstractCompilerVisitor___add(var_v, var23); /* Direct call abstract_compiler#AbstractCompilerVisitor#add on <var_v:AbstractCompilerVisitor>*/
+var23 = nit___nit__AbstractCompilerVisitor___expr(var_v, var20, ((val*)NULL));
 }
 {
-{ /* Inline typing#AForExpr#method_is_ok (self) on <self:AForExpr> */
-var29 = self->attrs[COLOR_nit__typing__AForExpr___method_is_ok].val; /* _method_is_ok on <self:AForExpr> */
-var27 = var29;
-RET_LABEL28:(void)0;
+nit___nit__AbstractCompilerVisitor___assign(var_v, var_res, var23); /* Direct call abstract_compiler#AbstractCompilerVisitor#assign on <var_v:AbstractCompilerVisitor>*/
 }
-}
-var_isok_meth = var27;
-var30 = NULL;
-if (var_isok_meth == NULL) {
-var31 = 0; /* is null */
+if (likely(varonce24!=NULL)) {
+var25 = varonce24;
 } else {
-var31 = 1; /* arg is null and recv is not */
+var26 = "} else {";
+var27 = standard___standard__NativeString___to_s_with_length(var26, 8l);
+var25 = var27;
+varonce24 = var25;
 }
-if (0) {
-{ /* Inline kernel#Object#!= (var_isok_meth,var30) on <var_isok_meth:nullable CallSite> */
-var_other = var30;
 {
-var34 = ((short int (*)(val* self, val* p0))(var_isok_meth->class->vft[COLOR_standard__kernel__Object___61d_61d]))(var_isok_meth, var_other) /* == on <var_isok_meth:nullable CallSite(CallSite)>*/;
-}
-var35 = !var34;
-var32 = var35;
-goto RET_LABEL33;
-RET_LABEL33:(void)0;
+nit___nit__AbstractCompilerVisitor___add(var_v, var25); /* Direct call abstract_compiler#AbstractCompilerVisitor#add on <var_v:AbstractCompilerVisitor>*/
 }
-var31 = var32;
+{
+{ /* Inline parser_nodes#AIfExpr#n_else (self) on <self:AIfExpr> */
+var30 = self->attrs[COLOR_nit__parser_nodes__AIfExpr___n_else].val; /* _n_else on <self:AIfExpr> */
+var28 = var30;
+RET_LABEL29:(void)0;
 }
-if (unlikely(!var31)) {
-PRINT_ERROR("Runtime error: %s", "Assert failed");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 2568);
-show_backtrace(1);
 }
-var36 = NEW_standard__Array(&type_standard__Array__nit__RuntimeVariable);
-var37 = 1;
-{
-standard___standard__Array___with_capacity(var36, var37); /* Direct call array#Array#with_capacity on <var36:Array[RuntimeVariable]>*/
+if (unlikely(var28 == NULL)) {
+PRINT_ERROR("Runtime error: %s", "Cast failed");
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 2707);
+fatal_exit(1);
 }
-var_38 = var36;
 {
-standard___standard__AbstractArray___standard__abstract_collection__Sequence__push(var_38, var_it); /* Direct call array#AbstractArray#push on <var_38:Array[RuntimeVariable]>*/
+var31 = nit___nit__AbstractCompilerVisitor___expr(var_v, var28, ((val*)NULL));
 }
 {
-var39 = ((val* (*)(val* self, val* p0, val* p1))(var_v->class->vft[COLOR_nit__abstract_compiler__AbstractCompilerVisitor__compile_callsite]))(var_v, var_isok_meth, var_38) /* compile_callsite on <var_v:AbstractCompilerVisitor>*/;
+nit___nit__AbstractCompilerVisitor___assign(var_v, var_res, var31); /* Direct call abstract_compiler#AbstractCompilerVisitor#assign on <var_v:AbstractCompilerVisitor>*/
 }
-var_ok = var39;
-var40 = NULL;
-if (var_ok == NULL) {
-var41 = 0; /* is null */
+if (likely(varonce32!=NULL)) {
+var33 = varonce32;
 } else {
-var41 = 1; /* arg is null and recv is not */
+var34 = "}";
+var35 = standard___standard__NativeString___to_s_with_length(var34, 1l);
+var33 = var35;
+varonce32 = var33;
 }
-if (0) {
-{ /* Inline kernel#Object#!= (var_ok,var40) on <var_ok:nullable RuntimeVariable> */
-var_other = var40;
 {
-var44 = ((short int (*)(val* self, val* p0))(var_ok->class->vft[COLOR_standard__kernel__Object___61d_61d]))(var_ok, var_other) /* == on <var_ok:nullable RuntimeVariable(RuntimeVariable)>*/;
-}
-var45 = !var44;
-var42 = var45;
-goto RET_LABEL43;
-RET_LABEL43:(void)0;
+nit___nit__AbstractCompilerVisitor___add(var_v, var33); /* Direct call abstract_compiler#AbstractCompilerVisitor#add on <var_v:AbstractCompilerVisitor>*/
 }
-var41 = var42;
+var = var_res;
+goto RET_LABEL;
+RET_LABEL:;
+return var;
 }
-if (unlikely(!var41)) {
-PRINT_ERROR("Runtime error: %s", "Assert failed");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 2570);
-show_backtrace(1);
+/* method abstract_compiler#AIfexprExpr#expr for (self: AIfexprExpr, AbstractCompilerVisitor): nullable RuntimeVariable */
+val* nit__abstract_compiler___AIfexprExpr___AExpr__expr(val* self, val* p0) {
+val* var /* : nullable RuntimeVariable */;
+val* var_v /* var v: AbstractCompilerVisitor */;
+val* var1 /* : nullable MType */;
+val* var3 /* : nullable MType */;
+val* var4 /* : RuntimeVariable */;
+val* var_res /* var res: RuntimeVariable */;
+val* var5 /* : AExpr */;
+val* var7 /* : AExpr */;
+val* var8 /* : RuntimeVariable */;
+val* var_cond /* var cond: RuntimeVariable */;
+val* var9 /* : NativeArray[String] */;
+static val* varonce;
+static val* varonce10;
+val* var11 /* : String */;
+char* var12 /* : NativeString */;
+val* var13 /* : FlatString */;
+static val* varonce14;
+val* var15 /* : String */;
+char* var16 /* : NativeString */;
+val* var17 /* : FlatString */;
+val* var18 /* : String */;
+val* var19 /* : String */;
+val* var20 /* : AExpr */;
+val* var22 /* : AExpr */;
+val* var23 /* : RuntimeVariable */;
+static val* varonce24;
+val* var25 /* : String */;
+char* var26 /* : NativeString */;
+val* var27 /* : FlatString */;
+val* var28 /* : AExpr */;
+val* var30 /* : AExpr */;
+val* var31 /* : RuntimeVariable */;
+static val* varonce32;
+val* var33 /* : String */;
+char* var34 /* : NativeString */;
+val* var35 /* : FlatString */;
+var_v = p0;
+{
+{ /* Inline typing#AExpr#mtype (self) on <self:AIfexprExpr> */
+var3 = self->attrs[COLOR_nit__typing__AExpr___mtype].val; /* _mtype on <self:AIfexprExpr> */
+var1 = var3;
+RET_LABEL2:(void)0;
 }
-if (varonce46) {
-var47 = varonce46;
-} else {
-var48 = "if(!";
-var49 = 4;
-var50 = standard___standard__NativeString___to_s_with_length(var48, var49);
-var47 = var50;
-varonce46 = var47;
 }
-if (varonce51) {
-var52 = varonce51;
-} else {
-var53 = ") break;";
-var54 = 8;
-var55 = standard___standard__NativeString___to_s_with_length(var53, var54);
-var52 = var55;
-varonce51 = var52;
+if (unlikely(var1 == NULL)) {
+PRINT_ERROR("Runtime error: %s", "Cast failed");
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 2716);
+fatal_exit(1);
 }
-var56 = NEW_standard__Array(&type_standard__Array__standard__Object);
-{ /* var56 = array_instance Array[Object] */
-var57 = 3;
-var58 = NEW_standard__NativeArray(var57, &type_standard__NativeArray__standard__Object);
-((struct instance_standard__NativeArray*)var58)->values[0] = (val*) var47;
-((struct instance_standard__NativeArray*)var58)->values[1] = (val*) var_ok;
-((struct instance_standard__NativeArray*)var58)->values[2] = (val*) var52;
 {
-((void (*)(val* self, val* p0, long p1))(var56->class->vft[COLOR_standard__array__Array__with_native]))(var56, var58, var57) /* with_native on <var56:Array[Object]>*/;
-}
+var4 = nit___nit__AbstractCompilerVisitor___new_var(var_v, var1);
 }
+var_res = var4;
 {
-var59 = ((val* (*)(val* self))(var56->class->vft[COLOR_standard__string__Object__to_s]))(var56) /* to_s on <var56:Array[Object]>*/;
+{ /* Inline parser_nodes#AIfexprExpr#n_expr (self) on <self:AIfexprExpr> */
+var7 = self->attrs[COLOR_nit__parser_nodes__AIfexprExpr___n_expr].val; /* _n_expr on <self:AIfexprExpr> */
+if (unlikely(var7 == NULL)) {
+PRINT_ERROR("Runtime error: %s", "Uninitialized attribute _n_expr");
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__parser_nodes, 1880);
+fatal_exit(1);
 }
-{
-nit___nit__AbstractCompilerVisitor___add(var_v, var59); /* Direct call abstract_compiler#AbstractCompilerVisitor#add on <var_v:AbstractCompilerVisitor>*/
+var5 = var7;
+RET_LABEL6:(void)0;
 }
-{
-{ /* Inline scope#AForExpr#variables (self) on <self:AForExpr> */
-var62 = self->attrs[COLOR_nit__scope__AForExpr___variables].val; /* _variables on <self:AForExpr> */
-var60 = var62;
-RET_LABEL61:(void)0;
 }
+{
+var8 = nit___nit__AbstractCompilerVisitor___expr_bool(var_v, var5);
 }
-if (var60 == NULL) {
-PRINT_ERROR("Runtime error: %s", "Receiver is null");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 2572);
-show_backtrace(1);
+var_cond = var8;
+if (unlikely(varonce==NULL)) {
+var9 = NEW_standard__NativeArray(3l, &type_standard__NativeArray__standard__String);
+if (likely(varonce10!=NULL)) {
+var11 = varonce10;
 } else {
-{ /* Inline array#AbstractArrayRead#length (var60) on <var60:nullable Array[Variable]> */
-if (unlikely(var60 == NULL)) {
-PRINT_ERROR("Runtime error: %s", "Receiver is null");
-PRINT_ERROR(" (%s:%d)\n", FILE_standard__array, 24);
-show_backtrace(1);
+var12 = "if (";
+var13 = standard___standard__NativeString___to_s_with_length(var12, 4l);
+var11 = var13;
+varonce10 = var11;
 }
-var65 = var60->attrs[COLOR_standard__array__AbstractArrayRead___length].l; /* _length on <var60:nullable Array[Variable]> */
-var63 = var65;
-RET_LABEL64:(void)0;
+((struct instance_standard__NativeArray*)var9)->values[0]=var11;
+if (likely(varonce14!=NULL)) {
+var15 = varonce14;
+} else {
+var16 = "){";
+var17 = standard___standard__NativeString___to_s_with_length(var16, 2l);
+var15 = var17;
+varonce14 = var15;
 }
+((struct instance_standard__NativeArray*)var9)->values[2]=var15;
+} else {
+var9 = varonce;
+varonce = NULL;
 }
-var66 = 1;
 {
-{ /* Inline kernel#Int#== (var63,var66) on <var63:Int> */
-var69 = var63 == var66;
-var67 = var69;
-goto RET_LABEL68;
-RET_LABEL68:(void)0;
-}
+var18 = ((val*(*)(val* self))(var_cond->class->vft[COLOR_standard__string__Object__to_s]))(var_cond); /* to_s on <var_cond:RuntimeVariable>*/
 }
-if (var67){
+((struct instance_standard__NativeArray*)var9)->values[1]=var18;
 {
-{ /* Inline typing#AForExpr#method_item (self) on <self:AForExpr> */
-var72 = self->attrs[COLOR_nit__typing__AForExpr___method_item].val; /* _method_item on <self:AForExpr> */
-var70 = var72;
-RET_LABEL71:(void)0;
-}
+var19 = ((val*(*)(val* self))(var9->class->vft[COLOR_standard__string__NativeArray__native_to_s]))(var9); /* native_to_s on <var9:NativeArray[String]>*/
 }
-var_item_meth = var70;
-var73 = NULL;
-if (var_item_meth == NULL) {
-var74 = 0; /* is null */
-} else {
-var74 = 1; /* arg is null and recv is not */
-}
-if (0) {
-{ /* Inline kernel#Object#!= (var_item_meth,var73) on <var_item_meth:nullable CallSite> */
-var_other = var73;
+varonce = var9;
 {
-var77 = ((short int (*)(val* self, val* p0))(var_item_meth->class->vft[COLOR_standard__kernel__Object___61d_61d]))(var_item_meth, var_other) /* == on <var_item_meth:nullable CallSite(CallSite)>*/;
-}
-var78 = !var77;
-var75 = var78;
-goto RET_LABEL76;
-RET_LABEL76:(void)0;
+nit___nit__AbstractCompilerVisitor___add(var_v, var19); /* Direct call abstract_compiler#AbstractCompilerVisitor#add on <var_v:AbstractCompilerVisitor>*/
 }
-var74 = var75;
+{
+{ /* Inline parser_nodes#AIfexprExpr#n_then (self) on <self:AIfexprExpr> */
+var22 = self->attrs[COLOR_nit__parser_nodes__AIfexprExpr___n_then].val; /* _n_then on <self:AIfexprExpr> */
+if (unlikely(var22 == NULL)) {
+PRINT_ERROR("Runtime error: %s", "Uninitialized attribute _n_then");
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__parser_nodes, 1886);
+fatal_exit(1);
 }
-if (unlikely(!var74)) {
-PRINT_ERROR("Runtime error: %s", "Assert failed");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 2574);
-show_backtrace(1);
+var20 = var22;
+RET_LABEL21:(void)0;
 }
-var79 = NEW_standard__Array(&type_standard__Array__nit__RuntimeVariable);
-var80 = 1;
-{
-standard___standard__Array___with_capacity(var79, var80); /* Direct call array#Array#with_capacity on <var79:Array[RuntimeVariable]>*/
 }
-var_81 = var79;
 {
-standard___standard__AbstractArray___standard__abstract_collection__Sequence__push(var_81, var_it); /* Direct call array#AbstractArray#push on <var_81:Array[RuntimeVariable]>*/
+var23 = nit___nit__AbstractCompilerVisitor___expr(var_v, var20, ((val*)NULL));
 }
 {
-var82 = ((val* (*)(val* self, val* p0, val* p1))(var_v->class->vft[COLOR_nit__abstract_compiler__AbstractCompilerVisitor__compile_callsite]))(var_v, var_item_meth, var_81) /* compile_callsite on <var_v:AbstractCompilerVisitor>*/;
+nit___nit__AbstractCompilerVisitor___assign(var_v, var_res, var23); /* Direct call abstract_compiler#AbstractCompilerVisitor#assign on <var_v:AbstractCompilerVisitor>*/
 }
-var_i = var82;
-var83 = NULL;
-if (var_i == NULL) {
-var84 = 0; /* is null */
+if (likely(varonce24!=NULL)) {
+var25 = varonce24;
 } else {
-var84 = 1; /* arg is null and recv is not */
+var26 = "} else {";
+var27 = standard___standard__NativeString___to_s_with_length(var26, 8l);
+var25 = var27;
+varonce24 = var25;
 }
-if (0) {
-{ /* Inline kernel#Object#!= (var_i,var83) on <var_i:nullable RuntimeVariable> */
-var_other = var83;
 {
-var87 = ((short int (*)(val* self, val* p0))(var_i->class->vft[COLOR_standard__kernel__Object___61d_61d]))(var_i, var_other) /* == on <var_i:nullable RuntimeVariable(RuntimeVariable)>*/;
-}
-var88 = !var87;
-var85 = var88;
-goto RET_LABEL86;
-RET_LABEL86:(void)0;
-}
-var84 = var85;
-}
-if (unlikely(!var84)) {
-PRINT_ERROR("Runtime error: %s", "Assert failed");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 2576);
-show_backtrace(1);
+nit___nit__AbstractCompilerVisitor___add(var_v, var25); /* Direct call abstract_compiler#AbstractCompilerVisitor#add on <var_v:AbstractCompilerVisitor>*/
 }
 {
-{ /* Inline scope#AForExpr#variables (self) on <self:AForExpr> */
-var91 = self->attrs[COLOR_nit__scope__AForExpr___variables].val; /* _variables on <self:AForExpr> */
-var89 = var91;
-RET_LABEL90:(void)0;
+{ /* Inline parser_nodes#AIfexprExpr#n_else (self) on <self:AIfexprExpr> */
+var30 = self->attrs[COLOR_nit__parser_nodes__AIfexprExpr___n_else].val; /* _n_else on <self:AIfexprExpr> */
+if (unlikely(var30 == NULL)) {
+PRINT_ERROR("Runtime error: %s", "Uninitialized attribute _n_else");
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__parser_nodes, 1892);
+fatal_exit(1);
 }
+var28 = var30;
+RET_LABEL29:(void)0;
 }
-if (var89 == NULL) {
-PRINT_ERROR("Runtime error: %s", "Receiver is null");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 2577);
-show_backtrace(1);
-} else {
-var92 = standard___standard__SequenceRead___Collection__first(var89);
 }
 {
-var93 = nit___nit__AbstractCompilerVisitor___variable(var_v, var92);
+var31 = nit___nit__AbstractCompilerVisitor___expr(var_v, var28, ((val*)NULL));
 }
 {
-nit___nit__AbstractCompilerVisitor___assign(var_v, var93, var_i); /* Direct call abstract_compiler#AbstractCompilerVisitor#assign on <var_v:AbstractCompilerVisitor>*/
+nit___nit__AbstractCompilerVisitor___assign(var_v, var_res, var31); /* Direct call abstract_compiler#AbstractCompilerVisitor#assign on <var_v:AbstractCompilerVisitor>*/
 }
+if (likely(varonce32!=NULL)) {
+var33 = varonce32;
 } else {
-{
-{ /* Inline scope#AForExpr#variables (self) on <self:AForExpr> */
-var96 = self->attrs[COLOR_nit__scope__AForExpr___variables].val; /* _variables on <self:AForExpr> */
-var94 = var96;
-RET_LABEL95:(void)0;
+var34 = "}";
+var35 = standard___standard__NativeString___to_s_with_length(var34, 1l);
+var33 = var35;
+varonce32 = var33;
 }
+{
+nit___nit__AbstractCompilerVisitor___add(var_v, var33); /* Direct call abstract_compiler#AbstractCompilerVisitor#add on <var_v:AbstractCompilerVisitor>*/
 }
-if (var94 == NULL) {
-PRINT_ERROR("Runtime error: %s", "Receiver is null");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 2578);
-show_backtrace(1);
-} else {
-{ /* Inline array#AbstractArrayRead#length (var94) on <var94:nullable Array[Variable]> */
-if (unlikely(var94 == NULL)) {
-PRINT_ERROR("Runtime error: %s", "Receiver is null");
-PRINT_ERROR(" (%s:%d)\n", FILE_standard__array, 24);
-show_backtrace(1);
+var = var_res;
+goto RET_LABEL;
+RET_LABEL:;
+return var;
+}
+/* method abstract_compiler#ADoExpr#stmt for (self: ADoExpr, AbstractCompilerVisitor) */
+void nit__abstract_compiler___ADoExpr___AExpr__stmt(val* self, val* p0) {
+val* var_v /* var v: AbstractCompilerVisitor */;
+val* var /* : nullable AExpr */;
+val* var2 /* : nullable AExpr */;
+val* var3 /* : nullable EscapeMark */;
+val* var5 /* : nullable EscapeMark */;
+var_v = p0;
+{
+{ /* Inline parser_nodes#ADoExpr#n_block (self) on <self:ADoExpr> */
+var2 = self->attrs[COLOR_nit__parser_nodes__ADoExpr___n_block].val; /* _n_block on <self:ADoExpr> */
+var = var2;
+RET_LABEL1:(void)0;
 }
-var99 = var94->attrs[COLOR_standard__array__AbstractArrayRead___length].l; /* _length on <var94:nullable Array[Variable]> */
-var97 = var99;
-RET_LABEL98:(void)0;
 }
+{
+nit___nit__AbstractCompilerVisitor___stmt(var_v, var); /* Direct call abstract_compiler#AbstractCompilerVisitor#stmt on <var_v:AbstractCompilerVisitor>*/
 }
-var100 = 2;
 {
-{ /* Inline kernel#Int#== (var97,var100) on <var97:Int> */
-var103 = var97 == var100;
-var101 = var103;
-goto RET_LABEL102;
-RET_LABEL102:(void)0;
+{ /* Inline scope#ADoExpr#break_mark (self) on <self:ADoExpr> */
+var5 = self->attrs[COLOR_nit__scope__ADoExpr___break_mark].val; /* _break_mark on <self:ADoExpr> */
+var3 = var5;
+RET_LABEL4:(void)0;
 }
 }
-if (var101){
 {
-{ /* Inline typing#AForExpr#method_key (self) on <self:AForExpr> */
-var106 = self->attrs[COLOR_nit__typing__AForExpr___method_key].val; /* _method_key on <self:AForExpr> */
-var104 = var106;
-RET_LABEL105:(void)0;
+nit___nit__AbstractCompilerVisitor___add_escape_label(var_v, var3); /* Direct call abstract_compiler#AbstractCompilerVisitor#add_escape_label on <var_v:AbstractCompilerVisitor>*/
 }
+RET_LABEL:;
 }
-var_key_meth = var104;
-var107 = NULL;
-if (var_key_meth == NULL) {
-var108 = 0; /* is null */
+/* method abstract_compiler#AWhileExpr#stmt for (self: AWhileExpr, AbstractCompilerVisitor) */
+void nit__abstract_compiler___AWhileExpr___AExpr__stmt(val* self, val* p0) {
+val* var_v /* var v: AbstractCompilerVisitor */;
+static val* varonce;
+val* var /* : String */;
+char* var1 /* : NativeString */;
+val* var2 /* : FlatString */;
+val* var3 /* : AExpr */;
+val* var5 /* : AExpr */;
+val* var6 /* : RuntimeVariable */;
+val* var_cond /* var cond: RuntimeVariable */;
+val* var8 /* : NativeArray[String] */;
+static val* varonce7;
+static val* varonce9;
+val* var10 /* : String */;
+char* var11 /* : NativeString */;
+val* var12 /* : FlatString */;
+static val* varonce13;
+val* var14 /* : String */;
+char* var15 /* : NativeString */;
+val* var16 /* : FlatString */;
+val* var17 /* : String */;
+val* var18 /* : String */;
+val* var19 /* : nullable AExpr */;
+val* var21 /* : nullable AExpr */;
+val* var22 /* : nullable EscapeMark */;
+val* var24 /* : nullable EscapeMark */;
+static val* varonce25;
+val* var26 /* : String */;
+char* var27 /* : NativeString */;
+val* var28 /* : FlatString */;
+val* var29 /* : nullable EscapeMark */;
+val* var31 /* : nullable EscapeMark */;
+var_v = p0;
+if (likely(varonce!=NULL)) {
+var = varonce;
 } else {
-var108 = 1; /* arg is null and recv is not */
+var1 = "for(;;) {";
+var2 = standard___standard__NativeString___to_s_with_length(var1, 9l);
+var = var2;
+varonce = var;
 }
-if (0) {
-{ /* Inline kernel#Object#!= (var_key_meth,var107) on <var_key_meth:nullable CallSite> */
-var_other = var107;
 {
-var111 = ((short int (*)(val* self, val* p0))(var_key_meth->class->vft[COLOR_standard__kernel__Object___61d_61d]))(var_key_meth, var_other) /* == on <var_key_meth:nullable CallSite(CallSite)>*/;
+nit___nit__AbstractCompilerVisitor___add(var_v, var); /* Direct call abstract_compiler#AbstractCompilerVisitor#add on <var_v:AbstractCompilerVisitor>*/
 }
-var112 = !var111;
-var109 = var112;
-goto RET_LABEL110;
-RET_LABEL110:(void)0;
+{
+{ /* Inline parser_nodes#AWhileExpr#n_expr (self) on <self:AWhileExpr> */
+var5 = self->attrs[COLOR_nit__parser_nodes__AWhileExpr___n_expr].val; /* _n_expr on <self:AWhileExpr> */
+if (unlikely(var5 == NULL)) {
+PRINT_ERROR("Runtime error: %s", "Uninitialized attribute _n_expr");
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__parser_nodes, 1904);
+fatal_exit(1);
 }
-var108 = var109;
+var3 = var5;
+RET_LABEL4:(void)0;
 }
-if (unlikely(!var108)) {
-PRINT_ERROR("Runtime error: %s", "Assert failed");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 2580);
-show_backtrace(1);
 }
-var113 = NEW_standard__Array(&type_standard__Array__nit__RuntimeVariable);
-var114 = 1;
 {
-standard___standard__Array___with_capacity(var113, var114); /* Direct call array#Array#with_capacity on <var113:Array[RuntimeVariable]>*/
+var6 = nit___nit__AbstractCompilerVisitor___expr_bool(var_v, var3);
+}
+var_cond = var6;
+if (unlikely(varonce7==NULL)) {
+var8 = NEW_standard__NativeArray(3l, &type_standard__NativeArray__standard__String);
+if (likely(varonce9!=NULL)) {
+var10 = varonce9;
+} else {
+var11 = "if (!";
+var12 = standard___standard__NativeString___to_s_with_length(var11, 5l);
+var10 = var12;
+varonce9 = var10;
+}
+((struct instance_standard__NativeArray*)var8)->values[0]=var10;
+if (likely(varonce13!=NULL)) {
+var14 = varonce13;
+} else {
+var15 = ") break;";
+var16 = standard___standard__NativeString___to_s_with_length(var15, 8l);
+var14 = var16;
+varonce13 = var14;
+}
+((struct instance_standard__NativeArray*)var8)->values[2]=var14;
+} else {
+var8 = varonce7;
+varonce7 = NULL;
 }
-var_115 = var113;
 {
-standard___standard__AbstractArray___standard__abstract_collection__Sequence__push(var_115, var_it); /* Direct call array#AbstractArray#push on <var_115:Array[RuntimeVariable]>*/
+var17 = ((val*(*)(val* self))(var_cond->class->vft[COLOR_standard__string__Object__to_s]))(var_cond); /* to_s on <var_cond:RuntimeVariable>*/
 }
+((struct instance_standard__NativeArray*)var8)->values[1]=var17;
 {
-var116 = ((val* (*)(val* self, val* p0, val* p1))(var_v->class->vft[COLOR_nit__abstract_compiler__AbstractCompilerVisitor__compile_callsite]))(var_v, var_key_meth, var_115) /* compile_callsite on <var_v:AbstractCompilerVisitor>*/;
+var18 = ((val*(*)(val* self))(var8->class->vft[COLOR_standard__string__NativeArray__native_to_s]))(var8); /* native_to_s on <var8:NativeArray[String]>*/
 }
-var_i117 = var116;
-var118 = NULL;
-if (var_i117 == NULL) {
-var119 = 0; /* is null */
-} else {
-var119 = 1; /* arg is null and recv is not */
+varonce7 = var8;
+{
+nit___nit__AbstractCompilerVisitor___add(var_v, var18); /* Direct call abstract_compiler#AbstractCompilerVisitor#add on <var_v:AbstractCompilerVisitor>*/
 }
-if (0) {
-{ /* Inline kernel#Object#!= (var_i117,var118) on <var_i117:nullable RuntimeVariable> */
-var_other = var118;
 {
-var122 = ((short int (*)(val* self, val* p0))(var_i117->class->vft[COLOR_standard__kernel__Object___61d_61d]))(var_i117, var_other) /* == on <var_i117:nullable RuntimeVariable(RuntimeVariable)>*/;
+{ /* Inline parser_nodes#AWhileExpr#n_block (self) on <self:AWhileExpr> */
+var21 = self->attrs[COLOR_nit__parser_nodes__AWhileExpr___n_block].val; /* _n_block on <self:AWhileExpr> */
+var19 = var21;
+RET_LABEL20:(void)0;
 }
-var123 = !var122;
-var120 = var123;
-goto RET_LABEL121;
-RET_LABEL121:(void)0;
 }
-var119 = var120;
+{
+nit___nit__AbstractCompilerVisitor___stmt(var_v, var19); /* Direct call abstract_compiler#AbstractCompilerVisitor#stmt on <var_v:AbstractCompilerVisitor>*/
+}
+{
+{ /* Inline scope#AWhileExpr#continue_mark (self) on <self:AWhileExpr> */
+var24 = self->attrs[COLOR_nit__scope__AWhileExpr___continue_mark].val; /* _continue_mark on <self:AWhileExpr> */
+var22 = var24;
+RET_LABEL23:(void)0;
 }
-if (unlikely(!var119)) {
-PRINT_ERROR("Runtime error: %s", "Assert failed");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 2582);
-show_backtrace(1);
 }
 {
-{ /* Inline scope#AForExpr#variables (self) on <self:AForExpr> */
-var126 = self->attrs[COLOR_nit__scope__AForExpr___variables].val; /* _variables on <self:AForExpr> */
-var124 = var126;
-RET_LABEL125:(void)0;
+nit___nit__AbstractCompilerVisitor___add_escape_label(var_v, var22); /* Direct call abstract_compiler#AbstractCompilerVisitor#add_escape_label on <var_v:AbstractCompilerVisitor>*/
 }
+if (likely(varonce25!=NULL)) {
+var26 = varonce25;
+} else {
+var27 = "}";
+var28 = standard___standard__NativeString___to_s_with_length(var27, 1l);
+var26 = var28;
+varonce25 = var26;
 }
-var127 = 0;
-if (var124 == NULL) {
-PRINT_ERROR("Runtime error: %s", "Receiver is null");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 2583);
-show_backtrace(1);
+{
+nit___nit__AbstractCompilerVisitor___add(var_v, var26); /* Direct call abstract_compiler#AbstractCompilerVisitor#add on <var_v:AbstractCompilerVisitor>*/
+}
+{
+{ /* Inline scope#AWhileExpr#break_mark (self) on <self:AWhileExpr> */
+var31 = self->attrs[COLOR_nit__scope__AWhileExpr___break_mark].val; /* _break_mark on <self:AWhileExpr> */
+var29 = var31;
+RET_LABEL30:(void)0;
+}
+}
+{
+nit___nit__AbstractCompilerVisitor___add_escape_label(var_v, var29); /* Direct call abstract_compiler#AbstractCompilerVisitor#add_escape_label on <var_v:AbstractCompilerVisitor>*/
+}
+RET_LABEL:;
+}
+/* method abstract_compiler#ALoopExpr#stmt for (self: ALoopExpr, AbstractCompilerVisitor) */
+void nit__abstract_compiler___ALoopExpr___AExpr__stmt(val* self, val* p0) {
+val* var_v /* var v: AbstractCompilerVisitor */;
+static val* varonce;
+val* var /* : String */;
+char* var1 /* : NativeString */;
+val* var2 /* : FlatString */;
+val* var3 /* : nullable AExpr */;
+val* var5 /* : nullable AExpr */;
+val* var6 /* : nullable EscapeMark */;
+val* var8 /* : nullable EscapeMark */;
+static val* varonce9;
+val* var10 /* : String */;
+char* var11 /* : NativeString */;
+val* var12 /* : FlatString */;
+val* var13 /* : nullable EscapeMark */;
+val* var15 /* : nullable EscapeMark */;
+var_v = p0;
+if (likely(varonce!=NULL)) {
+var = varonce;
 } else {
-var128 = standard___standard__Array___standard__abstract_collection__SequenceRead___91d_93d(var124, var127);
+var1 = "for(;;) {";
+var2 = standard___standard__NativeString___to_s_with_length(var1, 9l);
+var = var2;
+varonce = var;
 }
 {
-var129 = nit___nit__AbstractCompilerVisitor___variable(var_v, var128);
+nit___nit__AbstractCompilerVisitor___add(var_v, var); /* Direct call abstract_compiler#AbstractCompilerVisitor#add on <var_v:AbstractCompilerVisitor>*/
 }
 {
-nit___nit__AbstractCompilerVisitor___assign(var_v, var129, var_i117); /* Direct call abstract_compiler#AbstractCompilerVisitor#assign on <var_v:AbstractCompilerVisitor>*/
+{ /* Inline parser_nodes#ALoopExpr#n_block (self) on <self:ALoopExpr> */
+var5 = self->attrs[COLOR_nit__parser_nodes__ALoopExpr___n_block].val; /* _n_block on <self:ALoopExpr> */
+var3 = var5;
+RET_LABEL4:(void)0;
+}
 }
 {
-{ /* Inline typing#AForExpr#method_item (self) on <self:AForExpr> */
-var132 = self->attrs[COLOR_nit__typing__AForExpr___method_item].val; /* _method_item on <self:AForExpr> */
-var130 = var132;
-RET_LABEL131:(void)0;
+nit___nit__AbstractCompilerVisitor___stmt(var_v, var3); /* Direct call abstract_compiler#AbstractCompilerVisitor#stmt on <var_v:AbstractCompilerVisitor>*/
+}
+{
+{ /* Inline scope#ALoopExpr#continue_mark (self) on <self:ALoopExpr> */
+var8 = self->attrs[COLOR_nit__scope__ALoopExpr___continue_mark].val; /* _continue_mark on <self:ALoopExpr> */
+var6 = var8;
+RET_LABEL7:(void)0;
+}
 }
+{
+nit___nit__AbstractCompilerVisitor___add_escape_label(var_v, var6); /* Direct call abstract_compiler#AbstractCompilerVisitor#add_escape_label on <var_v:AbstractCompilerVisitor>*/
 }
-var_item_meth133 = var130;
-var134 = NULL;
-if (var_item_meth133 == NULL) {
-var135 = 0; /* is null */
+if (likely(varonce9!=NULL)) {
+var10 = varonce9;
 } else {
-var135 = 1; /* arg is null and recv is not */
+var11 = "}";
+var12 = standard___standard__NativeString___to_s_with_length(var11, 1l);
+var10 = var12;
+varonce9 = var10;
 }
-if (0) {
-{ /* Inline kernel#Object#!= (var_item_meth133,var134) on <var_item_meth133:nullable CallSite> */
-var_other = var134;
 {
-var138 = ((short int (*)(val* self, val* p0))(var_item_meth133->class->vft[COLOR_standard__kernel__Object___61d_61d]))(var_item_meth133, var_other) /* == on <var_item_meth133:nullable CallSite(CallSite)>*/;
+nit___nit__AbstractCompilerVisitor___add(var_v, var10); /* Direct call abstract_compiler#AbstractCompilerVisitor#add on <var_v:AbstractCompilerVisitor>*/
 }
-var139 = !var138;
-var136 = var139;
-goto RET_LABEL137;
-RET_LABEL137:(void)0;
+{
+{ /* Inline scope#ALoopExpr#break_mark (self) on <self:ALoopExpr> */
+var15 = self->attrs[COLOR_nit__scope__ALoopExpr___break_mark].val; /* _break_mark on <self:ALoopExpr> */
+var13 = var15;
+RET_LABEL14:(void)0;
 }
-var135 = var136;
 }
-if (unlikely(!var135)) {
-PRINT_ERROR("Runtime error: %s", "Assert failed");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 2585);
-show_backtrace(1);
+{
+nit___nit__AbstractCompilerVisitor___add_escape_label(var_v, var13); /* Direct call abstract_compiler#AbstractCompilerVisitor#add_escape_label on <var_v:AbstractCompilerVisitor>*/
+}
+RET_LABEL:;
 }
-var140 = NEW_standard__Array(&type_standard__Array__nit__RuntimeVariable);
-var141 = 1;
+/* method abstract_compiler#AForExpr#stmt for (self: AForExpr, AbstractCompilerVisitor) */
+void nit__abstract_compiler___AForExpr___AExpr__stmt(val* self, val* p0) {
+val* var_v /* var v: AbstractCompilerVisitor */;
+val* var /* : AExpr */;
+val* var2 /* : AExpr */;
+val* var3 /* : RuntimeVariable */;
+val* var_cl /* var cl: RuntimeVariable */;
+val* var4 /* : nullable CallSite */;
+val* var6 /* : nullable CallSite */;
+val* var_it_meth /* var it_meth: nullable CallSite */;
+short int var7 /* : Bool */;
+short int var8 /* : Bool */;
+val* var_other /* var other: nullable Object */;
+short int var10 /* : Bool */;
+short int var11 /* : Bool */;
+val* var12 /* : Array[RuntimeVariable] */;
+val* var_ /* var : Array[RuntimeVariable] */;
+val* var13 /* : nullable RuntimeVariable */;
+val* var_it /* var it: nullable RuntimeVariable */;
+short int var14 /* : Bool */;
+short int var15 /* : Bool */;
+short int var17 /* : Bool */;
+short int var18 /* : Bool */;
+static val* varonce;
+val* var19 /* : String */;
+char* var20 /* : NativeString */;
+val* var21 /* : FlatString */;
+val* var22 /* : nullable CallSite */;
+val* var24 /* : nullable CallSite */;
+val* var_isok_meth /* var isok_meth: nullable CallSite */;
+short int var25 /* : Bool */;
+short int var26 /* : Bool */;
+short int var28 /* : Bool */;
+short int var29 /* : Bool */;
+val* var30 /* : Array[RuntimeVariable] */;
+val* var_31 /* var : Array[RuntimeVariable] */;
+val* var32 /* : nullable RuntimeVariable */;
+val* var_ok /* var ok: nullable RuntimeVariable */;
+short int var33 /* : Bool */;
+short int var34 /* : Bool */;
+short int var36 /* : Bool */;
+short int var37 /* : Bool */;
+val* var39 /* : NativeArray[String] */;
+static val* varonce38;
+static val* varonce40;
+val* var41 /* : String */;
+char* var42 /* : NativeString */;
+val* var43 /* : FlatString */;
+static val* varonce44;
+val* var45 /* : String */;
+char* var46 /* : NativeString */;
+val* var47 /* : FlatString */;
+val* var48 /* : String */;
+val* var49 /* : String */;
+val* var50 /* : nullable Array[Variable] */;
+val* var52 /* : nullable Array[Variable] */;
+long var53 /* : Int */;
+long var55 /* : Int */;
+short int var56 /* : Bool */;
+short int var58 /* : Bool */;
+val* var59 /* : nullable CallSite */;
+val* var61 /* : nullable CallSite */;
+val* var_item_meth /* var item_meth: nullable CallSite */;
+short int var62 /* : Bool */;
+short int var63 /* : Bool */;
+short int var65 /* : Bool */;
+short int var66 /* : Bool */;
+val* var67 /* : Array[RuntimeVariable] */;
+val* var_68 /* var : Array[RuntimeVariable] */;
+val* var69 /* : nullable RuntimeVariable */;
+val* var_i /* var i: nullable RuntimeVariable */;
+short int var70 /* : Bool */;
+short int var71 /* : Bool */;
+short int var73 /* : Bool */;
+short int var74 /* : Bool */;
+val* var75 /* : nullable Array[Variable] */;
+val* var77 /* : nullable Array[Variable] */;
+val* var78 /* : nullable Object */;
+val* var79 /* : RuntimeVariable */;
+val* var80 /* : nullable Array[Variable] */;
+val* var82 /* : nullable Array[Variable] */;
+long var83 /* : Int */;
+long var85 /* : Int */;
+short int var86 /* : Bool */;
+short int var88 /* : Bool */;
+val* var89 /* : nullable CallSite */;
+val* var91 /* : nullable CallSite */;
+val* var_key_meth /* var key_meth: nullable CallSite */;
+short int var92 /* : Bool */;
+short int var93 /* : Bool */;
+short int var95 /* : Bool */;
+short int var96 /* : Bool */;
+val* var97 /* : Array[RuntimeVariable] */;
+val* var_98 /* var : Array[RuntimeVariable] */;
+val* var99 /* : nullable RuntimeVariable */;
+val* var_i100 /* var i: nullable RuntimeVariable */;
+short int var101 /* : Bool */;
+short int var102 /* : Bool */;
+short int var104 /* : Bool */;
+short int var105 /* : Bool */;
+val* var106 /* : nullable Array[Variable] */;
+val* var108 /* : nullable Array[Variable] */;
+val* var109 /* : nullable Object */;
+val* var110 /* : RuntimeVariable */;
+val* var111 /* : nullable CallSite */;
+val* var113 /* : nullable CallSite */;
+val* var_item_meth114 /* var item_meth: nullable CallSite */;
+short int var115 /* : Bool */;
+short int var116 /* : Bool */;
+short int var118 /* : Bool */;
+short int var119 /* : Bool */;
+val* var120 /* : Array[RuntimeVariable] */;
+val* var_121 /* var : Array[RuntimeVariable] */;
+val* var122 /* : nullable RuntimeVariable */;
+short int var123 /* : Bool */;
+short int var124 /* : Bool */;
+short int var126 /* : Bool */;
+short int var127 /* : Bool */;
+val* var128 /* : nullable Array[Variable] */;
+val* var130 /* : nullable Array[Variable] */;
+val* var131 /* : nullable Object */;
+val* var132 /* : RuntimeVariable */;
+val* var133 /* : nullable AExpr */;
+val* var135 /* : nullable AExpr */;
+val* var136 /* : nullable EscapeMark */;
+val* var138 /* : nullable EscapeMark */;
+val* var139 /* : nullable CallSite */;
+val* var141 /* : nullable CallSite */;
+val* var_next_meth /* var next_meth: nullable CallSite */;
+short int var142 /* : Bool */;
+short int var143 /* : Bool */;
+short int var145 /* : Bool */;
+short int var146 /* : Bool */;
+val* var147 /* : Array[RuntimeVariable] */;
+val* var_148 /* var : Array[RuntimeVariable] */;
+val* var149 /* : nullable RuntimeVariable */;
+static val* varonce150;
+val* var151 /* : String */;
+char* var152 /* : NativeString */;
+val* var153 /* : FlatString */;
+val* var154 /* : nullable EscapeMark */;
+val* var156 /* : nullable EscapeMark */;
+val* var157 /* : nullable CallSite */;
+val* var159 /* : nullable CallSite */;
+val* var_method_finish /* var method_finish: nullable CallSite */;
+short int var160 /* : Bool */;
+short int var161 /* : Bool */;
+short int var163 /* : Bool */;
+short int var164 /* : Bool */;
+val* var165 /* : Array[RuntimeVariable] */;
+val* var_166 /* var : Array[RuntimeVariable] */;
+val* var167 /* : nullable RuntimeVariable */;
+var_v = p0;
 {
-standard___standard__Array___with_capacity(var140, var141); /* Direct call array#Array#with_capacity on <var140:Array[RuntimeVariable]>*/
+{ /* Inline parser_nodes#AForExpr#n_expr (self) on <self:AForExpr> */
+var2 = self->attrs[COLOR_nit__parser_nodes__AForExpr___n_expr].val; /* _n_expr on <self:AForExpr> */
+if (unlikely(var2 == NULL)) {
+PRINT_ERROR("Runtime error: %s", "Uninitialized attribute _n_expr");
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__parser_nodes, 1940);
+fatal_exit(1);
+}
+var = var2;
+RET_LABEL1:(void)0;
+}
 }
-var_142 = var140;
 {
-standard___standard__AbstractArray___standard__abstract_collection__Sequence__push(var_142, var_it); /* Direct call array#AbstractArray#push on <var_142:Array[RuntimeVariable]>*/
+var3 = nit___nit__AbstractCompilerVisitor___expr(var_v, var, ((val*)NULL));
 }
+var_cl = var3;
 {
-var143 = ((val* (*)(val* self, val* p0, val* p1))(var_v->class->vft[COLOR_nit__abstract_compiler__AbstractCompilerVisitor__compile_callsite]))(var_v, var_item_meth133, var_142) /* compile_callsite on <var_v:AbstractCompilerVisitor>*/;
+{ /* Inline typing#AForExpr#method_iterator (self) on <self:AForExpr> */
+var6 = self->attrs[COLOR_nit__typing__AForExpr___method_iterator].val; /* _method_iterator on <self:AForExpr> */
+var4 = var6;
+RET_LABEL5:(void)0;
+}
 }
-var_i117 = var143;
-var144 = NULL;
-if (var_i117 == NULL) {
-var145 = 0; /* is null */
+var_it_meth = var4;
+if (var_it_meth == NULL) {
+var7 = 0; /* is null */
 } else {
-var145 = 1; /* arg is null and recv is not */
+var7 = 1; /* arg is null and recv is not */
 }
 if (0) {
-{ /* Inline kernel#Object#!= (var_i117,var144) on <var_i117:nullable RuntimeVariable> */
-var_other = var144;
+{ /* Inline kernel#Object#!= (var_it_meth,((val*)NULL)) on <var_it_meth:nullable CallSite> */
+var_other = ((val*)NULL);
 {
-var148 = ((short int (*)(val* self, val* p0))(var_i117->class->vft[COLOR_standard__kernel__Object___61d_61d]))(var_i117, var_other) /* == on <var_i117:nullable RuntimeVariable(RuntimeVariable)>*/;
+var10 = ((short int(*)(val* self, val* p0))(var_it_meth->class->vft[COLOR_standard__kernel__Object___61d_61d]))(var_it_meth, var_other); /* == on <var_it_meth:nullable CallSite(CallSite)>*/
 }
-var149 = !var148;
-var146 = var149;
-goto RET_LABEL147;
-RET_LABEL147:(void)0;
+var11 = !var10;
+var8 = var11;
+goto RET_LABEL9;
+RET_LABEL9:(void)0;
 }
-var145 = var146;
+var7 = var8;
 }
-if (unlikely(!var145)) {
+if (unlikely(!var7)) {
 PRINT_ERROR("Runtime error: %s", "Assert failed");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 2587);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 2764);
+fatal_exit(1);
 }
+var12 = NEW_standard__Array(&type_standard__Array__nit__RuntimeVariable);
 {
-{ /* Inline scope#AForExpr#variables (self) on <self:AForExpr> */
-var152 = self->attrs[COLOR_nit__scope__AForExpr___variables].val; /* _variables on <self:AForExpr> */
-var150 = var152;
-RET_LABEL151:(void)0;
+standard___standard__Array___with_capacity(var12, 1l); /* Direct call array#Array#with_capacity on <var12:Array[RuntimeVariable]>*/
+}
+var_ = var12;
+{
+standard___standard__AbstractArray___standard__abstract_collection__Sequence__push(var_, var_cl); /* Direct call array#AbstractArray#push on <var_:Array[RuntimeVariable]>*/
 }
+{
+var13 = ((val*(*)(val* self, val* p0, val* p1))(var_v->class->vft[COLOR_nit__abstract_compiler__AbstractCompilerVisitor__compile_callsite]))(var_v, var_it_meth, var_); /* compile_callsite on <var_v:AbstractCompilerVisitor>*/
 }
-var153 = 1;
-if (var150 == NULL) {
-PRINT_ERROR("Runtime error: %s", "Receiver is null");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 2588);
-show_backtrace(1);
+var_it = var13;
+if (var_it == NULL) {
+var14 = 0; /* is null */
 } else {
-var154 = standard___standard__Array___standard__abstract_collection__SequenceRead___91d_93d(var150, var153);
+var14 = 1; /* arg is null and recv is not */
 }
+if (0) {
+{ /* Inline kernel#Object#!= (var_it,((val*)NULL)) on <var_it:nullable RuntimeVariable> */
+var_other = ((val*)NULL);
 {
-var155 = nit___nit__AbstractCompilerVisitor___variable(var_v, var154);
+var17 = ((short int(*)(val* self, val* p0))(var_it->class->vft[COLOR_standard__kernel__Object___61d_61d]))(var_it, var_other); /* == on <var_it:nullable RuntimeVariable(RuntimeVariable)>*/
 }
-{
-nit___nit__AbstractCompilerVisitor___assign(var_v, var155, var_i117); /* Direct call abstract_compiler#AbstractCompilerVisitor#assign on <var_v:AbstractCompilerVisitor>*/
+var18 = !var17;
+var15 = var18;
+goto RET_LABEL16;
+RET_LABEL16:(void)0;
+}
+var14 = var15;
+}
+if (unlikely(!var14)) {
+PRINT_ERROR("Runtime error: %s", "Assert failed");
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 2766);
+fatal_exit(1);
 }
+if (likely(varonce!=NULL)) {
+var19 = varonce;
 } else {
-PRINT_ERROR("Runtime error: %s", "Aborted");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 2590);
-show_backtrace(1);
+var20 = "for(;;) {";
+var21 = standard___standard__NativeString___to_s_with_length(var20, 9l);
+var19 = var21;
+varonce = var19;
 }
+{
+nit___nit__AbstractCompilerVisitor___add(var_v, var19); /* Direct call abstract_compiler#AbstractCompilerVisitor#add on <var_v:AbstractCompilerVisitor>*/
 }
 {
-{ /* Inline parser_nodes#AForExpr#n_block (self) on <self:AForExpr> */
-var158 = self->attrs[COLOR_nit__parser_nodes__AForExpr___n_block].val; /* _n_block on <self:AForExpr> */
-var156 = var158;
-RET_LABEL157:(void)0;
+{ /* Inline typing#AForExpr#method_is_ok (self) on <self:AForExpr> */
+var24 = self->attrs[COLOR_nit__typing__AForExpr___method_is_ok].val; /* _method_is_ok on <self:AForExpr> */
+var22 = var24;
+RET_LABEL23:(void)0;
 }
 }
-{
-nit___nit__AbstractCompilerVisitor___stmt(var_v, var156); /* Direct call abstract_compiler#AbstractCompilerVisitor#stmt on <var_v:AbstractCompilerVisitor>*/
+var_isok_meth = var22;
+if (var_isok_meth == NULL) {
+var25 = 0; /* is null */
+} else {
+var25 = 1; /* arg is null and recv is not */
 }
+if (0) {
+{ /* Inline kernel#Object#!= (var_isok_meth,((val*)NULL)) on <var_isok_meth:nullable CallSite> */
+var_other = ((val*)NULL);
 {
-{ /* Inline scope#AForExpr#continue_mark (self) on <self:AForExpr> */
-var161 = self->attrs[COLOR_nit__scope__AForExpr___continue_mark].val; /* _continue_mark on <self:AForExpr> */
-var159 = var161;
-RET_LABEL160:(void)0;
+var28 = ((short int(*)(val* self, val* p0))(var_isok_meth->class->vft[COLOR_standard__kernel__Object___61d_61d]))(var_isok_meth, var_other); /* == on <var_isok_meth:nullable CallSite(CallSite)>*/
 }
+var29 = !var28;
+var26 = var29;
+goto RET_LABEL27;
+RET_LABEL27:(void)0;
+}
+var25 = var26;
+}
+if (unlikely(!var25)) {
+PRINT_ERROR("Runtime error: %s", "Assert failed");
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 2769);
+fatal_exit(1);
 }
+var30 = NEW_standard__Array(&type_standard__Array__nit__RuntimeVariable);
 {
-nit___nit__AbstractCompilerVisitor___add_escape_label(var_v, var159); /* Direct call abstract_compiler#AbstractCompilerVisitor#add_escape_label on <var_v:AbstractCompilerVisitor>*/
+standard___standard__Array___with_capacity(var30, 1l); /* Direct call array#Array#with_capacity on <var30:Array[RuntimeVariable]>*/
 }
+var_31 = var30;
 {
-{ /* Inline typing#AForExpr#method_next (self) on <self:AForExpr> */
-var164 = self->attrs[COLOR_nit__typing__AForExpr___method_next].val; /* _method_next on <self:AForExpr> */
-var162 = var164;
-RET_LABEL163:(void)0;
+standard___standard__AbstractArray___standard__abstract_collection__Sequence__push(var_31, var_it); /* Direct call array#AbstractArray#push on <var_31:Array[RuntimeVariable]>*/
 }
+{
+var32 = ((val*(*)(val* self, val* p0, val* p1))(var_v->class->vft[COLOR_nit__abstract_compiler__AbstractCompilerVisitor__compile_callsite]))(var_v, var_isok_meth, var_31); /* compile_callsite on <var_v:AbstractCompilerVisitor>*/
 }
-var_next_meth = var162;
-var165 = NULL;
-if (var_next_meth == NULL) {
-var166 = 0; /* is null */
+var_ok = var32;
+if (var_ok == NULL) {
+var33 = 0; /* is null */
 } else {
-var166 = 1; /* arg is null and recv is not */
+var33 = 1; /* arg is null and recv is not */
 }
 if (0) {
-{ /* Inline kernel#Object#!= (var_next_meth,var165) on <var_next_meth:nullable CallSite> */
-var_other = var165;
+{ /* Inline kernel#Object#!= (var_ok,((val*)NULL)) on <var_ok:nullable RuntimeVariable> */
+var_other = ((val*)NULL);
 {
-var169 = ((short int (*)(val* self, val* p0))(var_next_meth->class->vft[COLOR_standard__kernel__Object___61d_61d]))(var_next_meth, var_other) /* == on <var_next_meth:nullable CallSite(CallSite)>*/;
+var36 = ((short int(*)(val* self, val* p0))(var_ok->class->vft[COLOR_standard__kernel__Object___61d_61d]))(var_ok, var_other); /* == on <var_ok:nullable RuntimeVariable(RuntimeVariable)>*/
 }
-var170 = !var169;
-var167 = var170;
-goto RET_LABEL168;
-RET_LABEL168:(void)0;
+var37 = !var36;
+var34 = var37;
+goto RET_LABEL35;
+RET_LABEL35:(void)0;
 }
-var166 = var167;
+var33 = var34;
 }
-if (unlikely(!var166)) {
+if (unlikely(!var33)) {
 PRINT_ERROR("Runtime error: %s", "Assert failed");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 2595);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 2771);
+fatal_exit(1);
+}
+if (unlikely(varonce38==NULL)) {
+var39 = NEW_standard__NativeArray(3l, &type_standard__NativeArray__standard__String);
+if (likely(varonce40!=NULL)) {
+var41 = varonce40;
+} else {
+var42 = "if(!";
+var43 = standard___standard__NativeString___to_s_with_length(var42, 4l);
+var41 = var43;
+varonce40 = var41;
+}
+((struct instance_standard__NativeArray*)var39)->values[0]=var41;
+if (likely(varonce44!=NULL)) {
+var45 = varonce44;
+} else {
+var46 = ") break;";
+var47 = standard___standard__NativeString___to_s_with_length(var46, 8l);
+var45 = var47;
+varonce44 = var45;
 }
-var171 = NEW_standard__Array(&type_standard__Array__nit__RuntimeVariable);
-var172 = 1;
+((struct instance_standard__NativeArray*)var39)->values[2]=var45;
+} else {
+var39 = varonce38;
+varonce38 = NULL;
+}
+{
+var48 = ((val*(*)(val* self))(var_ok->class->vft[COLOR_standard__string__Object__to_s]))(var_ok); /* to_s on <var_ok:nullable RuntimeVariable(RuntimeVariable)>*/
+}
+((struct instance_standard__NativeArray*)var39)->values[1]=var48;
 {
-standard___standard__Array___with_capacity(var171, var172); /* Direct call array#Array#with_capacity on <var171:Array[RuntimeVariable]>*/
+var49 = ((val*(*)(val* self))(var39->class->vft[COLOR_standard__string__NativeArray__native_to_s]))(var39); /* native_to_s on <var39:NativeArray[String]>*/
 }
-var_173 = var171;
+varonce38 = var39;
 {
-standard___standard__AbstractArray___standard__abstract_collection__Sequence__push(var_173, var_it); /* Direct call array#AbstractArray#push on <var_173:Array[RuntimeVariable]>*/
+nit___nit__AbstractCompilerVisitor___add(var_v, var49); /* Direct call abstract_compiler#AbstractCompilerVisitor#add on <var_v:AbstractCompilerVisitor>*/
 }
 {
-var174 = ((val* (*)(val* self, val* p0, val* p1))(var_v->class->vft[COLOR_nit__abstract_compiler__AbstractCompilerVisitor__compile_callsite]))(var_v, var_next_meth, var_173) /* compile_callsite on <var_v:AbstractCompilerVisitor>*/;
+{ /* Inline scope#AForExpr#variables (self) on <self:AForExpr> */
+var52 = self->attrs[COLOR_nit__scope__AForExpr___variables].val; /* _variables on <self:AForExpr> */
+var50 = var52;
+RET_LABEL51:(void)0;
+}
 }
-if (varonce175) {
-var176 = varonce175;
+if (var50 == NULL) {
+PRINT_ERROR("Runtime error: %s", "Receiver is null");
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 2773);
+fatal_exit(1);
 } else {
-var177 = "}";
-var178 = 1;
-var179 = standard___standard__NativeString___to_s_with_length(var177, var178);
-var176 = var179;
-varonce175 = var176;
+{ /* Inline array#AbstractArrayRead#length (var50) on <var50:nullable Array[Variable]> */
+if (unlikely(var50 == NULL)) {
+PRINT_ERROR("Runtime error: %s", "Receiver is null");
+PRINT_ERROR(" (%s:%d)\n", FILE_standard__array, 26);
+fatal_exit(1);
+}
+var55 = var50->attrs[COLOR_standard__array__AbstractArrayRead___length].l; /* _length on <var50:nullable Array[Variable]> */
+var53 = var55;
+RET_LABEL54:(void)0;
+}
 }
 {
-nit___nit__AbstractCompilerVisitor___add(var_v, var176); /* Direct call abstract_compiler#AbstractCompilerVisitor#add on <var_v:AbstractCompilerVisitor>*/
+{ /* Inline kernel#Int#== (var53,1l) on <var53:Int> */
+var58 = var53 == 1l;
+var56 = var58;
+goto RET_LABEL57;
+RET_LABEL57:(void)0;
 }
+}
+if (var56){
 {
-{ /* Inline scope#AForExpr#break_mark (self) on <self:AForExpr> */
-var182 = self->attrs[COLOR_nit__scope__AForExpr___break_mark].val; /* _break_mark on <self:AForExpr> */
-var180 = var182;
-RET_LABEL181:(void)0;
+{ /* Inline typing#AForExpr#method_item (self) on <self:AForExpr> */
+var61 = self->attrs[COLOR_nit__typing__AForExpr___method_item].val; /* _method_item on <self:AForExpr> */
+var59 = var61;
+RET_LABEL60:(void)0;
+}
+}
+var_item_meth = var59;
+if (var_item_meth == NULL) {
+var62 = 0; /* is null */
+} else {
+var62 = 1; /* arg is null and recv is not */
+}
+if (0) {
+{ /* Inline kernel#Object#!= (var_item_meth,((val*)NULL)) on <var_item_meth:nullable CallSite> */
+var_other = ((val*)NULL);
+{
+var65 = ((short int(*)(val* self, val* p0))(var_item_meth->class->vft[COLOR_standard__kernel__Object___61d_61d]))(var_item_meth, var_other); /* == on <var_item_meth:nullable CallSite(CallSite)>*/
+}
+var66 = !var65;
+var63 = var66;
+goto RET_LABEL64;
+RET_LABEL64:(void)0;
 }
+var62 = var63;
 }
+if (unlikely(!var62)) {
+PRINT_ERROR("Runtime error: %s", "Assert failed");
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 2775);
+fatal_exit(1);
+}
+var67 = NEW_standard__Array(&type_standard__Array__nit__RuntimeVariable);
 {
-nit___nit__AbstractCompilerVisitor___add_escape_label(var_v, var180); /* Direct call abstract_compiler#AbstractCompilerVisitor#add_escape_label on <var_v:AbstractCompilerVisitor>*/
+standard___standard__Array___with_capacity(var67, 1l); /* Direct call array#Array#with_capacity on <var67:Array[RuntimeVariable]>*/
 }
+var_68 = var67;
 {
-{ /* Inline typing#AForExpr#method_finish (self) on <self:AForExpr> */
-var185 = self->attrs[COLOR_nit__typing__AForExpr___method_finish].val; /* _method_finish on <self:AForExpr> */
-var183 = var185;
-RET_LABEL184:(void)0;
+standard___standard__AbstractArray___standard__abstract_collection__Sequence__push(var_68, var_it); /* Direct call array#AbstractArray#push on <var_68:Array[RuntimeVariable]>*/
 }
+{
+var69 = ((val*(*)(val* self, val* p0, val* p1))(var_v->class->vft[COLOR_nit__abstract_compiler__AbstractCompilerVisitor__compile_callsite]))(var_v, var_item_meth, var_68); /* compile_callsite on <var_v:AbstractCompilerVisitor>*/
 }
-var_method_finish = var183;
-var186 = NULL;
-if (var_method_finish == NULL) {
-var187 = 0; /* is null */
+var_i = var69;
+if (var_i == NULL) {
+var70 = 0; /* is null */
 } else {
-var187 = 1; /* arg is null and recv is not */
+var70 = 1; /* arg is null and recv is not */
 }
 if (0) {
-{ /* Inline kernel#Object#!= (var_method_finish,var186) on <var_method_finish:nullable CallSite> */
-var_other = var186;
+{ /* Inline kernel#Object#!= (var_i,((val*)NULL)) on <var_i:nullable RuntimeVariable> */
+var_other = ((val*)NULL);
 {
-var190 = ((short int (*)(val* self, val* p0))(var_method_finish->class->vft[COLOR_standard__kernel__Object___61d_61d]))(var_method_finish, var_other) /* == on <var_method_finish:nullable CallSite(CallSite)>*/;
+var73 = ((short int(*)(val* self, val* p0))(var_i->class->vft[COLOR_standard__kernel__Object___61d_61d]))(var_i, var_other); /* == on <var_i:nullable RuntimeVariable(RuntimeVariable)>*/
 }
-var191 = !var190;
-var188 = var191;
-goto RET_LABEL189;
-RET_LABEL189:(void)0;
+var74 = !var73;
+var71 = var74;
+goto RET_LABEL72;
+RET_LABEL72:(void)0;
 }
-var187 = var188;
+var70 = var71;
 }
-if (var187){
-var192 = NEW_standard__Array(&type_standard__Array__nit__RuntimeVariable);
-var193 = 1;
-{
-standard___standard__Array___with_capacity(var192, var193); /* Direct call array#Array#with_capacity on <var192:Array[RuntimeVariable]>*/
+if (unlikely(!var70)) {
+PRINT_ERROR("Runtime error: %s", "Assert failed");
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 2777);
+fatal_exit(1);
 }
-var_194 = var192;
 {
-standard___standard__AbstractArray___standard__abstract_collection__Sequence__push(var_194, var_it); /* Direct call array#AbstractArray#push on <var_194:Array[RuntimeVariable]>*/
+{ /* Inline scope#AForExpr#variables (self) on <self:AForExpr> */
+var77 = self->attrs[COLOR_nit__scope__AForExpr___variables].val; /* _variables on <self:AForExpr> */
+var75 = var77;
+RET_LABEL76:(void)0;
 }
-{
-var195 = ((val* (*)(val* self, val* p0, val* p1))(var_v->class->vft[COLOR_nit__abstract_compiler__AbstractCompilerVisitor__compile_callsite]))(var_v, var_method_finish, var_194) /* compile_callsite on <var_v:AbstractCompilerVisitor>*/;
 }
+if (var75 == NULL) {
+PRINT_ERROR("Runtime error: %s", "Receiver is null");
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 2778);
+fatal_exit(1);
 } else {
+var78 = standard___standard__SequenceRead___Collection__first(var75);
 }
-RET_LABEL:;
+{
+var79 = nit___nit__AbstractCompilerVisitor___variable(var_v, var78);
 }
-/* method abstract_compiler#AAssertExpr#stmt for (self: AAssertExpr, AbstractCompilerVisitor) */
+{
+nit___nit__AbstractCompilerVisitor___assign(var_v, var79, var_i); /* Direct call abstract_compiler#AbstractCompilerVisitor#assign on <var_v:AbstractCompilerVisitor>*/
+}
+} else {
+{
+{ /* Inline scope#AForExpr#variables (self) on <self:AForExpr> */
+var82 = self->attrs[COLOR_nit__scope__AForExpr___variables].val; /* _variables on <self:AForExpr> */
+var80 = var82;
+RET_LABEL81:(void)0;
+}
+}
+if (var80 == NULL) {
+PRINT_ERROR("Runtime error: %s", "Receiver is null");
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 2779);
+fatal_exit(1);
+} else {
+{ /* Inline array#AbstractArrayRead#length (var80) on <var80:nullable Array[Variable]> */
+if (unlikely(var80 == NULL)) {
+PRINT_ERROR("Runtime error: %s", "Receiver is null");
+PRINT_ERROR(" (%s:%d)\n", FILE_standard__array, 26);
+fatal_exit(1);
+}
+var85 = var80->attrs[COLOR_standard__array__AbstractArrayRead___length].l; /* _length on <var80:nullable Array[Variable]> */
+var83 = var85;
+RET_LABEL84:(void)0;
+}
+}
+{
+{ /* Inline kernel#Int#== (var83,2l) on <var83:Int> */
+var88 = var83 == 2l;
+var86 = var88;
+goto RET_LABEL87;
+RET_LABEL87:(void)0;
+}
+}
+if (var86){
+{
+{ /* Inline typing#AForExpr#method_key (self) on <self:AForExpr> */
+var91 = self->attrs[COLOR_nit__typing__AForExpr___method_key].val; /* _method_key on <self:AForExpr> */
+var89 = var91;
+RET_LABEL90:(void)0;
+}
+}
+var_key_meth = var89;
+if (var_key_meth == NULL) {
+var92 = 0; /* is null */
+} else {
+var92 = 1; /* arg is null and recv is not */
+}
+if (0) {
+{ /* Inline kernel#Object#!= (var_key_meth,((val*)NULL)) on <var_key_meth:nullable CallSite> */
+var_other = ((val*)NULL);
+{
+var95 = ((short int(*)(val* self, val* p0))(var_key_meth->class->vft[COLOR_standard__kernel__Object___61d_61d]))(var_key_meth, var_other); /* == on <var_key_meth:nullable CallSite(CallSite)>*/
+}
+var96 = !var95;
+var93 = var96;
+goto RET_LABEL94;
+RET_LABEL94:(void)0;
+}
+var92 = var93;
+}
+if (unlikely(!var92)) {
+PRINT_ERROR("Runtime error: %s", "Assert failed");
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 2781);
+fatal_exit(1);
+}
+var97 = NEW_standard__Array(&type_standard__Array__nit__RuntimeVariable);
+{
+standard___standard__Array___with_capacity(var97, 1l); /* Direct call array#Array#with_capacity on <var97:Array[RuntimeVariable]>*/
+}
+var_98 = var97;
+{
+standard___standard__AbstractArray___standard__abstract_collection__Sequence__push(var_98, var_it); /* Direct call array#AbstractArray#push on <var_98:Array[RuntimeVariable]>*/
+}
+{
+var99 = ((val*(*)(val* self, val* p0, val* p1))(var_v->class->vft[COLOR_nit__abstract_compiler__AbstractCompilerVisitor__compile_callsite]))(var_v, var_key_meth, var_98); /* compile_callsite on <var_v:AbstractCompilerVisitor>*/
+}
+var_i100 = var99;
+if (var_i100 == NULL) {
+var101 = 0; /* is null */
+} else {
+var101 = 1; /* arg is null and recv is not */
+}
+if (0) {
+{ /* Inline kernel#Object#!= (var_i100,((val*)NULL)) on <var_i100:nullable RuntimeVariable> */
+var_other = ((val*)NULL);
+{
+var104 = ((short int(*)(val* self, val* p0))(var_i100->class->vft[COLOR_standard__kernel__Object___61d_61d]))(var_i100, var_other); /* == on <var_i100:nullable RuntimeVariable(RuntimeVariable)>*/
+}
+var105 = !var104;
+var102 = var105;
+goto RET_LABEL103;
+RET_LABEL103:(void)0;
+}
+var101 = var102;
+}
+if (unlikely(!var101)) {
+PRINT_ERROR("Runtime error: %s", "Assert failed");
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 2783);
+fatal_exit(1);
+}
+{
+{ /* Inline scope#AForExpr#variables (self) on <self:AForExpr> */
+var108 = self->attrs[COLOR_nit__scope__AForExpr___variables].val; /* _variables on <self:AForExpr> */
+var106 = var108;
+RET_LABEL107:(void)0;
+}
+}
+if (var106 == NULL) {
+PRINT_ERROR("Runtime error: %s", "Receiver is null");
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 2784);
+fatal_exit(1);
+} else {
+var109 = standard___standard__Array___standard__abstract_collection__SequenceRead___91d_93d(var106, 0l);
+}
+{
+var110 = nit___nit__AbstractCompilerVisitor___variable(var_v, var109);
+}
+{
+nit___nit__AbstractCompilerVisitor___assign(var_v, var110, var_i100); /* Direct call abstract_compiler#AbstractCompilerVisitor#assign on <var_v:AbstractCompilerVisitor>*/
+}
+{
+{ /* Inline typing#AForExpr#method_item (self) on <self:AForExpr> */
+var113 = self->attrs[COLOR_nit__typing__AForExpr___method_item].val; /* _method_item on <self:AForExpr> */
+var111 = var113;
+RET_LABEL112:(void)0;
+}
+}
+var_item_meth114 = var111;
+if (var_item_meth114 == NULL) {
+var115 = 0; /* is null */
+} else {
+var115 = 1; /* arg is null and recv is not */
+}
+if (0) {
+{ /* Inline kernel#Object#!= (var_item_meth114,((val*)NULL)) on <var_item_meth114:nullable CallSite> */
+var_other = ((val*)NULL);
+{
+var118 = ((short int(*)(val* self, val* p0))(var_item_meth114->class->vft[COLOR_standard__kernel__Object___61d_61d]))(var_item_meth114, var_other); /* == on <var_item_meth114:nullable CallSite(CallSite)>*/
+}
+var119 = !var118;
+var116 = var119;
+goto RET_LABEL117;
+RET_LABEL117:(void)0;
+}
+var115 = var116;
+}
+if (unlikely(!var115)) {
+PRINT_ERROR("Runtime error: %s", "Assert failed");
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 2786);
+fatal_exit(1);
+}
+var120 = NEW_standard__Array(&type_standard__Array__nit__RuntimeVariable);
+{
+standard___standard__Array___with_capacity(var120, 1l); /* Direct call array#Array#with_capacity on <var120:Array[RuntimeVariable]>*/
+}
+var_121 = var120;
+{
+standard___standard__AbstractArray___standard__abstract_collection__Sequence__push(var_121, var_it); /* Direct call array#AbstractArray#push on <var_121:Array[RuntimeVariable]>*/
+}
+{
+var122 = ((val*(*)(val* self, val* p0, val* p1))(var_v->class->vft[COLOR_nit__abstract_compiler__AbstractCompilerVisitor__compile_callsite]))(var_v, var_item_meth114, var_121); /* compile_callsite on <var_v:AbstractCompilerVisitor>*/
+}
+var_i100 = var122;
+if (var_i100 == NULL) {
+var123 = 0; /* is null */
+} else {
+var123 = 1; /* arg is null and recv is not */
+}
+if (0) {
+{ /* Inline kernel#Object#!= (var_i100,((val*)NULL)) on <var_i100:nullable RuntimeVariable> */
+var_other = ((val*)NULL);
+{
+var126 = ((short int(*)(val* self, val* p0))(var_i100->class->vft[COLOR_standard__kernel__Object___61d_61d]))(var_i100, var_other); /* == on <var_i100:nullable RuntimeVariable(RuntimeVariable)>*/
+}
+var127 = !var126;
+var124 = var127;
+goto RET_LABEL125;
+RET_LABEL125:(void)0;
+}
+var123 = var124;
+}
+if (unlikely(!var123)) {
+PRINT_ERROR("Runtime error: %s", "Assert failed");
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 2788);
+fatal_exit(1);
+}
+{
+{ /* Inline scope#AForExpr#variables (self) on <self:AForExpr> */
+var130 = self->attrs[COLOR_nit__scope__AForExpr___variables].val; /* _variables on <self:AForExpr> */
+var128 = var130;
+RET_LABEL129:(void)0;
+}
+}
+if (var128 == NULL) {
+PRINT_ERROR("Runtime error: %s", "Receiver is null");
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 2789);
+fatal_exit(1);
+} else {
+var131 = standard___standard__Array___standard__abstract_collection__SequenceRead___91d_93d(var128, 1l);
+}
+{
+var132 = nit___nit__AbstractCompilerVisitor___variable(var_v, var131);
+}
+{
+nit___nit__AbstractCompilerVisitor___assign(var_v, var132, var_i100); /* Direct call abstract_compiler#AbstractCompilerVisitor#assign on <var_v:AbstractCompilerVisitor>*/
+}
+} else {
+PRINT_ERROR("Runtime error: %s", "Aborted");
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 2791);
+fatal_exit(1);
+}
+}
+{
+{ /* Inline parser_nodes#AForExpr#n_block (self) on <self:AForExpr> */
+var135 = self->attrs[COLOR_nit__parser_nodes__AForExpr___n_block].val; /* _n_block on <self:AForExpr> */
+var133 = var135;
+RET_LABEL134:(void)0;
+}
+}
+{
+nit___nit__AbstractCompilerVisitor___stmt(var_v, var133); /* Direct call abstract_compiler#AbstractCompilerVisitor#stmt on <var_v:AbstractCompilerVisitor>*/
+}
+{
+{ /* Inline scope#AForExpr#continue_mark (self) on <self:AForExpr> */
+var138 = self->attrs[COLOR_nit__scope__AForExpr___continue_mark].val; /* _continue_mark on <self:AForExpr> */
+var136 = var138;
+RET_LABEL137:(void)0;
+}
+}
+{
+nit___nit__AbstractCompilerVisitor___add_escape_label(var_v, var136); /* Direct call abstract_compiler#AbstractCompilerVisitor#add_escape_label on <var_v:AbstractCompilerVisitor>*/
+}
+{
+{ /* Inline typing#AForExpr#method_next (self) on <self:AForExpr> */
+var141 = self->attrs[COLOR_nit__typing__AForExpr___method_next].val; /* _method_next on <self:AForExpr> */
+var139 = var141;
+RET_LABEL140:(void)0;
+}
+}
+var_next_meth = var139;
+if (var_next_meth == NULL) {
+var142 = 0; /* is null */
+} else {
+var142 = 1; /* arg is null and recv is not */
+}
+if (0) {
+{ /* Inline kernel#Object#!= (var_next_meth,((val*)NULL)) on <var_next_meth:nullable CallSite> */
+var_other = ((val*)NULL);
+{
+var145 = ((short int(*)(val* self, val* p0))(var_next_meth->class->vft[COLOR_standard__kernel__Object___61d_61d]))(var_next_meth, var_other); /* == on <var_next_meth:nullable CallSite(CallSite)>*/
+}
+var146 = !var145;
+var143 = var146;
+goto RET_LABEL144;
+RET_LABEL144:(void)0;
+}
+var142 = var143;
+}
+if (unlikely(!var142)) {
+PRINT_ERROR("Runtime error: %s", "Assert failed");
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 2796);
+fatal_exit(1);
+}
+var147 = NEW_standard__Array(&type_standard__Array__nit__RuntimeVariable);
+{
+standard___standard__Array___with_capacity(var147, 1l); /* Direct call array#Array#with_capacity on <var147:Array[RuntimeVariable]>*/
+}
+var_148 = var147;
+{
+standard___standard__AbstractArray___standard__abstract_collection__Sequence__push(var_148, var_it); /* Direct call array#AbstractArray#push on <var_148:Array[RuntimeVariable]>*/
+}
+{
+var149 = ((val*(*)(val* self, val* p0, val* p1))(var_v->class->vft[COLOR_nit__abstract_compiler__AbstractCompilerVisitor__compile_callsite]))(var_v, var_next_meth, var_148); /* compile_callsite on <var_v:AbstractCompilerVisitor>*/
+}
+if (likely(varonce150!=NULL)) {
+var151 = varonce150;
+} else {
+var152 = "}";
+var153 = standard___standard__NativeString___to_s_with_length(var152, 1l);
+var151 = var153;
+varonce150 = var151;
+}
+{
+nit___nit__AbstractCompilerVisitor___add(var_v, var151); /* Direct call abstract_compiler#AbstractCompilerVisitor#add on <var_v:AbstractCompilerVisitor>*/
+}
+{
+{ /* Inline scope#AForExpr#break_mark (self) on <self:AForExpr> */
+var156 = self->attrs[COLOR_nit__scope__AForExpr___break_mark].val; /* _break_mark on <self:AForExpr> */
+var154 = var156;
+RET_LABEL155:(void)0;
+}
+}
+{
+nit___nit__AbstractCompilerVisitor___add_escape_label(var_v, var154); /* Direct call abstract_compiler#AbstractCompilerVisitor#add_escape_label on <var_v:AbstractCompilerVisitor>*/
+}
+{
+{ /* Inline typing#AForExpr#method_finish (self) on <self:AForExpr> */
+var159 = self->attrs[COLOR_nit__typing__AForExpr___method_finish].val; /* _method_finish on <self:AForExpr> */
+var157 = var159;
+RET_LABEL158:(void)0;
+}
+}
+var_method_finish = var157;
+if (var_method_finish == NULL) {
+var160 = 0; /* is null */
+} else {
+var160 = 1; /* arg is null and recv is not */
+}
+if (0) {
+{ /* Inline kernel#Object#!= (var_method_finish,((val*)NULL)) on <var_method_finish:nullable CallSite> */
+var_other = ((val*)NULL);
+{
+var163 = ((short int(*)(val* self, val* p0))(var_method_finish->class->vft[COLOR_standard__kernel__Object___61d_61d]))(var_method_finish, var_other); /* == on <var_method_finish:nullable CallSite(CallSite)>*/
+}
+var164 = !var163;
+var161 = var164;
+goto RET_LABEL162;
+RET_LABEL162:(void)0;
+}
+var160 = var161;
+}
+if (var160){
+var165 = NEW_standard__Array(&type_standard__Array__nit__RuntimeVariable);
+{
+standard___standard__Array___with_capacity(var165, 1l); /* Direct call array#Array#with_capacity on <var165:Array[RuntimeVariable]>*/
+}
+var_166 = var165;
+{
+standard___standard__AbstractArray___standard__abstract_collection__Sequence__push(var_166, var_it); /* Direct call array#AbstractArray#push on <var_166:Array[RuntimeVariable]>*/
+}
+{
+var167 = ((val*(*)(val* self, val* p0, val* p1))(var_v->class->vft[COLOR_nit__abstract_compiler__AbstractCompilerVisitor__compile_callsite]))(var_v, var_method_finish, var_166); /* compile_callsite on <var_v:AbstractCompilerVisitor>*/
+}
+} else {
+}
+RET_LABEL:;
+}
+/* method abstract_compiler#AAssertExpr#stmt for (self: AAssertExpr, AbstractCompilerVisitor) */
 void nit__abstract_compiler___AAssertExpr___AExpr__stmt(val* self, val* p0) {
 val* var_v /* var v: AbstractCompilerVisitor */;
 val* var /* : AbstractCompiler */;
@@ -872,64 +1397,56 @@ val* var16 /* : AExpr */;
 val* var18 /* : AExpr */;
 val* var19 /* : RuntimeVariable */;
 val* var_cond /* var cond: RuntimeVariable */;
+val* var20 /* : NativeArray[String] */;
 static val* varonce;
-val* var20 /* : String */;
-char* var21 /* : NativeString */;
-long var22 /* : Int */;
-val* var23 /* : FlatString */;
-static val* varonce24;
-val* var25 /* : String */;
-char* var26 /* : NativeString */;
-long var27 /* : Int */;
+static val* varonce21;
+val* var22 /* : String */;
+char* var23 /* : NativeString */;
+val* var24 /* : FlatString */;
+static val* varonce25;
+val* var26 /* : String */;
+char* var27 /* : NativeString */;
 val* var28 /* : FlatString */;
-val* var29 /* : Array[Object] */;
-long var30 /* : Int */;
-val* var31 /* : NativeArray[Object] */;
-val* var32 /* : String */;
+val* var29 /* : String */;
+val* var30 /* : String */;
+val* var31 /* : nullable AExpr */;
 val* var33 /* : nullable AExpr */;
-val* var35 /* : nullable AExpr */;
+val* var34 /* : nullable TId */;
 val* var36 /* : nullable TId */;
-val* var38 /* : nullable TId */;
 val* var_nid /* var nid: nullable TId */;
-val* var39 /* : null */;
+short int var37 /* : Bool */;
+short int var38 /* : Bool */;
+val* var_other /* var other: nullable Object */;
 short int var40 /* : Bool */;
 short int var41 /* : Bool */;
-val* var_other /* var other: nullable Object */;
-short int var43 /* : Bool */;
-short int var44 /* : Bool */;
-static val* varonce45;
-val* var46 /* : String */;
-char* var47 /* : NativeString */;
-long var48 /* : Int */;
-val* var49 /* : FlatString */;
-val* var50 /* : String */;
-static val* varonce51;
+val* var43 /* : NativeArray[String] */;
+static val* varonce42;
+static val* varonce44;
+val* var45 /* : String */;
+char* var46 /* : NativeString */;
+val* var47 /* : FlatString */;
+static val* varonce48;
+val* var49 /* : String */;
+char* var50 /* : NativeString */;
+val* var51 /* : FlatString */;
 val* var52 /* : String */;
-char* var53 /* : NativeString */;
-long var54 /* : Int */;
-val* var55 /* : FlatString */;
-val* var56 /* : Array[Object] */;
-long var57 /* : Int */;
-val* var58 /* : NativeArray[Object] */;
+val* var53 /* : String */;
+static val* varonce54;
+val* var55 /* : String */;
+char* var56 /* : NativeString */;
+val* var57 /* : FlatString */;
+static val* varonce58;
 val* var59 /* : String */;
-static val* varonce60;
-val* var61 /* : String */;
-char* var62 /* : NativeString */;
-long var63 /* : Int */;
-val* var64 /* : FlatString */;
-static val* varonce65;
-val* var66 /* : String */;
-char* var67 /* : NativeString */;
-long var68 /* : Int */;
-val* var69 /* : FlatString */;
+char* var60 /* : NativeString */;
+val* var61 /* : FlatString */;
 var_v = p0;
 {
 { /* Inline abstract_compiler#AbstractCompilerVisitor#compiler (var_v) on <var_v:AbstractCompilerVisitor> */
 var2 = var_v->attrs[COLOR_nit__abstract_compiler__AbstractCompilerVisitor___compiler].val; /* _compiler on <var_v:AbstractCompilerVisitor> */
 if (unlikely(var2 == NULL)) {
 PRINT_ERROR("Runtime error: %s", "Uninitialized attribute _compiler");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 1059);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 1102);
+fatal_exit(1);
 }
 var = var2;
 RET_LABEL1:(void)0;
@@ -940,8 +1457,8 @@ RET_LABEL1:(void)0;
 var5 = var->attrs[COLOR_nit__abstract_compiler__AbstractCompiler___modelbuilder].val; /* _modelbuilder on <var:AbstractCompiler> */
 if (unlikely(var5 == NULL)) {
 PRINT_ERROR("Runtime error: %s", "Uninitialized attribute _modelbuilder");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 481);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 522);
+fatal_exit(1);
 }
 var3 = var5;
 RET_LABEL4:(void)0;
@@ -953,7 +1470,7 @@ var8 = var3->attrs[COLOR_nit__modelbuilder_base__ModelBuilder___toolcontext].val
 if (unlikely(var8 == NULL)) {
 PRINT_ERROR("Runtime error: %s", "Uninitialized attribute _toolcontext");
 PRINT_ERROR(" (%s:%d)\n", FILE_nit__modelbuilder_base, 47);
-show_backtrace(1);
+fatal_exit(1);
 }
 var6 = var8;
 RET_LABEL7:(void)0;
@@ -964,8 +1481,8 @@ RET_LABEL7:(void)0;
 var11 = var6->attrs[COLOR_nit__abstract_compiler__ToolContext___opt_no_check_assert].val; /* _opt_no_check_assert on <var6:ToolContext> */
 if (unlikely(var11 == NULL)) {
 PRINT_ERROR("Runtime error: %s", "Uninitialized attribute _opt_no_check_assert");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 51);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 52);
+fatal_exit(1);
 }
 var9 = var11;
 RET_LABEL10:(void)0;
@@ -978,7 +1495,7 @@ var12 = var14;
 RET_LABEL13:(void)0;
 }
 }
-var15 = ((struct instance_standard__Bool*)var12)->value; /* autounbox from nullable Object to Bool */;
+var15 = (short int)((long)(var12)>>2);
 if (var15){
 goto RET_LABEL;
 } else {
@@ -988,8 +1505,8 @@ goto RET_LABEL;
 var18 = self->attrs[COLOR_nit__parser_nodes__AAssertExpr___n_expr].val; /* _n_expr on <self:AAssertExpr> */
 if (unlikely(var18 == NULL)) {
 PRINT_ERROR("Runtime error: %s", "Uninitialized attribute _n_expr");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__parser_nodes, 1758);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__parser_nodes, 1978);
+fatal_exit(1);
 }
 var16 = var18;
 RET_LABEL17:(void)0;
@@ -999,142 +1516,136 @@ RET_LABEL17:(void)0;
 var19 = nit___nit__AbstractCompilerVisitor___expr_bool(var_v, var16);
 }
 var_cond = var19;
-if (varonce) {
-var20 = varonce;
+if (unlikely(varonce==NULL)) {
+var20 = NEW_standard__NativeArray(3l, &type_standard__NativeArray__standard__String);
+if (likely(varonce21!=NULL)) {
+var22 = varonce21;
 } else {
-var21 = "if (unlikely(!";
-var22 = 14;
-var23 = standard___standard__NativeString___to_s_with_length(var21, var22);
-var20 = var23;
-varonce = var20;
+var23 = "if (unlikely(!";
+var24 = standard___standard__NativeString___to_s_with_length(var23, 14l);
+var22 = var24;
+varonce21 = var22;
 }
-if (varonce24) {
-var25 = varonce24;
+((struct instance_standard__NativeArray*)var20)->values[0]=var22;
+if (likely(varonce25!=NULL)) {
+var26 = varonce25;
 } else {
-var26 = ")) {";
-var27 = 4;
-var28 = standard___standard__NativeString___to_s_with_length(var26, var27);
-var25 = var28;
-varonce24 = var25;
+var27 = ")) {";
+var28 = standard___standard__NativeString___to_s_with_length(var27, 4l);
+var26 = var28;
+varonce25 = var26;
 }
-var29 = NEW_standard__Array(&type_standard__Array__standard__Object);
-{ /* var29 = array_instance Array[Object] */
-var30 = 3;
-var31 = NEW_standard__NativeArray(var30, &type_standard__NativeArray__standard__Object);
-((struct instance_standard__NativeArray*)var31)->values[0] = (val*) var20;
-((struct instance_standard__NativeArray*)var31)->values[1] = (val*) var_cond;
-((struct instance_standard__NativeArray*)var31)->values[2] = (val*) var25;
-{
-((void (*)(val* self, val* p0, long p1))(var29->class->vft[COLOR_standard__array__Array__with_native]))(var29, var31, var30) /* with_native on <var29:Array[Object]>*/;
+((struct instance_standard__NativeArray*)var20)->values[2]=var26;
+} else {
+var20 = varonce;
+varonce = NULL;
 }
+{
+var29 = ((val*(*)(val* self))(var_cond->class->vft[COLOR_standard__string__Object__to_s]))(var_cond); /* to_s on <var_cond:RuntimeVariable>*/
 }
+((struct instance_standard__NativeArray*)var20)->values[1]=var29;
 {
-var32 = ((val* (*)(val* self))(var29->class->vft[COLOR_standard__string__Object__to_s]))(var29) /* to_s on <var29:Array[Object]>*/;
+var30 = ((val*(*)(val* self))(var20->class->vft[COLOR_standard__string__NativeArray__native_to_s]))(var20); /* native_to_s on <var20:NativeArray[String]>*/
 }
+varonce = var20;
 {
-nit___nit__AbstractCompilerVisitor___add(var_v, var32); /* Direct call abstract_compiler#AbstractCompilerVisitor#add on <var_v:AbstractCompilerVisitor>*/
+nit___nit__AbstractCompilerVisitor___add(var_v, var30); /* Direct call abstract_compiler#AbstractCompilerVisitor#add on <var_v:AbstractCompilerVisitor>*/
 }
 {
 { /* Inline parser_nodes#AAssertExpr#n_else (self) on <self:AAssertExpr> */
-var35 = self->attrs[COLOR_nit__parser_nodes__AAssertExpr___n_else].val; /* _n_else on <self:AAssertExpr> */
-var33 = var35;
-RET_LABEL34:(void)0;
+var33 = self->attrs[COLOR_nit__parser_nodes__AAssertExpr___n_else].val; /* _n_else on <self:AAssertExpr> */
+var31 = var33;
+RET_LABEL32:(void)0;
 }
 }
 {
-nit___nit__AbstractCompilerVisitor___stmt(var_v, var33); /* Direct call abstract_compiler#AbstractCompilerVisitor#stmt on <var_v:AbstractCompilerVisitor>*/
+nit___nit__AbstractCompilerVisitor___stmt(var_v, var31); /* Direct call abstract_compiler#AbstractCompilerVisitor#stmt on <var_v:AbstractCompilerVisitor>*/
 }
 {
 { /* Inline parser_nodes#AAssertExpr#n_id (self) on <self:AAssertExpr> */
-var38 = self->attrs[COLOR_nit__parser_nodes__AAssertExpr___n_id].val; /* _n_id on <self:AAssertExpr> */
-var36 = var38;
-RET_LABEL37:(void)0;
+var36 = self->attrs[COLOR_nit__parser_nodes__AAssertExpr___n_id].val; /* _n_id on <self:AAssertExpr> */
+var34 = var36;
+RET_LABEL35:(void)0;
 }
 }
-var_nid = var36;
-var39 = NULL;
+var_nid = var34;
 if (var_nid == NULL) {
-var40 = 0; /* is null */
+var37 = 0; /* is null */
 } else {
-var40 = 1; /* arg is null and recv is not */
+var37 = 1; /* arg is null and recv is not */
 }
 if (0) {
-{ /* Inline kernel#Object#!= (var_nid,var39) on <var_nid:nullable TId> */
-var_other = var39;
+{ /* Inline kernel#Object#!= (var_nid,((val*)NULL)) on <var_nid:nullable TId> */
+var_other = ((val*)NULL);
 {
-var43 = ((short int (*)(val* self, val* p0))(var_nid->class->vft[COLOR_standard__kernel__Object___61d_61d]))(var_nid, var_other) /* == on <var_nid:nullable TId(TId)>*/;
+var40 = ((short int(*)(val* self, val* p0))(var_nid->class->vft[COLOR_standard__kernel__Object___61d_61d]))(var_nid, var_other); /* == on <var_nid:nullable TId(TId)>*/
 }
-var44 = !var43;
-var41 = var44;
-goto RET_LABEL42;
-RET_LABEL42:(void)0;
+var41 = !var40;
+var38 = var41;
+goto RET_LABEL39;
+RET_LABEL39:(void)0;
 }
-var40 = var41;
+var37 = var38;
 }
-if (var40){
-if (varonce45) {
-var46 = varonce45;
+if (var37){
+if (unlikely(varonce42==NULL)) {
+var43 = NEW_standard__NativeArray(3l, &type_standard__NativeArray__standard__String);
+if (likely(varonce44!=NULL)) {
+var45 = varonce44;
 } else {
-var47 = "Assert \'";
-var48 = 8;
-var49 = standard___standard__NativeString___to_s_with_length(var47, var48);
-var46 = var49;
-varonce45 = var46;
+var46 = "Assert \'";
+var47 = standard___standard__NativeString___to_s_with_length(var46, 8l);
+var45 = var47;
+varonce44 = var45;
 }
-{
-var50 = nit__lexer_work___Token___text(var_nid);
+((struct instance_standard__NativeArray*)var43)->values[0]=var45;
+if (likely(varonce48!=NULL)) {
+var49 = varonce48;
+} else {
+var50 = "\' failed";
+var51 = standard___standard__NativeString___to_s_with_length(var50, 8l);
+var49 = var51;
+varonce48 = var49;
 }
-if (varonce51) {
-var52 = varonce51;
+((struct instance_standard__NativeArray*)var43)->values[2]=var49;
 } else {
-var53 = "\' failed";
-var54 = 8;
-var55 = standard___standard__NativeString___to_s_with_length(var53, var54);
-var52 = var55;
-varonce51 = var52;
+var43 = varonce42;
+varonce42 = NULL;
 }
-var56 = NEW_standard__Array(&type_standard__Array__standard__Object);
-{ /* var56 = array_instance Array[Object] */
-var57 = 3;
-var58 = NEW_standard__NativeArray(var57, &type_standard__NativeArray__standard__Object);
-((struct instance_standard__NativeArray*)var58)->values[0] = (val*) var46;
-((struct instance_standard__NativeArray*)var58)->values[1] = (val*) var50;
-((struct instance_standard__NativeArray*)var58)->values[2] = (val*) var52;
 {
-((void (*)(val* self, val* p0, long p1))(var56->class->vft[COLOR_standard__array__Array__with_native]))(var56, var58, var57) /* with_native on <var56:Array[Object]>*/;
-}
+var52 = nit__lexer_work___Token___text(var_nid);
 }
+((struct instance_standard__NativeArray*)var43)->values[1]=var52;
 {
-var59 = ((val* (*)(val* self))(var56->class->vft[COLOR_standard__string__Object__to_s]))(var56) /* to_s on <var56:Array[Object]>*/;
+var53 = ((val*(*)(val* self))(var43->class->vft[COLOR_standard__string__NativeArray__native_to_s]))(var43); /* native_to_s on <var43:NativeArray[String]>*/
 }
+varonce42 = var43;
 {
-nit___nit__AbstractCompilerVisitor___add_abort(var_v, var59); /* Direct call abstract_compiler#AbstractCompilerVisitor#add_abort on <var_v:AbstractCompilerVisitor>*/
+nit___nit__AbstractCompilerVisitor___add_abort(var_v, var53); /* Direct call abstract_compiler#AbstractCompilerVisitor#add_abort on <var_v:AbstractCompilerVisitor>*/
 }
 } else {
-if (varonce60) {
-var61 = varonce60;
+if (likely(varonce54!=NULL)) {
+var55 = varonce54;
 } else {
-var62 = "Assert failed";
-var63 = 13;
-var64 = standard___standard__NativeString___to_s_with_length(var62, var63);
-var61 = var64;
-varonce60 = var61;
+var56 = "Assert failed";
+var57 = standard___standard__NativeString___to_s_with_length(var56, 13l);
+var55 = var57;
+varonce54 = var55;
 }
 {
-nit___nit__AbstractCompilerVisitor___add_abort(var_v, var61); /* Direct call abstract_compiler#AbstractCompilerVisitor#add_abort on <var_v:AbstractCompilerVisitor>*/
+nit___nit__AbstractCompilerVisitor___add_abort(var_v, var55); /* Direct call abstract_compiler#AbstractCompilerVisitor#add_abort on <var_v:AbstractCompilerVisitor>*/
 }
 }
-if (varonce65) {
-var66 = varonce65;
+if (likely(varonce58!=NULL)) {
+var59 = varonce58;
 } else {
-var67 = "}";
-var68 = 1;
-var69 = standard___standard__NativeString___to_s_with_length(var67, var68);
-var66 = var69;
-varonce65 = var66;
+var60 = "}";
+var61 = standard___standard__NativeString___to_s_with_length(var60, 1l);
+var59 = var61;
+varonce58 = var59;
 }
 {
-nit___nit__AbstractCompilerVisitor___add(var_v, var66); /* Direct call abstract_compiler#AbstractCompilerVisitor#add on <var_v:AbstractCompilerVisitor>*/
+nit___nit__AbstractCompilerVisitor___add(var_v, var59); /* Direct call abstract_compiler#AbstractCompilerVisitor#add on <var_v:AbstractCompilerVisitor>*/
 }
 RET_LABEL:;
 }
@@ -1150,57 +1661,51 @@ val* var5 /* : AExpr */;
 val* var7 /* : AExpr */;
 val* var8 /* : RuntimeVariable */;
 val* var_i1 /* var i1: RuntimeVariable */;
+val* var9 /* : NativeArray[String] */;
 static val* varonce;
-val* var9 /* : String */;
-char* var10 /* : NativeString */;
-long var11 /* : Int */;
-val* var12 /* : FlatString */;
-static val* varonce13;
-val* var14 /* : String */;
-char* var15 /* : NativeString */;
-long var16 /* : Int */;
+static val* varonce10;
+val* var11 /* : String */;
+char* var12 /* : NativeString */;
+val* var13 /* : FlatString */;
+static val* varonce14;
+val* var15 /* : String */;
+char* var16 /* : NativeString */;
 val* var17 /* : FlatString */;
-val* var18 /* : Array[Object] */;
-long var19 /* : Int */;
-val* var20 /* : NativeArray[Object] */;
-val* var21 /* : String */;
+val* var18 /* : String */;
+val* var19 /* : String */;
+val* var21 /* : NativeArray[String] */;
+static val* varonce20;
 static val* varonce22;
 val* var23 /* : String */;
 char* var24 /* : NativeString */;
-long var25 /* : Int */;
-val* var26 /* : FlatString */;
-val* var27 /* : Array[Object] */;
-long var28 /* : Int */;
-val* var29 /* : NativeArray[Object] */;
-val* var30 /* : String */;
-static val* varonce31;
-val* var32 /* : String */;
-char* var33 /* : NativeString */;
-long var34 /* : Int */;
-val* var35 /* : FlatString */;
-val* var36 /* : AExpr */;
-val* var38 /* : AExpr */;
-val* var39 /* : RuntimeVariable */;
+val* var25 /* : FlatString */;
+val* var26 /* : String */;
+val* var27 /* : String */;
+static val* varonce28;
+val* var29 /* : String */;
+char* var30 /* : NativeString */;
+val* var31 /* : FlatString */;
+val* var32 /* : AExpr */;
+val* var34 /* : AExpr */;
+val* var35 /* : RuntimeVariable */;
 val* var_i2 /* var i2: RuntimeVariable */;
-static val* varonce40;
-val* var41 /* : String */;
-char* var42 /* : NativeString */;
-long var43 /* : Int */;
-val* var44 /* : FlatString */;
-static val* varonce45;
+val* var37 /* : NativeArray[String] */;
+static val* varonce36;
+static val* varonce38;
+val* var39 /* : String */;
+char* var40 /* : NativeString */;
+val* var41 /* : FlatString */;
+static val* varonce42;
+val* var43 /* : String */;
+char* var44 /* : NativeString */;
+val* var45 /* : FlatString */;
 val* var46 /* : String */;
-char* var47 /* : NativeString */;
-long var48 /* : Int */;
-val* var49 /* : FlatString */;
-val* var50 /* : Array[Object] */;
-long var51 /* : Int */;
-val* var52 /* : NativeArray[Object] */;
-val* var53 /* : String */;
-static val* varonce54;
-val* var55 /* : String */;
-char* var56 /* : NativeString */;
-long var57 /* : Int */;
-val* var58 /* : FlatString */;
+val* var47 /* : String */;
+val* var48 /* : String */;
+static val* varonce49;
+val* var50 /* : String */;
+char* var51 /* : NativeString */;
+val* var52 /* : FlatString */;
 var_v = p0;
 {
 { /* Inline typing#AExpr#mtype (self) on <self:AOrExpr> */
@@ -1211,8 +1716,8 @@ RET_LABEL2:(void)0;
 }
 if (unlikely(var1 == NULL)) {
 PRINT_ERROR("Runtime error: %s", "Cast failed");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 2629);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 2830);
+fatal_exit(1);
 }
 {
 var4 = nit___nit__AbstractCompilerVisitor___new_var(var_v, var1);
@@ -1223,8 +1728,8 @@ var_res = var4;
 var7 = self->attrs[COLOR_nit__parser_nodes__ABinBoolExpr___n_expr].val; /* _n_expr on <self:AOrExpr> */
 if (unlikely(var7 == NULL)) {
 PRINT_ERROR("Runtime error: %s", "Uninitialized attribute _n_expr");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__parser_nodes, 1823);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__parser_nodes, 2053);
+fatal_exit(1);
 }
 var5 = var7;
 RET_LABEL6:(void)0;
@@ -1234,141 +1739,143 @@ RET_LABEL6:(void)0;
 var8 = nit___nit__AbstractCompilerVisitor___expr_bool(var_v, var5);
 }
 var_i1 = var8;
-if (varonce) {
-var9 = varonce;
+if (unlikely(varonce==NULL)) {
+var9 = NEW_standard__NativeArray(3l, &type_standard__NativeArray__standard__String);
+if (likely(varonce10!=NULL)) {
+var11 = varonce10;
 } else {
-var10 = "if (";
-var11 = 4;
-var12 = standard___standard__NativeString___to_s_with_length(var10, var11);
-var9 = var12;
-varonce = var9;
+var12 = "if (";
+var13 = standard___standard__NativeString___to_s_with_length(var12, 4l);
+var11 = var13;
+varonce10 = var11;
 }
-if (varonce13) {
-var14 = varonce13;
+((struct instance_standard__NativeArray*)var9)->values[0]=var11;
+if (likely(varonce14!=NULL)) {
+var15 = varonce14;
 } else {
-var15 = ") {";
-var16 = 3;
-var17 = standard___standard__NativeString___to_s_with_length(var15, var16);
-var14 = var17;
-varonce13 = var14;
+var16 = ") {";
+var17 = standard___standard__NativeString___to_s_with_length(var16, 3l);
+var15 = var17;
+varonce14 = var15;
 }
-var18 = NEW_standard__Array(&type_standard__Array__standard__Object);
-{ /* var18 = array_instance Array[Object] */
-var19 = 3;
-var20 = NEW_standard__NativeArray(var19, &type_standard__NativeArray__standard__Object);
-((struct instance_standard__NativeArray*)var20)->values[0] = (val*) var9;
-((struct instance_standard__NativeArray*)var20)->values[1] = (val*) var_i1;
-((struct instance_standard__NativeArray*)var20)->values[2] = (val*) var14;
-{
-((void (*)(val* self, val* p0, long p1))(var18->class->vft[COLOR_standard__array__Array__with_native]))(var18, var20, var19) /* with_native on <var18:Array[Object]>*/;
+((struct instance_standard__NativeArray*)var9)->values[2]=var15;
+} else {
+var9 = varonce;
+varonce = NULL;
 }
+{
+var18 = ((val*(*)(val* self))(var_i1->class->vft[COLOR_standard__string__Object__to_s]))(var_i1); /* to_s on <var_i1:RuntimeVariable>*/
 }
+((struct instance_standard__NativeArray*)var9)->values[1]=var18;
 {
-var21 = ((val* (*)(val* self))(var18->class->vft[COLOR_standard__string__Object__to_s]))(var18) /* to_s on <var18:Array[Object]>*/;
+var19 = ((val*(*)(val* self))(var9->class->vft[COLOR_standard__string__NativeArray__native_to_s]))(var9); /* native_to_s on <var9:NativeArray[String]>*/
 }
+varonce = var9;
 {
-nit___nit__AbstractCompilerVisitor___add(var_v, var21); /* Direct call abstract_compiler#AbstractCompilerVisitor#add on <var_v:AbstractCompilerVisitor>*/
+nit___nit__AbstractCompilerVisitor___add(var_v, var19); /* Direct call abstract_compiler#AbstractCompilerVisitor#add on <var_v:AbstractCompilerVisitor>*/
 }
-if (varonce22) {
+if (unlikely(varonce20==NULL)) {
+var21 = NEW_standard__NativeArray(2l, &type_standard__NativeArray__standard__String);
+if (likely(varonce22!=NULL)) {
 var23 = varonce22;
 } else {
 var24 = " = 1;";
-var25 = 5;
-var26 = standard___standard__NativeString___to_s_with_length(var24, var25);
-var23 = var26;
+var25 = standard___standard__NativeString___to_s_with_length(var24, 5l);
+var23 = var25;
 varonce22 = var23;
 }
-var27 = NEW_standard__Array(&type_standard__Array__standard__Object);
-{ /* var27 = array_instance Array[Object] */
-var28 = 2;
-var29 = NEW_standard__NativeArray(var28, &type_standard__NativeArray__standard__Object);
-((struct instance_standard__NativeArray*)var29)->values[0] = (val*) var_res;
-((struct instance_standard__NativeArray*)var29)->values[1] = (val*) var23;
-{
-((void (*)(val* self, val* p0, long p1))(var27->class->vft[COLOR_standard__array__Array__with_native]))(var27, var29, var28) /* with_native on <var27:Array[Object]>*/;
+((struct instance_standard__NativeArray*)var21)->values[1]=var23;
+} else {
+var21 = varonce20;
+varonce20 = NULL;
 }
+{
+var26 = ((val*(*)(val* self))(var_res->class->vft[COLOR_standard__string__Object__to_s]))(var_res); /* to_s on <var_res:RuntimeVariable>*/
 }
+((struct instance_standard__NativeArray*)var21)->values[0]=var26;
 {
-var30 = ((val* (*)(val* self))(var27->class->vft[COLOR_standard__string__Object__to_s]))(var27) /* to_s on <var27:Array[Object]>*/;
+var27 = ((val*(*)(val* self))(var21->class->vft[COLOR_standard__string__NativeArray__native_to_s]))(var21); /* native_to_s on <var21:NativeArray[String]>*/
 }
+varonce20 = var21;
 {
-nit___nit__AbstractCompilerVisitor___add(var_v, var30); /* Direct call abstract_compiler#AbstractCompilerVisitor#add on <var_v:AbstractCompilerVisitor>*/
+nit___nit__AbstractCompilerVisitor___add(var_v, var27); /* Direct call abstract_compiler#AbstractCompilerVisitor#add on <var_v:AbstractCompilerVisitor>*/
 }
-if (varonce31) {
-var32 = varonce31;
+if (likely(varonce28!=NULL)) {
+var29 = varonce28;
 } else {
-var33 = "} else {";
-var34 = 8;
-var35 = standard___standard__NativeString___to_s_with_length(var33, var34);
-var32 = var35;
-varonce31 = var32;
+var30 = "} else {";
+var31 = standard___standard__NativeString___to_s_with_length(var30, 8l);
+var29 = var31;
+varonce28 = var29;
 }
 {
-nit___nit__AbstractCompilerVisitor___add(var_v, var32); /* Direct call abstract_compiler#AbstractCompilerVisitor#add on <var_v:AbstractCompilerVisitor>*/
+nit___nit__AbstractCompilerVisitor___add(var_v, var29); /* Direct call abstract_compiler#AbstractCompilerVisitor#add on <var_v:AbstractCompilerVisitor>*/
 }
 {
 { /* Inline parser_nodes#ABinBoolExpr#n_expr2 (self) on <self:AOrExpr> */
-var38 = self->attrs[COLOR_nit__parser_nodes__ABinBoolExpr___n_expr2].val; /* _n_expr2 on <self:AOrExpr> */
-if (unlikely(var38 == NULL)) {
+var34 = self->attrs[COLOR_nit__parser_nodes__ABinBoolExpr___n_expr2].val; /* _n_expr2 on <self:AOrExpr> */
+if (unlikely(var34 == NULL)) {
 PRINT_ERROR("Runtime error: %s", "Uninitialized attribute _n_expr2");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__parser_nodes, 1826);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__parser_nodes, 2059);
+fatal_exit(1);
 }
-var36 = var38;
-RET_LABEL37:(void)0;
+var32 = var34;
+RET_LABEL33:(void)0;
 }
 }
 {
-var39 = nit___nit__AbstractCompilerVisitor___expr_bool(var_v, var36);
+var35 = nit___nit__AbstractCompilerVisitor___expr_bool(var_v, var32);
 }
-var_i2 = var39;
-if (varonce40) {
-var41 = varonce40;
+var_i2 = var35;
+if (unlikely(varonce36==NULL)) {
+var37 = NEW_standard__NativeArray(4l, &type_standard__NativeArray__standard__String);
+if (likely(varonce38!=NULL)) {
+var39 = varonce38;
 } else {
-var42 = " = ";
-var43 = 3;
-var44 = standard___standard__NativeString___to_s_with_length(var42, var43);
-var41 = var44;
-varonce40 = var41;
+var40 = " = ";
+var41 = standard___standard__NativeString___to_s_with_length(var40, 3l);
+var39 = var41;
+varonce38 = var39;
 }
-if (varonce45) {
-var46 = varonce45;
+((struct instance_standard__NativeArray*)var37)->values[1]=var39;
+if (likely(varonce42!=NULL)) {
+var43 = varonce42;
 } else {
-var47 = ";";
-var48 = 1;
-var49 = standard___standard__NativeString___to_s_with_length(var47, var48);
-var46 = var49;
-varonce45 = var46;
+var44 = ";";
+var45 = standard___standard__NativeString___to_s_with_length(var44, 1l);
+var43 = var45;
+varonce42 = var43;
+}
+((struct instance_standard__NativeArray*)var37)->values[3]=var43;
+} else {
+var37 = varonce36;
+varonce36 = NULL;
 }
-var50 = NEW_standard__Array(&type_standard__Array__standard__Object);
-{ /* var50 = array_instance Array[Object] */
-var51 = 4;
-var52 = NEW_standard__NativeArray(var51, &type_standard__NativeArray__standard__Object);
-((struct instance_standard__NativeArray*)var52)->values[0] = (val*) var_res;
-((struct instance_standard__NativeArray*)var52)->values[1] = (val*) var41;
-((struct instance_standard__NativeArray*)var52)->values[2] = (val*) var_i2;
-((struct instance_standard__NativeArray*)var52)->values[3] = (val*) var46;
 {
-((void (*)(val* self, val* p0, long p1))(var50->class->vft[COLOR_standard__array__Array__with_native]))(var50, var52, var51) /* with_native on <var50:Array[Object]>*/;
+var46 = ((val*(*)(val* self))(var_res->class->vft[COLOR_standard__string__Object__to_s]))(var_res); /* to_s on <var_res:RuntimeVariable>*/
 }
+((struct instance_standard__NativeArray*)var37)->values[0]=var46;
+{
+var47 = ((val*(*)(val* self))(var_i2->class->vft[COLOR_standard__string__Object__to_s]))(var_i2); /* to_s on <var_i2:RuntimeVariable>*/
 }
+((struct instance_standard__NativeArray*)var37)->values[2]=var47;
 {
-var53 = ((val* (*)(val* self))(var50->class->vft[COLOR_standard__string__Object__to_s]))(var50) /* to_s on <var50:Array[Object]>*/;
+var48 = ((val*(*)(val* self))(var37->class->vft[COLOR_standard__string__NativeArray__native_to_s]))(var37); /* native_to_s on <var37:NativeArray[String]>*/
 }
+varonce36 = var37;
 {
-nit___nit__AbstractCompilerVisitor___add(var_v, var53); /* Direct call abstract_compiler#AbstractCompilerVisitor#add on <var_v:AbstractCompilerVisitor>*/
+nit___nit__AbstractCompilerVisitor___add(var_v, var48); /* Direct call abstract_compiler#AbstractCompilerVisitor#add on <var_v:AbstractCompilerVisitor>*/
 }
-if (varonce54) {
-var55 = varonce54;
+if (likely(varonce49!=NULL)) {
+var50 = varonce49;
 } else {
-var56 = "}";
-var57 = 1;
-var58 = standard___standard__NativeString___to_s_with_length(var56, var57);
-var55 = var58;
-varonce54 = var55;
+var51 = "}";
+var52 = standard___standard__NativeString___to_s_with_length(var51, 1l);
+var50 = var52;
+varonce49 = var50;
 }
 {
-nit___nit__AbstractCompilerVisitor___add(var_v, var55); /* Direct call abstract_compiler#AbstractCompilerVisitor#add on <var_v:AbstractCompilerVisitor>*/
+nit___nit__AbstractCompilerVisitor___add(var_v, var50); /* Direct call abstract_compiler#AbstractCompilerVisitor#add on <var_v:AbstractCompilerVisitor>*/
 }
 var = var_res;
 goto RET_LABEL;
@@ -1387,57 +1894,51 @@ val* var5 /* : AExpr */;
 val* var7 /* : AExpr */;
 val* var8 /* : RuntimeVariable */;
 val* var_i1 /* var i1: RuntimeVariable */;
+val* var9 /* : NativeArray[String] */;
 static val* varonce;
-val* var9 /* : String */;
-char* var10 /* : NativeString */;
-long var11 /* : Int */;
-val* var12 /* : FlatString */;
-static val* varonce13;
-val* var14 /* : String */;
-char* var15 /* : NativeString */;
-long var16 /* : Int */;
+static val* varonce10;
+val* var11 /* : String */;
+char* var12 /* : NativeString */;
+val* var13 /* : FlatString */;
+static val* varonce14;
+val* var15 /* : String */;
+char* var16 /* : NativeString */;
 val* var17 /* : FlatString */;
-val* var18 /* : Array[Object] */;
-long var19 /* : Int */;
-val* var20 /* : NativeArray[Object] */;
-val* var21 /* : String */;
+val* var18 /* : String */;
+val* var19 /* : String */;
+val* var21 /* : NativeArray[String] */;
+static val* varonce20;
 static val* varonce22;
 val* var23 /* : String */;
 char* var24 /* : NativeString */;
-long var25 /* : Int */;
-val* var26 /* : FlatString */;
-val* var27 /* : Array[Object] */;
-long var28 /* : Int */;
-val* var29 /* : NativeArray[Object] */;
-val* var30 /* : String */;
-static val* varonce31;
-val* var32 /* : String */;
-char* var33 /* : NativeString */;
-long var34 /* : Int */;
-val* var35 /* : FlatString */;
-val* var36 /* : AExpr */;
-val* var38 /* : AExpr */;
-val* var39 /* : RuntimeVariable */;
+val* var25 /* : FlatString */;
+val* var26 /* : String */;
+val* var27 /* : String */;
+static val* varonce28;
+val* var29 /* : String */;
+char* var30 /* : NativeString */;
+val* var31 /* : FlatString */;
+val* var32 /* : AExpr */;
+val* var34 /* : AExpr */;
+val* var35 /* : RuntimeVariable */;
 val* var_i2 /* var i2: RuntimeVariable */;
-static val* varonce40;
-val* var41 /* : String */;
-char* var42 /* : NativeString */;
-long var43 /* : Int */;
-val* var44 /* : FlatString */;
-static val* varonce45;
+val* var37 /* : NativeArray[String] */;
+static val* varonce36;
+static val* varonce38;
+val* var39 /* : String */;
+char* var40 /* : NativeString */;
+val* var41 /* : FlatString */;
+static val* varonce42;
+val* var43 /* : String */;
+char* var44 /* : NativeString */;
+val* var45 /* : FlatString */;
 val* var46 /* : String */;
-char* var47 /* : NativeString */;
-long var48 /* : Int */;
-val* var49 /* : FlatString */;
-val* var50 /* : Array[Object] */;
-long var51 /* : Int */;
-val* var52 /* : NativeArray[Object] */;
-val* var53 /* : String */;
-static val* varonce54;
-val* var55 /* : String */;
-char* var56 /* : NativeString */;
-long var57 /* : Int */;
-val* var58 /* : FlatString */;
+val* var47 /* : String */;
+val* var48 /* : String */;
+static val* varonce49;
+val* var50 /* : String */;
+char* var51 /* : NativeString */;
+val* var52 /* : FlatString */;
 var_v = p0;
 {
 { /* Inline typing#AExpr#mtype (self) on <self:AImpliesExpr> */
@@ -1448,8 +1949,8 @@ RET_LABEL2:(void)0;
 }
 if (unlikely(var1 == NULL)) {
 PRINT_ERROR("Runtime error: %s", "Cast failed");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 2644);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 2845);
+fatal_exit(1);
 }
 {
 var4 = nit___nit__AbstractCompilerVisitor___new_var(var_v, var1);
@@ -1460,8 +1961,8 @@ var_res = var4;
 var7 = self->attrs[COLOR_nit__parser_nodes__ABinBoolExpr___n_expr].val; /* _n_expr on <self:AImpliesExpr> */
 if (unlikely(var7 == NULL)) {
 PRINT_ERROR("Runtime error: %s", "Uninitialized attribute _n_expr");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__parser_nodes, 1823);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__parser_nodes, 2053);
+fatal_exit(1);
 }
 var5 = var7;
 RET_LABEL6:(void)0;
@@ -1471,141 +1972,143 @@ RET_LABEL6:(void)0;
 var8 = nit___nit__AbstractCompilerVisitor___expr_bool(var_v, var5);
 }
 var_i1 = var8;
-if (varonce) {
-var9 = varonce;
+if (unlikely(varonce==NULL)) {
+var9 = NEW_standard__NativeArray(3l, &type_standard__NativeArray__standard__String);
+if (likely(varonce10!=NULL)) {
+var11 = varonce10;
 } else {
-var10 = "if (!";
-var11 = 5;
-var12 = standard___standard__NativeString___to_s_with_length(var10, var11);
-var9 = var12;
-varonce = var9;
+var12 = "if (!";
+var13 = standard___standard__NativeString___to_s_with_length(var12, 5l);
+var11 = var13;
+varonce10 = var11;
 }
-if (varonce13) {
-var14 = varonce13;
+((struct instance_standard__NativeArray*)var9)->values[0]=var11;
+if (likely(varonce14!=NULL)) {
+var15 = varonce14;
 } else {
-var15 = ") {";
-var16 = 3;
-var17 = standard___standard__NativeString___to_s_with_length(var15, var16);
-var14 = var17;
-varonce13 = var14;
+var16 = ") {";
+var17 = standard___standard__NativeString___to_s_with_length(var16, 3l);
+var15 = var17;
+varonce14 = var15;
 }
-var18 = NEW_standard__Array(&type_standard__Array__standard__Object);
-{ /* var18 = array_instance Array[Object] */
-var19 = 3;
-var20 = NEW_standard__NativeArray(var19, &type_standard__NativeArray__standard__Object);
-((struct instance_standard__NativeArray*)var20)->values[0] = (val*) var9;
-((struct instance_standard__NativeArray*)var20)->values[1] = (val*) var_i1;
-((struct instance_standard__NativeArray*)var20)->values[2] = (val*) var14;
-{
-((void (*)(val* self, val* p0, long p1))(var18->class->vft[COLOR_standard__array__Array__with_native]))(var18, var20, var19) /* with_native on <var18:Array[Object]>*/;
+((struct instance_standard__NativeArray*)var9)->values[2]=var15;
+} else {
+var9 = varonce;
+varonce = NULL;
 }
+{
+var18 = ((val*(*)(val* self))(var_i1->class->vft[COLOR_standard__string__Object__to_s]))(var_i1); /* to_s on <var_i1:RuntimeVariable>*/
 }
+((struct instance_standard__NativeArray*)var9)->values[1]=var18;
 {
-var21 = ((val* (*)(val* self))(var18->class->vft[COLOR_standard__string__Object__to_s]))(var18) /* to_s on <var18:Array[Object]>*/;
+var19 = ((val*(*)(val* self))(var9->class->vft[COLOR_standard__string__NativeArray__native_to_s]))(var9); /* native_to_s on <var9:NativeArray[String]>*/
 }
+varonce = var9;
 {
-nit___nit__AbstractCompilerVisitor___add(var_v, var21); /* Direct call abstract_compiler#AbstractCompilerVisitor#add on <var_v:AbstractCompilerVisitor>*/
+nit___nit__AbstractCompilerVisitor___add(var_v, var19); /* Direct call abstract_compiler#AbstractCompilerVisitor#add on <var_v:AbstractCompilerVisitor>*/
 }
-if (varonce22) {
+if (unlikely(varonce20==NULL)) {
+var21 = NEW_standard__NativeArray(2l, &type_standard__NativeArray__standard__String);
+if (likely(varonce22!=NULL)) {
 var23 = varonce22;
 } else {
 var24 = " = 1;";
-var25 = 5;
-var26 = standard___standard__NativeString___to_s_with_length(var24, var25);
-var23 = var26;
+var25 = standard___standard__NativeString___to_s_with_length(var24, 5l);
+var23 = var25;
 varonce22 = var23;
 }
-var27 = NEW_standard__Array(&type_standard__Array__standard__Object);
-{ /* var27 = array_instance Array[Object] */
-var28 = 2;
-var29 = NEW_standard__NativeArray(var28, &type_standard__NativeArray__standard__Object);
-((struct instance_standard__NativeArray*)var29)->values[0] = (val*) var_res;
-((struct instance_standard__NativeArray*)var29)->values[1] = (val*) var23;
-{
-((void (*)(val* self, val* p0, long p1))(var27->class->vft[COLOR_standard__array__Array__with_native]))(var27, var29, var28) /* with_native on <var27:Array[Object]>*/;
+((struct instance_standard__NativeArray*)var21)->values[1]=var23;
+} else {
+var21 = varonce20;
+varonce20 = NULL;
 }
+{
+var26 = ((val*(*)(val* self))(var_res->class->vft[COLOR_standard__string__Object__to_s]))(var_res); /* to_s on <var_res:RuntimeVariable>*/
 }
+((struct instance_standard__NativeArray*)var21)->values[0]=var26;
 {
-var30 = ((val* (*)(val* self))(var27->class->vft[COLOR_standard__string__Object__to_s]))(var27) /* to_s on <var27:Array[Object]>*/;
+var27 = ((val*(*)(val* self))(var21->class->vft[COLOR_standard__string__NativeArray__native_to_s]))(var21); /* native_to_s on <var21:NativeArray[String]>*/
 }
+varonce20 = var21;
 {
-nit___nit__AbstractCompilerVisitor___add(var_v, var30); /* Direct call abstract_compiler#AbstractCompilerVisitor#add on <var_v:AbstractCompilerVisitor>*/
+nit___nit__AbstractCompilerVisitor___add(var_v, var27); /* Direct call abstract_compiler#AbstractCompilerVisitor#add on <var_v:AbstractCompilerVisitor>*/
 }
-if (varonce31) {
-var32 = varonce31;
+if (likely(varonce28!=NULL)) {
+var29 = varonce28;
 } else {
-var33 = "} else {";
-var34 = 8;
-var35 = standard___standard__NativeString___to_s_with_length(var33, var34);
-var32 = var35;
-varonce31 = var32;
+var30 = "} else {";
+var31 = standard___standard__NativeString___to_s_with_length(var30, 8l);
+var29 = var31;
+varonce28 = var29;
 }
 {
-nit___nit__AbstractCompilerVisitor___add(var_v, var32); /* Direct call abstract_compiler#AbstractCompilerVisitor#add on <var_v:AbstractCompilerVisitor>*/
+nit___nit__AbstractCompilerVisitor___add(var_v, var29); /* Direct call abstract_compiler#AbstractCompilerVisitor#add on <var_v:AbstractCompilerVisitor>*/
 }
 {
 { /* Inline parser_nodes#ABinBoolExpr#n_expr2 (self) on <self:AImpliesExpr> */
-var38 = self->attrs[COLOR_nit__parser_nodes__ABinBoolExpr___n_expr2].val; /* _n_expr2 on <self:AImpliesExpr> */
-if (unlikely(var38 == NULL)) {
+var34 = self->attrs[COLOR_nit__parser_nodes__ABinBoolExpr___n_expr2].val; /* _n_expr2 on <self:AImpliesExpr> */
+if (unlikely(var34 == NULL)) {
 PRINT_ERROR("Runtime error: %s", "Uninitialized attribute _n_expr2");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__parser_nodes, 1826);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__parser_nodes, 2059);
+fatal_exit(1);
 }
-var36 = var38;
-RET_LABEL37:(void)0;
+var32 = var34;
+RET_LABEL33:(void)0;
 }
 }
 {
-var39 = nit___nit__AbstractCompilerVisitor___expr_bool(var_v, var36);
+var35 = nit___nit__AbstractCompilerVisitor___expr_bool(var_v, var32);
 }
-var_i2 = var39;
-if (varonce40) {
-var41 = varonce40;
+var_i2 = var35;
+if (unlikely(varonce36==NULL)) {
+var37 = NEW_standard__NativeArray(4l, &type_standard__NativeArray__standard__String);
+if (likely(varonce38!=NULL)) {
+var39 = varonce38;
 } else {
-var42 = " = ";
-var43 = 3;
-var44 = standard___standard__NativeString___to_s_with_length(var42, var43);
-var41 = var44;
-varonce40 = var41;
+var40 = " = ";
+var41 = standard___standard__NativeString___to_s_with_length(var40, 3l);
+var39 = var41;
+varonce38 = var39;
 }
-if (varonce45) {
-var46 = varonce45;
+((struct instance_standard__NativeArray*)var37)->values[1]=var39;
+if (likely(varonce42!=NULL)) {
+var43 = varonce42;
 } else {
-var47 = ";";
-var48 = 1;
-var49 = standard___standard__NativeString___to_s_with_length(var47, var48);
-var46 = var49;
-varonce45 = var46;
+var44 = ";";
+var45 = standard___standard__NativeString___to_s_with_length(var44, 1l);
+var43 = var45;
+varonce42 = var43;
+}
+((struct instance_standard__NativeArray*)var37)->values[3]=var43;
+} else {
+var37 = varonce36;
+varonce36 = NULL;
 }
-var50 = NEW_standard__Array(&type_standard__Array__standard__Object);
-{ /* var50 = array_instance Array[Object] */
-var51 = 4;
-var52 = NEW_standard__NativeArray(var51, &type_standard__NativeArray__standard__Object);
-((struct instance_standard__NativeArray*)var52)->values[0] = (val*) var_res;
-((struct instance_standard__NativeArray*)var52)->values[1] = (val*) var41;
-((struct instance_standard__NativeArray*)var52)->values[2] = (val*) var_i2;
-((struct instance_standard__NativeArray*)var52)->values[3] = (val*) var46;
 {
-((void (*)(val* self, val* p0, long p1))(var50->class->vft[COLOR_standard__array__Array__with_native]))(var50, var52, var51) /* with_native on <var50:Array[Object]>*/;
+var46 = ((val*(*)(val* self))(var_res->class->vft[COLOR_standard__string__Object__to_s]))(var_res); /* to_s on <var_res:RuntimeVariable>*/
 }
+((struct instance_standard__NativeArray*)var37)->values[0]=var46;
+{
+var47 = ((val*(*)(val* self))(var_i2->class->vft[COLOR_standard__string__Object__to_s]))(var_i2); /* to_s on <var_i2:RuntimeVariable>*/
 }
+((struct instance_standard__NativeArray*)var37)->values[2]=var47;
 {
-var53 = ((val* (*)(val* self))(var50->class->vft[COLOR_standard__string__Object__to_s]))(var50) /* to_s on <var50:Array[Object]>*/;
+var48 = ((val*(*)(val* self))(var37->class->vft[COLOR_standard__string__NativeArray__native_to_s]))(var37); /* native_to_s on <var37:NativeArray[String]>*/
 }
+varonce36 = var37;
 {
-nit___nit__AbstractCompilerVisitor___add(var_v, var53); /* Direct call abstract_compiler#AbstractCompilerVisitor#add on <var_v:AbstractCompilerVisitor>*/
+nit___nit__AbstractCompilerVisitor___add(var_v, var48); /* Direct call abstract_compiler#AbstractCompilerVisitor#add on <var_v:AbstractCompilerVisitor>*/
 }
-if (varonce54) {
-var55 = varonce54;
+if (likely(varonce49!=NULL)) {
+var50 = varonce49;
 } else {
-var56 = "}";
-var57 = 1;
-var58 = standard___standard__NativeString___to_s_with_length(var56, var57);
-var55 = var58;
-varonce54 = var55;
+var51 = "}";
+var52 = standard___standard__NativeString___to_s_with_length(var51, 1l);
+var50 = var52;
+varonce49 = var50;
 }
 {
-nit___nit__AbstractCompilerVisitor___add(var_v, var55); /* Direct call abstract_compiler#AbstractCompilerVisitor#add on <var_v:AbstractCompilerVisitor>*/
+nit___nit__AbstractCompilerVisitor___add(var_v, var50); /* Direct call abstract_compiler#AbstractCompilerVisitor#add on <var_v:AbstractCompilerVisitor>*/
 }
 var = var_res;
 goto RET_LABEL;
@@ -1624,57 +2127,51 @@ val* var5 /* : AExpr */;
 val* var7 /* : AExpr */;
 val* var8 /* : RuntimeVariable */;
 val* var_i1 /* var i1: RuntimeVariable */;
+val* var9 /* : NativeArray[String] */;
 static val* varonce;
-val* var9 /* : String */;
-char* var10 /* : NativeString */;
-long var11 /* : Int */;
-val* var12 /* : FlatString */;
-static val* varonce13;
-val* var14 /* : String */;
-char* var15 /* : NativeString */;
-long var16 /* : Int */;
+static val* varonce10;
+val* var11 /* : String */;
+char* var12 /* : NativeString */;
+val* var13 /* : FlatString */;
+static val* varonce14;
+val* var15 /* : String */;
+char* var16 /* : NativeString */;
 val* var17 /* : FlatString */;
-val* var18 /* : Array[Object] */;
-long var19 /* : Int */;
-val* var20 /* : NativeArray[Object] */;
-val* var21 /* : String */;
+val* var18 /* : String */;
+val* var19 /* : String */;
+val* var21 /* : NativeArray[String] */;
+static val* varonce20;
 static val* varonce22;
 val* var23 /* : String */;
 char* var24 /* : NativeString */;
-long var25 /* : Int */;
-val* var26 /* : FlatString */;
-val* var27 /* : Array[Object] */;
-long var28 /* : Int */;
-val* var29 /* : NativeArray[Object] */;
-val* var30 /* : String */;
-static val* varonce31;
-val* var32 /* : String */;
-char* var33 /* : NativeString */;
-long var34 /* : Int */;
-val* var35 /* : FlatString */;
-val* var36 /* : AExpr */;
-val* var38 /* : AExpr */;
-val* var39 /* : RuntimeVariable */;
+val* var25 /* : FlatString */;
+val* var26 /* : String */;
+val* var27 /* : String */;
+static val* varonce28;
+val* var29 /* : String */;
+char* var30 /* : NativeString */;
+val* var31 /* : FlatString */;
+val* var32 /* : AExpr */;
+val* var34 /* : AExpr */;
+val* var35 /* : RuntimeVariable */;
 val* var_i2 /* var i2: RuntimeVariable */;
-static val* varonce40;
-val* var41 /* : String */;
-char* var42 /* : NativeString */;
-long var43 /* : Int */;
-val* var44 /* : FlatString */;
-static val* varonce45;
+val* var37 /* : NativeArray[String] */;
+static val* varonce36;
+static val* varonce38;
+val* var39 /* : String */;
+char* var40 /* : NativeString */;
+val* var41 /* : FlatString */;
+static val* varonce42;
+val* var43 /* : String */;
+char* var44 /* : NativeString */;
+val* var45 /* : FlatString */;
 val* var46 /* : String */;
-char* var47 /* : NativeString */;
-long var48 /* : Int */;
-val* var49 /* : FlatString */;
-val* var50 /* : Array[Object] */;
-long var51 /* : Int */;
-val* var52 /* : NativeArray[Object] */;
-val* var53 /* : String */;
-static val* varonce54;
-val* var55 /* : String */;
-char* var56 /* : NativeString */;
-long var57 /* : Int */;
-val* var58 /* : FlatString */;
+val* var47 /* : String */;
+val* var48 /* : String */;
+static val* varonce49;
+val* var50 /* : String */;
+char* var51 /* : NativeString */;
+val* var52 /* : FlatString */;
 var_v = p0;
 {
 { /* Inline typing#AExpr#mtype (self) on <self:AAndExpr> */
@@ -1685,8 +2182,8 @@ RET_LABEL2:(void)0;
 }
 if (unlikely(var1 == NULL)) {
 PRINT_ERROR("Runtime error: %s", "Cast failed");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 2659);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 2860);
+fatal_exit(1);
 }
 {
 var4 = nit___nit__AbstractCompilerVisitor___new_var(var_v, var1);
@@ -1697,8 +2194,8 @@ var_res = var4;
 var7 = self->attrs[COLOR_nit__parser_nodes__ABinBoolExpr___n_expr].val; /* _n_expr on <self:AAndExpr> */
 if (unlikely(var7 == NULL)) {
 PRINT_ERROR("Runtime error: %s", "Uninitialized attribute _n_expr");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__parser_nodes, 1823);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__parser_nodes, 2053);
+fatal_exit(1);
 }
 var5 = var7;
 RET_LABEL6:(void)0;
@@ -1708,141 +2205,143 @@ RET_LABEL6:(void)0;
 var8 = nit___nit__AbstractCompilerVisitor___expr_bool(var_v, var5);
 }
 var_i1 = var8;
-if (varonce) {
-var9 = varonce;
+if (unlikely(varonce==NULL)) {
+var9 = NEW_standard__NativeArray(3l, &type_standard__NativeArray__standard__String);
+if (likely(varonce10!=NULL)) {
+var11 = varonce10;
 } else {
-var10 = "if (!";
-var11 = 5;
-var12 = standard___standard__NativeString___to_s_with_length(var10, var11);
-var9 = var12;
-varonce = var9;
+var12 = "if (!";
+var13 = standard___standard__NativeString___to_s_with_length(var12, 5l);
+var11 = var13;
+varonce10 = var11;
 }
-if (varonce13) {
-var14 = varonce13;
+((struct instance_standard__NativeArray*)var9)->values[0]=var11;
+if (likely(varonce14!=NULL)) {
+var15 = varonce14;
 } else {
-var15 = ") {";
-var16 = 3;
-var17 = standard___standard__NativeString___to_s_with_length(var15, var16);
-var14 = var17;
-varonce13 = var14;
+var16 = ") {";
+var17 = standard___standard__NativeString___to_s_with_length(var16, 3l);
+var15 = var17;
+varonce14 = var15;
 }
-var18 = NEW_standard__Array(&type_standard__Array__standard__Object);
-{ /* var18 = array_instance Array[Object] */
-var19 = 3;
-var20 = NEW_standard__NativeArray(var19, &type_standard__NativeArray__standard__Object);
-((struct instance_standard__NativeArray*)var20)->values[0] = (val*) var9;
-((struct instance_standard__NativeArray*)var20)->values[1] = (val*) var_i1;
-((struct instance_standard__NativeArray*)var20)->values[2] = (val*) var14;
-{
-((void (*)(val* self, val* p0, long p1))(var18->class->vft[COLOR_standard__array__Array__with_native]))(var18, var20, var19) /* with_native on <var18:Array[Object]>*/;
+((struct instance_standard__NativeArray*)var9)->values[2]=var15;
+} else {
+var9 = varonce;
+varonce = NULL;
 }
+{
+var18 = ((val*(*)(val* self))(var_i1->class->vft[COLOR_standard__string__Object__to_s]))(var_i1); /* to_s on <var_i1:RuntimeVariable>*/
 }
+((struct instance_standard__NativeArray*)var9)->values[1]=var18;
 {
-var21 = ((val* (*)(val* self))(var18->class->vft[COLOR_standard__string__Object__to_s]))(var18) /* to_s on <var18:Array[Object]>*/;
+var19 = ((val*(*)(val* self))(var9->class->vft[COLOR_standard__string__NativeArray__native_to_s]))(var9); /* native_to_s on <var9:NativeArray[String]>*/
 }
+varonce = var9;
 {
-nit___nit__AbstractCompilerVisitor___add(var_v, var21); /* Direct call abstract_compiler#AbstractCompilerVisitor#add on <var_v:AbstractCompilerVisitor>*/
+nit___nit__AbstractCompilerVisitor___add(var_v, var19); /* Direct call abstract_compiler#AbstractCompilerVisitor#add on <var_v:AbstractCompilerVisitor>*/
 }
-if (varonce22) {
+if (unlikely(varonce20==NULL)) {
+var21 = NEW_standard__NativeArray(2l, &type_standard__NativeArray__standard__String);
+if (likely(varonce22!=NULL)) {
 var23 = varonce22;
 } else {
 var24 = " = 0;";
-var25 = 5;
-var26 = standard___standard__NativeString___to_s_with_length(var24, var25);
-var23 = var26;
+var25 = standard___standard__NativeString___to_s_with_length(var24, 5l);
+var23 = var25;
 varonce22 = var23;
 }
-var27 = NEW_standard__Array(&type_standard__Array__standard__Object);
-{ /* var27 = array_instance Array[Object] */
-var28 = 2;
-var29 = NEW_standard__NativeArray(var28, &type_standard__NativeArray__standard__Object);
-((struct instance_standard__NativeArray*)var29)->values[0] = (val*) var_res;
-((struct instance_standard__NativeArray*)var29)->values[1] = (val*) var23;
-{
-((void (*)(val* self, val* p0, long p1))(var27->class->vft[COLOR_standard__array__Array__with_native]))(var27, var29, var28) /* with_native on <var27:Array[Object]>*/;
+((struct instance_standard__NativeArray*)var21)->values[1]=var23;
+} else {
+var21 = varonce20;
+varonce20 = NULL;
 }
+{
+var26 = ((val*(*)(val* self))(var_res->class->vft[COLOR_standard__string__Object__to_s]))(var_res); /* to_s on <var_res:RuntimeVariable>*/
 }
+((struct instance_standard__NativeArray*)var21)->values[0]=var26;
 {
-var30 = ((val* (*)(val* self))(var27->class->vft[COLOR_standard__string__Object__to_s]))(var27) /* to_s on <var27:Array[Object]>*/;
+var27 = ((val*(*)(val* self))(var21->class->vft[COLOR_standard__string__NativeArray__native_to_s]))(var21); /* native_to_s on <var21:NativeArray[String]>*/
 }
+varonce20 = var21;
 {
-nit___nit__AbstractCompilerVisitor___add(var_v, var30); /* Direct call abstract_compiler#AbstractCompilerVisitor#add on <var_v:AbstractCompilerVisitor>*/
+nit___nit__AbstractCompilerVisitor___add(var_v, var27); /* Direct call abstract_compiler#AbstractCompilerVisitor#add on <var_v:AbstractCompilerVisitor>*/
 }
-if (varonce31) {
-var32 = varonce31;
+if (likely(varonce28!=NULL)) {
+var29 = varonce28;
 } else {
-var33 = "} else {";
-var34 = 8;
-var35 = standard___standard__NativeString___to_s_with_length(var33, var34);
-var32 = var35;
-varonce31 = var32;
+var30 = "} else {";
+var31 = standard___standard__NativeString___to_s_with_length(var30, 8l);
+var29 = var31;
+varonce28 = var29;
 }
 {
-nit___nit__AbstractCompilerVisitor___add(var_v, var32); /* Direct call abstract_compiler#AbstractCompilerVisitor#add on <var_v:AbstractCompilerVisitor>*/
+nit___nit__AbstractCompilerVisitor___add(var_v, var29); /* Direct call abstract_compiler#AbstractCompilerVisitor#add on <var_v:AbstractCompilerVisitor>*/
 }
 {
 { /* Inline parser_nodes#ABinBoolExpr#n_expr2 (self) on <self:AAndExpr> */
-var38 = self->attrs[COLOR_nit__parser_nodes__ABinBoolExpr___n_expr2].val; /* _n_expr2 on <self:AAndExpr> */
-if (unlikely(var38 == NULL)) {
+var34 = self->attrs[COLOR_nit__parser_nodes__ABinBoolExpr___n_expr2].val; /* _n_expr2 on <self:AAndExpr> */
+if (unlikely(var34 == NULL)) {
 PRINT_ERROR("Runtime error: %s", "Uninitialized attribute _n_expr2");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__parser_nodes, 1826);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__parser_nodes, 2059);
+fatal_exit(1);
 }
-var36 = var38;
-RET_LABEL37:(void)0;
+var32 = var34;
+RET_LABEL33:(void)0;
 }
 }
 {
-var39 = nit___nit__AbstractCompilerVisitor___expr_bool(var_v, var36);
+var35 = nit___nit__AbstractCompilerVisitor___expr_bool(var_v, var32);
 }
-var_i2 = var39;
-if (varonce40) {
-var41 = varonce40;
+var_i2 = var35;
+if (unlikely(varonce36==NULL)) {
+var37 = NEW_standard__NativeArray(4l, &type_standard__NativeArray__standard__String);
+if (likely(varonce38!=NULL)) {
+var39 = varonce38;
 } else {
-var42 = " = ";
-var43 = 3;
-var44 = standard___standard__NativeString___to_s_with_length(var42, var43);
-var41 = var44;
-varonce40 = var41;
+var40 = " = ";
+var41 = standard___standard__NativeString___to_s_with_length(var40, 3l);
+var39 = var41;
+varonce38 = var39;
 }
-if (varonce45) {
-var46 = varonce45;
+((struct instance_standard__NativeArray*)var37)->values[1]=var39;
+if (likely(varonce42!=NULL)) {
+var43 = varonce42;
 } else {
-var47 = ";";
-var48 = 1;
-var49 = standard___standard__NativeString___to_s_with_length(var47, var48);
-var46 = var49;
-varonce45 = var46;
+var44 = ";";
+var45 = standard___standard__NativeString___to_s_with_length(var44, 1l);
+var43 = var45;
+varonce42 = var43;
+}
+((struct instance_standard__NativeArray*)var37)->values[3]=var43;
+} else {
+var37 = varonce36;
+varonce36 = NULL;
 }
-var50 = NEW_standard__Array(&type_standard__Array__standard__Object);
-{ /* var50 = array_instance Array[Object] */
-var51 = 4;
-var52 = NEW_standard__NativeArray(var51, &type_standard__NativeArray__standard__Object);
-((struct instance_standard__NativeArray*)var52)->values[0] = (val*) var_res;
-((struct instance_standard__NativeArray*)var52)->values[1] = (val*) var41;
-((struct instance_standard__NativeArray*)var52)->values[2] = (val*) var_i2;
-((struct instance_standard__NativeArray*)var52)->values[3] = (val*) var46;
 {
-((void (*)(val* self, val* p0, long p1))(var50->class->vft[COLOR_standard__array__Array__with_native]))(var50, var52, var51) /* with_native on <var50:Array[Object]>*/;
+var46 = ((val*(*)(val* self))(var_res->class->vft[COLOR_standard__string__Object__to_s]))(var_res); /* to_s on <var_res:RuntimeVariable>*/
 }
+((struct instance_standard__NativeArray*)var37)->values[0]=var46;
+{
+var47 = ((val*(*)(val* self))(var_i2->class->vft[COLOR_standard__string__Object__to_s]))(var_i2); /* to_s on <var_i2:RuntimeVariable>*/
 }
+((struct instance_standard__NativeArray*)var37)->values[2]=var47;
 {
-var53 = ((val* (*)(val* self))(var50->class->vft[COLOR_standard__string__Object__to_s]))(var50) /* to_s on <var50:Array[Object]>*/;
+var48 = ((val*(*)(val* self))(var37->class->vft[COLOR_standard__string__NativeArray__native_to_s]))(var37); /* native_to_s on <var37:NativeArray[String]>*/
 }
+varonce36 = var37;
 {
-nit___nit__AbstractCompilerVisitor___add(var_v, var53); /* Direct call abstract_compiler#AbstractCompilerVisitor#add on <var_v:AbstractCompilerVisitor>*/
+nit___nit__AbstractCompilerVisitor___add(var_v, var48); /* Direct call abstract_compiler#AbstractCompilerVisitor#add on <var_v:AbstractCompilerVisitor>*/
 }
-if (varonce54) {
-var55 = varonce54;
+if (likely(varonce49!=NULL)) {
+var50 = varonce49;
 } else {
-var56 = "}";
-var57 = 1;
-var58 = standard___standard__NativeString___to_s_with_length(var56, var57);
-var55 = var58;
-varonce54 = var55;
+var51 = "}";
+var52 = standard___standard__NativeString___to_s_with_length(var51, 1l);
+var50 = var52;
+varonce49 = var50;
 }
 {
-nit___nit__AbstractCompilerVisitor___add(var_v, var55); /* Direct call abstract_compiler#AbstractCompilerVisitor#add on <var_v:AbstractCompilerVisitor>*/
+nit___nit__AbstractCompilerVisitor___add(var_v, var50); /* Direct call abstract_compiler#AbstractCompilerVisitor#add on <var_v:AbstractCompilerVisitor>*/
 }
 var = var_res;
 goto RET_LABEL;
@@ -1857,26 +2356,25 @@ val* var1 /* : AExpr */;
 val* var3 /* : AExpr */;
 val* var4 /* : RuntimeVariable */;
 val* var_cond /* var cond: RuntimeVariable */;
+val* var5 /* : NativeArray[String] */;
 static val* varonce;
-val* var5 /* : String */;
-char* var6 /* : NativeString */;
-long var7 /* : Int */;
-val* var8 /* : FlatString */;
-val* var9 /* : Array[Object] */;
-long var10 /* : Int */;
-val* var11 /* : NativeArray[Object] */;
-val* var12 /* : String */;
-val* var13 /* : nullable MType */;
-val* var15 /* : nullable MType */;
-val* var16 /* : RuntimeVariable */;
+static val* varonce6;
+val* var7 /* : String */;
+char* var8 /* : NativeString */;
+val* var9 /* : FlatString */;
+val* var10 /* : String */;
+val* var11 /* : String */;
+val* var12 /* : nullable MType */;
+val* var14 /* : nullable MType */;
+val* var15 /* : RuntimeVariable */;
 var_v = p0;
 {
 { /* Inline parser_nodes#ANotExpr#n_expr (self) on <self:ANotExpr> */
 var3 = self->attrs[COLOR_nit__parser_nodes__ANotExpr___n_expr].val; /* _n_expr on <self:ANotExpr> */
 if (unlikely(var3 == NULL)) {
 PRINT_ERROR("Runtime error: %s", "Uninitialized attribute _n_expr");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__parser_nodes, 1857);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__parser_nodes, 2093);
+fatal_exit(1);
 }
 var1 = var3;
 RET_LABEL2:(void)0;
@@ -1886,44 +2384,45 @@ RET_LABEL2:(void)0;
 var4 = nit___nit__AbstractCompilerVisitor___expr_bool(var_v, var1);
 }
 var_cond = var4;
-if (varonce) {
-var5 = varonce;
+if (unlikely(varonce==NULL)) {
+var5 = NEW_standard__NativeArray(2l, &type_standard__NativeArray__standard__String);
+if (likely(varonce6!=NULL)) {
+var7 = varonce6;
 } else {
-var6 = "!";
-var7 = 1;
-var8 = standard___standard__NativeString___to_s_with_length(var6, var7);
-var5 = var8;
-varonce = var5;
+var8 = "!";
+var9 = standard___standard__NativeString___to_s_with_length(var8, 1l);
+var7 = var9;
+varonce6 = var7;
 }
-var9 = NEW_standard__Array(&type_standard__Array__standard__Object);
-{ /* var9 = array_instance Array[Object] */
-var10 = 2;
-var11 = NEW_standard__NativeArray(var10, &type_standard__NativeArray__standard__Object);
-((struct instance_standard__NativeArray*)var11)->values[0] = (val*) var5;
-((struct instance_standard__NativeArray*)var11)->values[1] = (val*) var_cond;
-{
-((void (*)(val* self, val* p0, long p1))(var9->class->vft[COLOR_standard__array__Array__with_native]))(var9, var11, var10) /* with_native on <var9:Array[Object]>*/;
+((struct instance_standard__NativeArray*)var5)->values[0]=var7;
+} else {
+var5 = varonce;
+varonce = NULL;
 }
+{
+var10 = ((val*(*)(val* self))(var_cond->class->vft[COLOR_standard__string__Object__to_s]))(var_cond); /* to_s on <var_cond:RuntimeVariable>*/
 }
+((struct instance_standard__NativeArray*)var5)->values[1]=var10;
 {
-var12 = ((val* (*)(val* self))(var9->class->vft[COLOR_standard__string__Object__to_s]))(var9) /* to_s on <var9:Array[Object]>*/;
+var11 = ((val*(*)(val* self))(var5->class->vft[COLOR_standard__string__NativeArray__native_to_s]))(var5); /* native_to_s on <var5:NativeArray[String]>*/
 }
+varonce = var5;
 {
 { /* Inline typing#AExpr#mtype (self) on <self:ANotExpr> */
-var15 = self->attrs[COLOR_nit__typing__AExpr___mtype].val; /* _mtype on <self:ANotExpr> */
-var13 = var15;
-RET_LABEL14:(void)0;
+var14 = self->attrs[COLOR_nit__typing__AExpr___mtype].val; /* _mtype on <self:ANotExpr> */
+var12 = var14;
+RET_LABEL13:(void)0;
 }
 }
-if (unlikely(var13 == NULL)) {
+if (unlikely(var12 == NULL)) {
 PRINT_ERROR("Runtime error: %s", "Cast failed");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 2675);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 2876);
+fatal_exit(1);
 }
 {
-var16 = nit___nit__AbstractCompilerVisitor___new_expr(var_v, var12, var13);
+var15 = nit___nit__AbstractCompilerVisitor___new_expr(var_v, var11, var12);
 }
-var = var16;
+var = var15;
 goto RET_LABEL;
 RET_LABEL:;
 return var;
@@ -1938,38 +2437,32 @@ val* var4 /* : RuntimeVariable */;
 val* var_res /* var res: RuntimeVariable */;
 val* var5 /* : AExpr */;
 val* var7 /* : AExpr */;
-val* var8 /* : null */;
-val* var9 /* : RuntimeVariable */;
+val* var8 /* : RuntimeVariable */;
 val* var_i1 /* var i1: RuntimeVariable */;
+val* var9 /* : NativeArray[String] */;
 static val* varonce;
-val* var10 /* : String */;
-char* var11 /* : NativeString */;
-long var12 /* : Int */;
+static val* varonce10;
+val* var11 /* : String */;
+char* var12 /* : NativeString */;
 val* var13 /* : FlatString */;
 static val* varonce14;
 val* var15 /* : String */;
 char* var16 /* : NativeString */;
-long var17 /* : Int */;
-val* var18 /* : FlatString */;
-val* var19 /* : Array[Object] */;
-long var20 /* : Int */;
-val* var21 /* : NativeArray[Object] */;
-val* var22 /* : String */;
-static val* varonce23;
-val* var24 /* : String */;
-char* var25 /* : NativeString */;
-long var26 /* : Int */;
-val* var27 /* : FlatString */;
-val* var28 /* : AExpr */;
-val* var30 /* : AExpr */;
-val* var31 /* : null */;
-val* var32 /* : RuntimeVariable */;
+val* var17 /* : FlatString */;
+val* var18 /* : String */;
+val* var19 /* : String */;
+static val* varonce20;
+val* var21 /* : String */;
+char* var22 /* : NativeString */;
+val* var23 /* : FlatString */;
+val* var24 /* : AExpr */;
+val* var26 /* : AExpr */;
+val* var27 /* : RuntimeVariable */;
 val* var_i2 /* var i2: RuntimeVariable */;
-static val* varonce33;
-val* var34 /* : String */;
-char* var35 /* : NativeString */;
-long var36 /* : Int */;
-val* var37 /* : FlatString */;
+static val* varonce28;
+val* var29 /* : String */;
+char* var30 /* : NativeString */;
+val* var31 /* : FlatString */;
 var_v = p0;
 {
 { /* Inline typing#AExpr#mtype (self) on <self:AOrElseExpr> */
@@ -1980,8 +2473,8 @@ RET_LABEL2:(void)0;
 }
 if (unlikely(var1 == NULL)) {
 PRINT_ERROR("Runtime error: %s", "Cast failed");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 2682);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 2883);
+fatal_exit(1);
 }
 {
 var4 = nit___nit__AbstractCompilerVisitor___new_var(var_v, var1);
@@ -1992,99 +2485,95 @@ var_res = var4;
 var7 = self->attrs[COLOR_nit__parser_nodes__ABinBoolExpr___n_expr].val; /* _n_expr on <self:AOrElseExpr> */
 if (unlikely(var7 == NULL)) {
 PRINT_ERROR("Runtime error: %s", "Uninitialized attribute _n_expr");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__parser_nodes, 1823);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__parser_nodes, 2053);
+fatal_exit(1);
 }
 var5 = var7;
 RET_LABEL6:(void)0;
 }
 }
-var8 = NULL;
 {
-var9 = nit___nit__AbstractCompilerVisitor___expr(var_v, var5, var8);
+var8 = nit___nit__AbstractCompilerVisitor___expr(var_v, var5, ((val*)NULL));
 }
-var_i1 = var9;
-if (varonce) {
-var10 = varonce;
+var_i1 = var8;
+if (unlikely(varonce==NULL)) {
+var9 = NEW_standard__NativeArray(3l, &type_standard__NativeArray__standard__String);
+if (likely(varonce10!=NULL)) {
+var11 = varonce10;
 } else {
-var11 = "if (";
-var12 = 4;
-var13 = standard___standard__NativeString___to_s_with_length(var11, var12);
-var10 = var13;
-varonce = var10;
+var12 = "if (";
+var13 = standard___standard__NativeString___to_s_with_length(var12, 4l);
+var11 = var13;
+varonce10 = var11;
 }
-if (varonce14) {
+((struct instance_standard__NativeArray*)var9)->values[0]=var11;
+if (likely(varonce14!=NULL)) {
 var15 = varonce14;
 } else {
 var16 = "!=NULL) {";
-var17 = 9;
-var18 = standard___standard__NativeString___to_s_with_length(var16, var17);
-var15 = var18;
+var17 = standard___standard__NativeString___to_s_with_length(var16, 9l);
+var15 = var17;
 varonce14 = var15;
 }
-var19 = NEW_standard__Array(&type_standard__Array__standard__Object);
-{ /* var19 = array_instance Array[Object] */
-var20 = 3;
-var21 = NEW_standard__NativeArray(var20, &type_standard__NativeArray__standard__Object);
-((struct instance_standard__NativeArray*)var21)->values[0] = (val*) var10;
-((struct instance_standard__NativeArray*)var21)->values[1] = (val*) var_i1;
-((struct instance_standard__NativeArray*)var21)->values[2] = (val*) var15;
-{
-((void (*)(val* self, val* p0, long p1))(var19->class->vft[COLOR_standard__array__Array__with_native]))(var19, var21, var20) /* with_native on <var19:Array[Object]>*/;
-}
+((struct instance_standard__NativeArray*)var9)->values[2]=var15;
+} else {
+var9 = varonce;
+varonce = NULL;
 }
 {
-var22 = ((val* (*)(val* self))(var19->class->vft[COLOR_standard__string__Object__to_s]))(var19) /* to_s on <var19:Array[Object]>*/;
+var18 = ((val*(*)(val* self))(var_i1->class->vft[COLOR_standard__string__Object__to_s]))(var_i1); /* to_s on <var_i1:RuntimeVariable>*/
 }
+((struct instance_standard__NativeArray*)var9)->values[1]=var18;
 {
-nit___nit__AbstractCompilerVisitor___add(var_v, var22); /* Direct call abstract_compiler#AbstractCompilerVisitor#add on <var_v:AbstractCompilerVisitor>*/
+var19 = ((val*(*)(val* self))(var9->class->vft[COLOR_standard__string__NativeArray__native_to_s]))(var9); /* native_to_s on <var9:NativeArray[String]>*/
+}
+varonce = var9;
+{
+nit___nit__AbstractCompilerVisitor___add(var_v, var19); /* Direct call abstract_compiler#AbstractCompilerVisitor#add on <var_v:AbstractCompilerVisitor>*/
 }
 {
 nit___nit__AbstractCompilerVisitor___assign(var_v, var_res, var_i1); /* Direct call abstract_compiler#AbstractCompilerVisitor#assign on <var_v:AbstractCompilerVisitor>*/
 }
-if (varonce23) {
-var24 = varonce23;
+if (likely(varonce20!=NULL)) {
+var21 = varonce20;
 } else {
-var25 = "} else {";
-var26 = 8;
-var27 = standard___standard__NativeString___to_s_with_length(var25, var26);
-var24 = var27;
-varonce23 = var24;
+var22 = "} else {";
+var23 = standard___standard__NativeString___to_s_with_length(var22, 8l);
+var21 = var23;
+varonce20 = var21;
 }
 {
-nit___nit__AbstractCompilerVisitor___add(var_v, var24); /* Direct call abstract_compiler#AbstractCompilerVisitor#add on <var_v:AbstractCompilerVisitor>*/
+nit___nit__AbstractCompilerVisitor___add(var_v, var21); /* Direct call abstract_compiler#AbstractCompilerVisitor#add on <var_v:AbstractCompilerVisitor>*/
 }
 {
 { /* Inline parser_nodes#ABinBoolExpr#n_expr2 (self) on <self:AOrElseExpr> */
-var30 = self->attrs[COLOR_nit__parser_nodes__ABinBoolExpr___n_expr2].val; /* _n_expr2 on <self:AOrElseExpr> */
-if (unlikely(var30 == NULL)) {
+var26 = self->attrs[COLOR_nit__parser_nodes__ABinBoolExpr___n_expr2].val; /* _n_expr2 on <self:AOrElseExpr> */
+if (unlikely(var26 == NULL)) {
 PRINT_ERROR("Runtime error: %s", "Uninitialized attribute _n_expr2");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__parser_nodes, 1826);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__parser_nodes, 2059);
+fatal_exit(1);
 }
-var28 = var30;
-RET_LABEL29:(void)0;
+var24 = var26;
+RET_LABEL25:(void)0;
 }
 }
-var31 = NULL;
 {
-var32 = nit___nit__AbstractCompilerVisitor___expr(var_v, var28, var31);
+var27 = nit___nit__AbstractCompilerVisitor___expr(var_v, var24, ((val*)NULL));
 }
-var_i2 = var32;
+var_i2 = var27;
 {
 nit___nit__AbstractCompilerVisitor___assign(var_v, var_res, var_i2); /* Direct call abstract_compiler#AbstractCompilerVisitor#assign on <var_v:AbstractCompilerVisitor>*/
 }
-if (varonce33) {
-var34 = varonce33;
+if (likely(varonce28!=NULL)) {
+var29 = varonce28;
 } else {
-var35 = "}";
-var36 = 1;
-var37 = standard___standard__NativeString___to_s_with_length(var35, var36);
-var34 = var37;
-varonce33 = var34;
+var30 = "}";
+var31 = standard___standard__NativeString___to_s_with_length(var30, 1l);
+var29 = var31;
+varonce28 = var29;
 }
 {
-nit___nit__AbstractCompilerVisitor___add(var_v, var34); /* Direct call abstract_compiler#AbstractCompilerVisitor#add on <var_v:AbstractCompilerVisitor>*/
+nit___nit__AbstractCompilerVisitor___add(var_v, var29); /* Direct call abstract_compiler#AbstractCompilerVisitor#add on <var_v:AbstractCompilerVisitor>*/
 }
 var = var_res;
 goto RET_LABEL;
@@ -2097,15 +2586,8 @@ val* var /* : nullable RuntimeVariable */;
 val* var_v /* var v: AbstractCompilerVisitor */;
 val* var1 /* : nullable Int */;
 val* var3 /* : nullable Int */;
-val* var4 /* : String */;
+val* var4 /* : RuntimeVariable */;
 long var5 /* : Int */;
-val* var6 /* : Array[Object] */;
-long var7 /* : Int */;
-val* var8 /* : NativeArray[Object] */;
-val* var9 /* : String */;
-val* var10 /* : nullable MType */;
-val* var12 /* : nullable MType */;
-val* var13 /* : RuntimeVariable */;
 var_v = p0;
 {
 { /* Inline literal#AIntExpr#value (self) on <self:AIntExpr> */
@@ -2114,42 +2596,46 @@ var1 = var3;
 RET_LABEL2:(void)0;
 }
 }
-if (var1 == NULL) {
-PRINT_ERROR("Runtime error: %s", "Receiver is null");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 2695);
-show_backtrace(1);
-} else {
-var5 = ((struct instance_standard__Int*)var1)->value; /* autounbox from nullable Int to Int */;
-var4 = standard__string___Int___Object__to_s(var5);
+if (unlikely(var1 == NULL)) {
+PRINT_ERROR("Runtime error: %s", "Cast failed");
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 2896);
+fatal_exit(1);
 }
-var6 = NEW_standard__Array(&type_standard__Array__standard__Object);
-{ /* var6 = array_instance Array[Object] */
-var7 = 1;
-var8 = NEW_standard__NativeArray(var7, &type_standard__NativeArray__standard__Object);
-((struct instance_standard__NativeArray*)var8)->values[0] = (val*) var4;
 {
-((void (*)(val* self, val* p0, long p1))(var6->class->vft[COLOR_standard__array__Array__with_native]))(var6, var8, var7) /* with_native on <var6:Array[Object]>*/;
+var5 = (long)(var1)>>2;
+var4 = nit___nit__AbstractCompilerVisitor___int_instance(var_v, var5);
 }
+var = var4;
+goto RET_LABEL;
+RET_LABEL:;
+return var;
 }
+/* method abstract_compiler#AByteExpr#expr for (self: AByteExpr, AbstractCompilerVisitor): nullable RuntimeVariable */
+val* nit__abstract_compiler___AByteExpr___AExpr__expr(val* self, val* p0) {
+val* var /* : nullable RuntimeVariable */;
+val* var_v /* var v: AbstractCompilerVisitor */;
+val* var1 /* : nullable Byte */;
+val* var3 /* : nullable Byte */;
+val* var4 /* : RuntimeVariable */;
+unsigned char var5 /* : Byte */;
+var_v = p0;
 {
-var9 = ((val* (*)(val* self))(var6->class->vft[COLOR_standard__string__Object__to_s]))(var6) /* to_s on <var6:Array[Object]>*/;
-}
-{
-{ /* Inline typing#AExpr#mtype (self) on <self:AIntExpr> */
-var12 = self->attrs[COLOR_nit__typing__AExpr___mtype].val; /* _mtype on <self:AIntExpr> */
-var10 = var12;
-RET_LABEL11:(void)0;
+{ /* Inline literal#AByteExpr#value (self) on <self:AByteExpr> */
+var3 = self->attrs[COLOR_nit__literal__AByteExpr___value].val; /* _value on <self:AByteExpr> */
+var1 = var3;
+RET_LABEL2:(void)0;
 }
 }
-if (unlikely(var10 == NULL)) {
+if (unlikely(var1 == NULL)) {
 PRINT_ERROR("Runtime error: %s", "Cast failed");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 2695);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 2900);
+fatal_exit(1);
 }
 {
-var13 = nit___nit__AbstractCompilerVisitor___new_expr(var_v, var9, var10);
+var5 = ((struct instance_standard__Byte*)var1)->value; /* autounbox from nullable Byte to Byte */;
+var4 = nit___nit__AbstractCompilerVisitor___byte_instance(var_v, var5);
 }
-var = var13;
+var = var4;
 goto RET_LABEL;
 RET_LABEL:;
 return var;
@@ -2158,540 +2644,1009 @@ return var;
 val* nit__abstract_compiler___AFloatExpr___AExpr__expr(val* self, val* p0) {
 val* var /* : nullable RuntimeVariable */;
 val* var_v /* var v: AbstractCompilerVisitor */;
-val* var1 /* : TFloat */;
-val* var3 /* : TFloat */;
-val* var4 /* : String */;
-val* var5 /* : Array[Object] */;
-long var6 /* : Int */;
-val* var7 /* : NativeArray[Object] */;
-val* var8 /* : String */;
-val* var9 /* : nullable MType */;
-val* var11 /* : nullable MType */;
-val* var12 /* : RuntimeVariable */;
+val* var1 /* : NativeArray[String] */;
+static val* varonce;
+val* var2 /* : TFloat */;
+val* var4 /* : TFloat */;
+val* var5 /* : String */;
+val* var6 /* : String */;
+val* var7 /* : RuntimeVariable */;
 var_v = p0;
+if (unlikely(varonce==NULL)) {
+var1 = NEW_standard__NativeArray(1l, &type_standard__NativeArray__standard__String);
+} else {
+var1 = varonce;
+varonce = NULL;
+}
 {
 { /* Inline parser_nodes#AFloatExpr#n_float (self) on <self:AFloatExpr> */
-var3 = self->attrs[COLOR_nit__parser_nodes__AFloatExpr___n_float].val; /* _n_float on <self:AFloatExpr> */
-if (unlikely(var3 == NULL)) {
+var4 = self->attrs[COLOR_nit__parser_nodes__AFloatExpr___n_float].val; /* _n_float on <self:AFloatExpr> */
+if (unlikely(var4 == NULL)) {
 PRINT_ERROR("Runtime error: %s", "Uninitialized attribute _n_float");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__parser_nodes, 2232);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__parser_nodes, 2581);
+fatal_exit(1);
+}
+var2 = var4;
+RET_LABEL3:(void)0;
+}
 }
+{
+var5 = nit__lexer_work___Token___text(var2);
+}
+((struct instance_standard__NativeArray*)var1)->values[0]=var5;
+{
+var6 = ((val*(*)(val* self))(var1->class->vft[COLOR_standard__string__NativeArray__native_to_s]))(var1); /* native_to_s on <var1:NativeArray[String]>*/
+}
+varonce = var1;
+{
+var7 = nit___nit__AbstractCompilerVisitor___float_instance(var_v, var6);
+}
+var = var7;
+goto RET_LABEL;
+RET_LABEL:;
+return var;
+}
+/* method abstract_compiler#ACharExpr#expr for (self: ACharExpr, AbstractCompilerVisitor): nullable RuntimeVariable */
+val* nit__abstract_compiler___ACharExpr___AExpr__expr(val* self, val* p0) {
+val* var /* : nullable RuntimeVariable */;
+val* var_v /* var v: AbstractCompilerVisitor */;
+val* var1 /* : nullable Char */;
+val* var3 /* : nullable Char */;
+val* var4 /* : RuntimeVariable */;
+uint32_t var5 /* : Char */;
+var_v = p0;
+{
+{ /* Inline literal#ACharExpr#value (self) on <self:ACharExpr> */
+var3 = self->attrs[COLOR_nit__literal__ACharExpr___value].val; /* _value on <self:ACharExpr> */
 var1 = var3;
 RET_LABEL2:(void)0;
 }
 }
+if (unlikely(var1 == NULL)) {
+PRINT_ERROR("Runtime error: %s", "Cast failed");
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 2908);
+fatal_exit(1);
+}
 {
-var4 = nit__lexer_work___Token___text(var1);
+var5 = (uint32_t)((long)(var1)>>2);
+var4 = nit___nit__AbstractCompilerVisitor___char_instance(var_v, var5);
+}
+var = var4;
+goto RET_LABEL;
+RET_LABEL:;
+return var;
 }
-var5 = NEW_standard__Array(&type_standard__Array__standard__Object);
-{ /* var5 = array_instance Array[Object] */
-var6 = 1;
-var7 = NEW_standard__NativeArray(var6, &type_standard__NativeArray__standard__Object);
-((struct instance_standard__NativeArray*)var7)->values[0] = (val*) var4;
+/* method abstract_compiler#AArrayExpr#expr for (self: AArrayExpr, AbstractCompilerVisitor): nullable RuntimeVariable */
+val* nit__abstract_compiler___AArrayExpr___AExpr__expr(val* self, val* p0) {
+val* var /* : nullable RuntimeVariable */;
+val* var_v /* var v: AbstractCompilerVisitor */;
+val* var1 /* : nullable MType */;
+val* var3 /* : nullable MType */;
+val* var_mtype /* var mtype: MType */;
+val* var4 /* : Array[RuntimeVariable] */;
+val* var_array /* var array: Array[RuntimeVariable] */;
+val* var5 /* : RuntimeVariable */;
+val* var_res /* var res: RuntimeVariable */;
+val* var6 /* : nullable StaticFrame */;
+val* var8 /* : nullable StaticFrame */;
+val* var9 /* : nullable RuntimeVariable */;
+val* var11 /* : nullable RuntimeVariable */;
+val* var_old_comprehension /* var old_comprehension: nullable RuntimeVariable */;
+val* var12 /* : nullable StaticFrame */;
+val* var14 /* : nullable StaticFrame */;
+val* var16 /* : ANodes[AExpr] */;
+val* var18 /* : ANodes[AExpr] */;
+val* var_ /* var : ANodes[AExpr] */;
+val* var19 /* : Iterator[ANode] */;
+val* var_20 /* var : Iterator[AExpr] */;
+short int var21 /* : Bool */;
+val* var22 /* : nullable Object */;
+val* var_nexpr /* var nexpr: AExpr */;
+val* var23 /* : nullable StaticFrame */;
+val* var25 /* : nullable StaticFrame */;
+var_v = p0;
 {
-((void (*)(val* self, val* p0, long p1))(var5->class->vft[COLOR_standard__array__Array__with_native]))(var5, var7, var6) /* with_native on <var5:Array[Object]>*/;
+{ /* Inline typing#AArrayExpr#element_mtype (self) on <self:AArrayExpr> */
+var3 = self->attrs[COLOR_nit__typing__AArrayExpr___element_mtype].val; /* _element_mtype on <self:AArrayExpr> */
+var1 = var3;
+RET_LABEL2:(void)0;
+}
+}
+if (unlikely(var1 == NULL)) {
+PRINT_ERROR("Runtime error: %s", "Cast failed");
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 2914);
+fatal_exit(1);
 }
+var_mtype = var1;
+var4 = NEW_standard__Array(&type_standard__Array__nit__RuntimeVariable);
+{
+standard___standard__Array___standard__kernel__Object__init(var4); /* Direct call array#Array#init on <var4:Array[RuntimeVariable]>*/
 }
+var_array = var4;
 {
-var8 = ((val* (*)(val* self))(var5->class->vft[COLOR_standard__string__Object__to_s]))(var5) /* to_s on <var5:Array[Object]>*/;
+var5 = nit___nit__SeparateCompilerVisitor___nit__abstract_compiler__AbstractCompilerVisitor__array_instance(var_v, var_array, var_mtype);
 }
+var_res = var5;
 {
-{ /* Inline typing#AExpr#mtype (self) on <self:AFloatExpr> */
-var11 = self->attrs[COLOR_nit__typing__AExpr___mtype].val; /* _mtype on <self:AFloatExpr> */
+{ /* Inline abstract_compiler#AbstractCompilerVisitor#frame (var_v) on <var_v:AbstractCompilerVisitor> */
+var8 = var_v->attrs[COLOR_nit__abstract_compiler__AbstractCompilerVisitor___frame].val; /* _frame on <var_v:AbstractCompilerVisitor> */
+var6 = var8;
+RET_LABEL7:(void)0;
+}
+}
+if (var6 == NULL) {
+PRINT_ERROR("Runtime error: %s", "Receiver is null");
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 2918);
+fatal_exit(1);
+} else {
+{ /* Inline abstract_compiler#StaticFrame#comprehension (var6) on <var6:nullable StaticFrame> */
+if (unlikely(var6 == NULL)) {
+PRINT_ERROR("Runtime error: %s", "Receiver is null");
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 1848);
+fatal_exit(1);
+}
+var11 = var6->attrs[COLOR_nit__abstract_compiler__StaticFrame___comprehension].val; /* _comprehension on <var6:nullable StaticFrame> */
 var9 = var11;
 RET_LABEL10:(void)0;
 }
 }
-if (unlikely(var9 == NULL)) {
+var_old_comprehension = var9;
+{
+{ /* Inline abstract_compiler#AbstractCompilerVisitor#frame (var_v) on <var_v:AbstractCompilerVisitor> */
+var14 = var_v->attrs[COLOR_nit__abstract_compiler__AbstractCompilerVisitor___frame].val; /* _frame on <var_v:AbstractCompilerVisitor> */
+var12 = var14;
+RET_LABEL13:(void)0;
+}
+}
+if (var12 == NULL) {
+PRINT_ERROR("Runtime error: %s", "Receiver is null");
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 2919);
+fatal_exit(1);
+} else {
+{ /* Inline abstract_compiler#StaticFrame#comprehension= (var12,var_res) on <var12:nullable StaticFrame> */
+if (unlikely(var12 == NULL)) {
+PRINT_ERROR("Runtime error: %s", "Receiver is null");
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 1848);
+fatal_exit(1);
+}
+var12->attrs[COLOR_nit__abstract_compiler__StaticFrame___comprehension].val = var_res; /* _comprehension on <var12:nullable StaticFrame> */
+RET_LABEL15:(void)0;
+}
+}
+{
+{ /* Inline parser_nodes#AArrayExpr#n_exprs (self) on <self:AArrayExpr> */
+var18 = self->attrs[COLOR_nit__parser_nodes__AArrayExpr___n_exprs].val; /* _n_exprs on <self:AArrayExpr> */
+if (unlikely(var18 == NULL)) {
+PRINT_ERROR("Runtime error: %s", "Uninitialized attribute _n_exprs");
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__parser_nodes, 2456);
+fatal_exit(1);
+}
+var16 = var18;
+RET_LABEL17:(void)0;
+}
+}
+var_ = var16;
+{
+var19 = nit___nit__ANodes___standard__abstract_collection__Collection__iterator(var_);
+}
+var_20 = var19;
+for(;;) {
+{
+var21 = ((short int(*)(val* self))((((long)var_20&3)?class_info[((long)var_20&3)]:var_20->class)->vft[COLOR_standard__abstract_collection__Iterator__is_ok]))(var_20); /* is_ok on <var_20:Iterator[AExpr]>*/
+}
+if (var21){
+{
+var22 = ((val*(*)(val* self))((((long)var_20&3)?class_info[((long)var_20&3)]:var_20->class)->vft[COLOR_standard__abstract_collection__Iterator__item]))(var_20); /* item on <var_20:Iterator[AExpr]>*/
+}
+var_nexpr = var22;
+{
+nit___nit__AbstractCompilerVisitor___stmt(var_v, var_nexpr); /* Direct call abstract_compiler#AbstractCompilerVisitor#stmt on <var_v:AbstractCompilerVisitor>*/
+}
+{
+((void(*)(val* self))((((long)var_20&3)?class_info[((long)var_20&3)]:var_20->class)->vft[COLOR_standard__abstract_collection__Iterator__next]))(var_20); /* next on <var_20:Iterator[AExpr]>*/
+}
+} else {
+goto BREAK_label;
+}
+}
+BREAK_label: (void)0;
+{
+((void(*)(val* self))((((long)var_20&3)?class_info[((long)var_20&3)]:var_20->class)->vft[COLOR_standard__abstract_collection__Iterator__finish]))(var_20); /* finish on <var_20:Iterator[AExpr]>*/
+}
+{
+{ /* Inline abstract_compiler#AbstractCompilerVisitor#frame (var_v) on <var_v:AbstractCompilerVisitor> */
+var25 = var_v->attrs[COLOR_nit__abstract_compiler__AbstractCompilerVisitor___frame].val; /* _frame on <var_v:AbstractCompilerVisitor> */
+var23 = var25;
+RET_LABEL24:(void)0;
+}
+}
+if (var23 == NULL) {
+PRINT_ERROR("Runtime error: %s", "Receiver is null");
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 2923);
+fatal_exit(1);
+} else {
+{ /* Inline abstract_compiler#StaticFrame#comprehension= (var23,var_old_comprehension) on <var23:nullable StaticFrame> */
+if (unlikely(var23 == NULL)) {
+PRINT_ERROR("Runtime error: %s", "Receiver is null");
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 1848);
+fatal_exit(1);
+}
+var23->attrs[COLOR_nit__abstract_compiler__StaticFrame___comprehension].val = var_old_comprehension; /* _comprehension on <var23:nullable StaticFrame> */
+RET_LABEL26:(void)0;
+}
+}
+var = var_res;
+goto RET_LABEL;
+RET_LABEL:;
+return var;
+}
+/* method abstract_compiler#AStringFormExpr#expr for (self: AStringFormExpr, AbstractCompilerVisitor): nullable RuntimeVariable */
+val* nit__abstract_compiler___AStringFormExpr___AExpr__expr(val* self, val* p0) {
+val* var /* : nullable RuntimeVariable */;
+val* var_v /* var v: AbstractCompilerVisitor */;
+val* var1 /* : nullable String */;
+val* var3 /* : nullable String */;
+val* var4 /* : RuntimeVariable */;
+var_v = p0;
+{
+{ /* Inline literal#AStringFormExpr#value (self) on <self:AStringFormExpr> */
+var3 = self->attrs[COLOR_nit__literal__AStringFormExpr___value].val; /* _value on <self:AStringFormExpr> */
+var1 = var3;
+RET_LABEL2:(void)0;
+}
+}
+if (unlikely(var1 == NULL)) {
 PRINT_ERROR("Runtime error: %s", "Cast failed");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 2699);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 2930);
+fatal_exit(1);
 }
 {
-var12 = nit___nit__AbstractCompilerVisitor___new_expr(var_v, var8, var9);
+var4 = nit___nit__AbstractCompilerVisitor___string_instance(var_v, var1);
 }
-var = var12;
+var = var4;
 goto RET_LABEL;
 RET_LABEL:;
 return var;
 }
-/* method abstract_compiler#ACharExpr#expr for (self: ACharExpr, AbstractCompilerVisitor): nullable RuntimeVariable */
-val* nit__abstract_compiler___ACharExpr___AExpr__expr(val* self, val* p0) {
+/* method abstract_compiler#ASuperstringExpr#expr for (self: ASuperstringExpr, AbstractCompilerVisitor): nullable RuntimeVariable */
+val* nit__abstract_compiler___ASuperstringExpr___AExpr__expr(val* self, val* p0) {
 val* var /* : nullable RuntimeVariable */;
 val* var_v /* var v: AbstractCompilerVisitor */;
+val* var1 /* : nullable MType */;
+val* var3 /* : nullable MType */;
+val* var_type_string /* var type_string: MType */;
+val* var4 /* : Array[AExpr] */;
+val* var_array /* var array: Array[AExpr] */;
+val* var5 /* : ANodes[AExpr] */;
+val* var7 /* : ANodes[AExpr] */;
+val* var_ /* var : ANodes[AExpr] */;
+val* var8 /* : Iterator[ANode] */;
+val* var_9 /* var : Iterator[AExpr] */;
+short int var10 /* : Bool */;
+val* var11 /* : nullable Object */;
+val* var_ne /* var ne: AExpr */;
+short int var12 /* : Bool */;
+short int var13 /* : Bool */;
+int cltype;
+int idtype;
+short int var_14 /* var : Bool */;
+val* var15 /* : nullable String */;
+val* var17 /* : nullable String */;
 static val* varonce;
-val* var1 /* : String */;
-char* var2 /* : NativeString */;
-long var3 /* : Int */;
-val* var4 /* : FlatString */;
-val* var5 /* : nullable Char */;
-val* var7 /* : nullable Char */;
-val* var8 /* : String */;
-char var9 /* : Char */;
-val* var10 /* : String */;
-static val* varonce11;
-val* var12 /* : String */;
-char* var13 /* : NativeString */;
-long var14 /* : Int */;
-val* var15 /* : FlatString */;
-val* var16 /* : Array[Object] */;
-long var17 /* : Int */;
-val* var18 /* : NativeArray[Object] */;
-val* var19 /* : String */;
-val* var20 /* : nullable MType */;
-val* var22 /* : nullable MType */;
-val* var23 /* : RuntimeVariable */;
+val* var18 /* : String */;
+char* var19 /* : NativeString */;
+val* var20 /* : FlatString */;
+short int var21 /* : Bool */;
+short int var22 /* : Bool */;
+static val* varonce24;
+val* var25 /* : String */;
+char* var26 /* : NativeString */;
+val* var27 /* : FlatString */;
+val* var28 /* : String */;
+val* var_varonce /* var varonce: String */;
+val* var30 /* : NativeArray[String] */;
+static val* varonce29;
+static val* varonce31;
+val* var32 /* : String */;
+char* var33 /* : NativeString */;
+val* var34 /* : FlatString */;
+static val* varonce35;
+val* var36 /* : String */;
+char* var37 /* : NativeString */;
+val* var38 /* : FlatString */;
+val* var39 /* : String */;
+long var40 /* : Int */;
+long var42 /* : Int */;
+val* var43 /* : RuntimeVariable */;
+val* var44 /* : RuntimeVariable */;
+val* var_a /* var a: RuntimeVariable */;
+val* var46 /* : NativeArray[String] */;
+static val* varonce45;
+static val* varonce47;
+val* var48 /* : String */;
+char* var49 /* : NativeString */;
+val* var50 /* : FlatString */;
+static val* varonce51;
+val* var52 /* : String */;
+char* var53 /* : NativeString */;
+val* var54 /* : FlatString */;
+static val* varonce55;
+val* var56 /* : String */;
+char* var57 /* : NativeString */;
+val* var58 /* : FlatString */;
+val* var59 /* : MType */;
+val* var61 /* : MType */;
+val* var62 /* : String */;
+val* var63 /* : String */;
+long var_i /* var i: Int */;
+long var64 /* : Int */;
+long var66 /* : Int */;
+long var_67 /* var : Int */;
+short int var68 /* : Bool */;
+short int var70 /* : Bool */;
+int cltype71;
+int idtype72;
+const char* var_class_name;
+short int var73 /* : Bool */;
+val* var74 /* : nullable Object */;
+val* var_ne75 /* var ne: AExpr */;
+short int var76 /* : Bool */;
+int cltype77;
+int idtype78;
+short int var79 /* : Bool */;
+val* var81 /* : RuntimeVariable */;
+val* var_e /* var e: RuntimeVariable */;
+long var82 /* : Int */;
+static val* varonce84;
+val* var85 /* : String */;
+char* var86 /* : NativeString */;
+val* var87 /* : FlatString */;
+val* var89 /* : NativeArray[String] */;
+static val* varonce88;
+static val* varonce90;
+val* var91 /* : String */;
+char* var92 /* : NativeString */;
+val* var93 /* : FlatString */;
+static val* varonce94;
+val* var95 /* : String */;
+char* var96 /* : NativeString */;
+val* var97 /* : FlatString */;
+val* var98 /* : String */;
+val* var99 /* : String */;
+val* var101 /* : NativeArray[String] */;
+static val* varonce100;
+static val* varonce102;
+val* var103 /* : String */;
+char* var104 /* : NativeString */;
+val* var105 /* : FlatString */;
+val* var106 /* : String */;
+static val* varonce107;
+val* var108 /* : String */;
+char* var109 /* : NativeString */;
+val* var110 /* : FlatString */;
+static val* varonce111;
+val* var112 /* : String */;
+char* var113 /* : NativeString */;
+val* var114 /* : FlatString */;
+val* var115 /* : MClassType */;
+val* var116 /* : MMethod */;
+val* var_to_s_method /* var to_s_method: MMethod */;
+long var_i117 /* var i: Int */;
+long var118 /* : Int */;
+long var120 /* : Int */;
+long var_121 /* var : Int */;
+short int var122 /* : Bool */;
+short int var124 /* : Bool */;
+int cltype125;
+int idtype126;
+const char* var_class_name127;
+short int var128 /* : Bool */;
+val* var129 /* : nullable Object */;
+val* var_ne130 /* var ne: AExpr */;
+short int var131 /* : Bool */;
+int cltype132;
+int idtype133;
+val* var135 /* : RuntimeVariable */;
+val* var_e136 /* var e: RuntimeVariable */;
+val* var137 /* : MType */;
+val* var139 /* : MType */;
+val* var140 /* : AbstractCompiler */;
+val* var142 /* : AbstractCompiler */;
+val* var143 /* : MModule */;
+val* var145 /* : MModule */;
+short int var146 /* : Bool */;
+short int var147 /* : Bool */;
+val* var148 /* : Array[RuntimeVariable] */;
+val* var_149 /* var : Array[RuntimeVariable] */;
+val* var150 /* : nullable RuntimeVariable */;
+long var151 /* : Int */;
+static val* varonce153;
+val* var154 /* : String */;
+char* var155 /* : NativeString */;
+val* var156 /* : FlatString */;
+val* var157 /* : MType */;
+val* var159 /* : MType */;
+val* var160 /* : MMethod */;
+val* var161 /* : Array[RuntimeVariable] */;
+val* var_162 /* var : Array[RuntimeVariable] */;
+val* var163 /* : nullable RuntimeVariable */;
+val* var_res /* var res: nullable RuntimeVariable */;
+val* var165 /* : NativeArray[String] */;
+static val* varonce164;
+static val* varonce166;
+val* var167 /* : String */;
+char* var168 /* : NativeString */;
+val* var169 /* : FlatString */;
+static val* varonce170;
+val* var171 /* : String */;
+char* var172 /* : NativeString */;
+val* var173 /* : FlatString */;
+val* var174 /* : String */;
+val* var175 /* : String */;
 var_v = p0;
-if (varonce) {
-var1 = varonce;
-} else {
-var2 = "\'";
-var3 = 1;
-var4 = standard___standard__NativeString___to_s_with_length(var2, var3);
-var1 = var4;
-varonce = var1;
+{
+{ /* Inline typing#AExpr#mtype (self) on <self:ASuperstringExpr> */
+var3 = self->attrs[COLOR_nit__typing__AExpr___mtype].val; /* _mtype on <self:ASuperstringExpr> */
+var1 = var3;
+RET_LABEL2:(void)0;
+}
 }
+if (unlikely(var1 == NULL)) {
+PRINT_ERROR("Runtime error: %s", "Cast failed");
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 2936);
+fatal_exit(1);
+}
+var_type_string = var1;
+var4 = NEW_standard__Array(&type_standard__Array__nit__AExpr);
 {
-{ /* Inline literal#ACharExpr#value (self) on <self:ACharExpr> */
-var7 = self->attrs[COLOR_nit__literal__ACharExpr___value].val; /* _value on <self:ACharExpr> */
+standard___standard__Array___standard__kernel__Object__init(var4); /* Direct call array#Array#init on <var4:Array[AExpr]>*/
+}
+var_array = var4;
+{
+{ /* Inline parser_nodes#ASuperstringExpr#n_exprs (self) on <self:ASuperstringExpr> */
+var7 = self->attrs[COLOR_nit__parser_nodes__ASuperstringExpr___n_exprs].val; /* _n_exprs on <self:ASuperstringExpr> */
+if (unlikely(var7 == NULL)) {
+PRINT_ERROR("Runtime error: %s", "Uninitialized attribute _n_exprs");
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__parser_nodes, 2626);
+fatal_exit(1);
+}
 var5 = var7;
 RET_LABEL6:(void)0;
 }
 }
-if (var5 == NULL) {
-PRINT_ERROR("Runtime error: %s", "Receiver is null");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 2703);
-show_backtrace(1);
+var_ = var5;
+{
+var8 = nit___nit__ANodes___standard__abstract_collection__Collection__iterator(var_);
+}
+var_9 = var8;
+for(;;) {
+{
+var10 = ((short int(*)(val* self))((((long)var_9&3)?class_info[((long)var_9&3)]:var_9->class)->vft[COLOR_standard__abstract_collection__Iterator__is_ok]))(var_9); /* is_ok on <var_9:Iterator[AExpr]>*/
+}
+if (var10){
+{
+var11 = ((val*(*)(val* self))((((long)var_9&3)?class_info[((long)var_9&3)]:var_9->class)->vft[COLOR_standard__abstract_collection__Iterator__item]))(var_9); /* item on <var_9:Iterator[AExpr]>*/
+}
+var_ne = var11;
+/* <var_ne:AExpr> isa AStringFormExpr */
+cltype = type_nit__AStringFormExpr.color;
+idtype = type_nit__AStringFormExpr.id;
+if(cltype >= var_ne->type->table_size) {
+var13 = 0;
+} else {
+var13 = var_ne->type->type_table[cltype] == idtype;
+}
+var_14 = var13;
+if (var13){
+{
+{ /* Inline literal#AStringFormExpr#value (var_ne) on <var_ne:AExpr(AStringFormExpr)> */
+var17 = var_ne->attrs[COLOR_nit__literal__AStringFormExpr___value].val; /* _value on <var_ne:AExpr(AStringFormExpr)> */
+var15 = var17;
+RET_LABEL16:(void)0;
+}
+}
+if (likely(varonce!=NULL)) {
+var18 = varonce;
+} else {
+var19 = "";
+var20 = standard___standard__NativeString___to_s_with_length(var19, 0l);
+var18 = var20;
+varonce = var18;
+}
+if (var15 == NULL) {
+var21 = 0; /* <var18:String> cannot be null */
+} else {
+var22 = ((short int(*)(val* self, val* p0))(var15->class->vft[COLOR_standard__kernel__Object___61d_61d]))(var15, var18); /* == on <var15:nullable String>*/
+var21 = var22;
+}
+var12 = var21;
 } else {
-var9 = ((struct instance_standard__Char*)var5)->value; /* autounbox from nullable Char to Char */;
-var8 = standard__string___Char___Object__to_s(var9);
+var12 = var_14;
+}
+if (var12){
+goto BREAK_label;
+} else {
+}
+{
+standard___standard__Array___standard__abstract_collection__SimpleCollection__add(var_array, var_ne); /* Direct call array#Array#add on <var_array:Array[AExpr]>*/
+}
+BREAK_label: (void)0;
+{
+((void(*)(val* self))((((long)var_9&3)?class_info[((long)var_9&3)]:var_9->class)->vft[COLOR_standard__abstract_collection__Iterator__next]))(var_9); /* next on <var_9:Iterator[AExpr]>*/
+}
+} else {
+goto BREAK_label23;
+}
+}
+BREAK_label23: (void)0;
+{
+((void(*)(val* self))((((long)var_9&3)?class_info[((long)var_9&3)]:var_9->class)->vft[COLOR_standard__abstract_collection__Iterator__finish]))(var_9); /* finish on <var_9:Iterator[AExpr]>*/
+}
+if (likely(varonce24!=NULL)) {
+var25 = varonce24;
+} else {
+var26 = "varonce";
+var27 = standard___standard__NativeString___to_s_with_length(var26, 7l);
+var25 = var27;
+varonce24 = var25;
+}
+{
+var28 = nit___nit__AbstractCompilerVisitor___get_name(var_v, var25);
+}
+var_varonce = var28;
+if (unlikely(varonce29==NULL)) {
+var30 = NEW_standard__NativeArray(3l, &type_standard__NativeArray__standard__String);
+if (likely(varonce31!=NULL)) {
+var32 = varonce31;
+} else {
+var33 = "if (unlikely(";
+var34 = standard___standard__NativeString___to_s_with_length(var33, 13l);
+var32 = var34;
+varonce31 = var32;
+}
+((struct instance_standard__NativeArray*)var30)->values[0]=var32;
+if (likely(varonce35!=NULL)) {
+var36 = varonce35;
+} else {
+var37 = "==NULL)) {";
+var38 = standard___standard__NativeString___to_s_with_length(var37, 10l);
+var36 = var38;
+varonce35 = var36;
+}
+((struct instance_standard__NativeArray*)var30)->values[2]=var36;
+} else {
+var30 = varonce29;
+varonce29 = NULL;
+}
+((struct instance_standard__NativeArray*)var30)->values[1]=var_varonce;
+{
+var39 = ((val*(*)(val* self))(var30->class->vft[COLOR_standard__string__NativeArray__native_to_s]))(var30); /* native_to_s on <var30:NativeArray[String]>*/
+}
+varonce29 = var30;
+{
+nit___nit__AbstractCompilerVisitor___add(var_v, var39); /* Direct call abstract_compiler#AbstractCompilerVisitor#add on <var_v:AbstractCompilerVisitor>*/
+}
+{
+{ /* Inline array#AbstractArrayRead#length (var_array) on <var_array:Array[AExpr]> */
+var42 = var_array->attrs[COLOR_standard__array__AbstractArrayRead___length].l; /* _length on <var_array:Array[AExpr]> */
+var40 = var42;
+RET_LABEL41:(void)0;
+}
+}
+{
+var43 = nit___nit__AbstractCompilerVisitor___int_instance(var_v, var40);
+}
+{
+var44 = ((val*(*)(val* self, val* p0, val* p1))(var_v->class->vft[COLOR_nit__abstract_compiler__AbstractCompilerVisitor__native_array_instance]))(var_v, var_type_string, var43); /* native_array_instance on <var_v:AbstractCompilerVisitor>*/
+}
+var_a = var44;
+if (unlikely(varonce45==NULL)) {
+var46 = NEW_standard__NativeArray(5l, &type_standard__NativeArray__standard__String);
+if (likely(varonce47!=NULL)) {
+var48 = varonce47;
+} else {
+var49 = "static ";
+var50 = standard___standard__NativeString___to_s_with_length(var49, 7l);
+var48 = var50;
+varonce47 = var48;
+}
+((struct instance_standard__NativeArray*)var46)->values[0]=var48;
+if (likely(varonce51!=NULL)) {
+var52 = varonce51;
+} else {
+var53 = " ";
+var54 = standard___standard__NativeString___to_s_with_length(var53, 1l);
+var52 = var54;
+varonce51 = var52;
+}
+((struct instance_standard__NativeArray*)var46)->values[2]=var52;
+if (likely(varonce55!=NULL)) {
+var56 = varonce55;
+} else {
+var57 = ";";
+var58 = standard___standard__NativeString___to_s_with_length(var57, 1l);
+var56 = var58;
+varonce55 = var56;
+}
+((struct instance_standard__NativeArray*)var46)->values[4]=var56;
+} else {
+var46 = varonce45;
+varonce45 = NULL;
+}
+{
+{ /* Inline abstract_compiler#RuntimeVariable#mtype (var_a) on <var_a:RuntimeVariable> */
+var61 = var_a->attrs[COLOR_nit__abstract_compiler__RuntimeVariable___mtype].val; /* _mtype on <var_a:RuntimeVariable> */
+if (unlikely(var61 == NULL)) {
+PRINT_ERROR("Runtime error: %s", "Uninitialized attribute _mtype");
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 1784);
+fatal_exit(1);
 }
-{
-var10 = standard___standard__Text___escape_to_c(var8);
+var59 = var61;
+RET_LABEL60:(void)0;
 }
-if (varonce11) {
-var12 = varonce11;
-} else {
-var13 = "\'";
-var14 = 1;
-var15 = standard___standard__NativeString___to_s_with_length(var13, var14);
-var12 = var15;
-varonce11 = var12;
 }
-var16 = NEW_standard__Array(&type_standard__Array__standard__Object);
-{ /* var16 = array_instance Array[Object] */
-var17 = 3;
-var18 = NEW_standard__NativeArray(var17, &type_standard__NativeArray__standard__Object);
-((struct instance_standard__NativeArray*)var18)->values[0] = (val*) var1;
-((struct instance_standard__NativeArray*)var18)->values[1] = (val*) var10;
-((struct instance_standard__NativeArray*)var18)->values[2] = (val*) var12;
 {
-((void (*)(val* self, val* p0, long p1))(var16->class->vft[COLOR_standard__array__Array__with_native]))(var16, var18, var17) /* with_native on <var16:Array[Object]>*/;
-}
+var62 = ((val*(*)(val* self))(var59->class->vft[COLOR_nit__abstract_compiler__MType__ctype]))(var59); /* ctype on <var59:MType>*/
 }
+((struct instance_standard__NativeArray*)var46)->values[1]=var62;
+((struct instance_standard__NativeArray*)var46)->values[3]=var_varonce;
 {
-var19 = ((val* (*)(val* self))(var16->class->vft[COLOR_standard__string__Object__to_s]))(var16) /* to_s on <var16:Array[Object]>*/;
+var63 = ((val*(*)(val* self))(var46->class->vft[COLOR_standard__string__NativeArray__native_to_s]))(var46); /* native_to_s on <var46:NativeArray[String]>*/
 }
+varonce45 = var46;
 {
-{ /* Inline typing#AExpr#mtype (self) on <self:ACharExpr> */
-var22 = self->attrs[COLOR_nit__typing__AExpr___mtype].val; /* _mtype on <self:ACharExpr> */
-var20 = var22;
-RET_LABEL21:(void)0;
+nit___nit__AbstractCompilerVisitor___add_decl(var_v, var63); /* Direct call abstract_compiler#AbstractCompilerVisitor#add_decl on <var_v:AbstractCompilerVisitor>*/
 }
+var_i = 0l;
+{
+{ /* Inline array#AbstractArrayRead#length (var_array) on <var_array:Array[AExpr]> */
+var66 = var_array->attrs[COLOR_standard__array__AbstractArrayRead___length].l; /* _length on <var_array:Array[AExpr]> */
+var64 = var66;
+RET_LABEL65:(void)0;
 }
-if (unlikely(var20 == NULL)) {
-PRINT_ERROR("Runtime error: %s", "Cast failed");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 2703);
-show_backtrace(1);
 }
+var_67 = var64;
+for(;;) {
 {
-var23 = nit___nit__AbstractCompilerVisitor___new_expr(var_v, var19, var20);
+{ /* Inline kernel#Int#< (var_i,var_67) on <var_i:Int> */
+/* Covariant cast for argument 0 (i) <var_67:Int> isa OTHER */
+/* <var_67:Int> isa OTHER */
+var70 = 1; /* easy <var_67:Int> isa OTHER*/
+if (unlikely(!var70)) {
+var_class_name = type_standard__Int.name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name);
+PRINT_ERROR(" (%s:%d)\n", FILE_standard__kernel, 534);
+fatal_exit(1);
 }
-var = var23;
-goto RET_LABEL;
-RET_LABEL:;
-return var;
+var73 = var_i < var_67;
+var68 = var73;
+goto RET_LABEL69;
+RET_LABEL69:(void)0;
 }
-/* method abstract_compiler#AArrayExpr#expr for (self: AArrayExpr, AbstractCompilerVisitor): nullable RuntimeVariable */
-val* nit__abstract_compiler___AArrayExpr___AExpr__expr(val* self, val* p0) {
-val* var /* : nullable RuntimeVariable */;
-val* var_v /* var v: AbstractCompilerVisitor */;
-val* var1 /* : nullable MType */;
-val* var3 /* : nullable MType */;
-val* var_mtype /* var mtype: MType */;
-val* var4 /* : Array[RuntimeVariable] */;
-val* var_array /* var array: Array[RuntimeVariable] */;
-val* var5 /* : RuntimeVariable */;
-val* var_res /* var res: RuntimeVariable */;
-val* var6 /* : nullable StaticFrame */;
-val* var8 /* : nullable StaticFrame */;
-val* var9 /* : nullable RuntimeVariable */;
-val* var11 /* : nullable RuntimeVariable */;
-val* var_old_comprehension /* var old_comprehension: nullable RuntimeVariable */;
-val* var12 /* : nullable StaticFrame */;
-val* var14 /* : nullable StaticFrame */;
-val* var16 /* : ANodes[AExpr] */;
-val* var18 /* : ANodes[AExpr] */;
-val* var_ /* var : ANodes[AExpr] */;
-val* var19 /* : Iterator[ANode] */;
-val* var_20 /* var : Iterator[AExpr] */;
-short int var21 /* : Bool */;
-val* var22 /* : nullable Object */;
-val* var_nexpr /* var nexpr: AExpr */;
-val* var24 /* : nullable StaticFrame */;
-val* var26 /* : nullable StaticFrame */;
-var_v = p0;
+}
+if (var68){
 {
-{ /* Inline typing#AArrayExpr#element_mtype (self) on <self:AArrayExpr> */
-var3 = self->attrs[COLOR_nit__typing__AArrayExpr___element_mtype].val; /* _element_mtype on <self:AArrayExpr> */
-var1 = var3;
-RET_LABEL2:(void)0;
+var74 = standard___standard__Array___standard__abstract_collection__SequenceRead___91d_93d(var_array, var_i);
 }
+var_ne75 = var74;
+/* <var_ne75:AExpr> isa AStringFormExpr */
+cltype77 = type_nit__AStringFormExpr.color;
+idtype78 = type_nit__AStringFormExpr.id;
+if(cltype77 >= var_ne75->type->table_size) {
+var76 = 0;
+} else {
+var76 = var_ne75->type->type_table[cltype77] == idtype78;
 }
-if (unlikely(var1 == NULL)) {
-PRINT_ERROR("Runtime error: %s", "Cast failed");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 2709);
-show_backtrace(1);
+var79 = !var76;
+if (var79){
+goto BREAK_label80;
+} else {
 }
-var_mtype = var1;
-var4 = NEW_standard__Array(&type_standard__Array__nit__RuntimeVariable);
 {
-standard___standard__Array___standard__kernel__Object__init(var4); /* Direct call array#Array#init on <var4:Array[RuntimeVariable]>*/
+var81 = nit___nit__AbstractCompilerVisitor___expr(var_v, var_ne75, ((val*)NULL));
 }
-var_array = var4;
+var_e = var81;
 {
-var5 = nit___nit__SeparateCompilerVisitor___nit__abstract_compiler__AbstractCompilerVisitor__array_instance(var_v, var_array, var_mtype);
+nit___nit__SeparateCompilerVisitor___nit__abstract_compiler__AbstractCompilerVisitor__native_array_set(var_v, var_a, var_i, var_e); /* Direct call separate_compiler#SeparateCompilerVisitor#native_array_set on <var_v:AbstractCompilerVisitor>*/
 }
-var_res = var5;
+BREAK_label80: (void)0;
 {
-{ /* Inline abstract_compiler#AbstractCompilerVisitor#frame (var_v) on <var_v:AbstractCompilerVisitor> */
-var8 = var_v->attrs[COLOR_nit__abstract_compiler__AbstractCompilerVisitor___frame].val; /* _frame on <var_v:AbstractCompilerVisitor> */
-var6 = var8;
-RET_LABEL7:(void)0;
-}
+var82 = standard___standard__Int___Discrete__successor(var_i, 1l);
 }
-if (var6 == NULL) {
-PRINT_ERROR("Runtime error: %s", "Receiver is null");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 2713);
-show_backtrace(1);
+var_i = var82;
 } else {
-{ /* Inline abstract_compiler#StaticFrame#comprehension (var6) on <var6:nullable StaticFrame> */
-if (unlikely(var6 == NULL)) {
-PRINT_ERROR("Runtime error: %s", "Receiver is null");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 1744);
-show_backtrace(1);
+goto BREAK_label83;
 }
-var11 = var6->attrs[COLOR_nit__abstract_compiler__StaticFrame___comprehension].val; /* _comprehension on <var6:nullable StaticFrame> */
-var9 = var11;
-RET_LABEL10:(void)0;
 }
+BREAK_label83: (void)0;
+if (likely(varonce84!=NULL)) {
+var85 = varonce84;
+} else {
+var86 = "} else {";
+var87 = standard___standard__NativeString___to_s_with_length(var86, 8l);
+var85 = var87;
+varonce84 = var85;
 }
-var_old_comprehension = var9;
 {
-{ /* Inline abstract_compiler#AbstractCompilerVisitor#frame (var_v) on <var_v:AbstractCompilerVisitor> */
-var14 = var_v->attrs[COLOR_nit__abstract_compiler__AbstractCompilerVisitor___frame].val; /* _frame on <var_v:AbstractCompilerVisitor> */
-var12 = var14;
-RET_LABEL13:(void)0;
+nit___nit__AbstractCompilerVisitor___add(var_v, var85); /* Direct call abstract_compiler#AbstractCompilerVisitor#add on <var_v:AbstractCompilerVisitor>*/
 }
+if (unlikely(varonce88==NULL)) {
+var89 = NEW_standard__NativeArray(4l, &type_standard__NativeArray__standard__String);
+if (likely(varonce90!=NULL)) {
+var91 = varonce90;
+} else {
+var92 = " = ";
+var93 = standard___standard__NativeString___to_s_with_length(var92, 3l);
+var91 = var93;
+varonce90 = var91;
 }
-if (var12 == NULL) {
-PRINT_ERROR("Runtime error: %s", "Receiver is null");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 2714);
-show_backtrace(1);
+((struct instance_standard__NativeArray*)var89)->values[1]=var91;
+if (likely(varonce94!=NULL)) {
+var95 = varonce94;
 } else {
-{ /* Inline abstract_compiler#StaticFrame#comprehension= (var12,var_res) on <var12:nullable StaticFrame> */
-if (unlikely(var12 == NULL)) {
-PRINT_ERROR("Runtime error: %s", "Receiver is null");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 1744);
-show_backtrace(1);
+var96 = ";";
+var97 = standard___standard__NativeString___to_s_with_length(var96, 1l);
+var95 = var97;
+varonce94 = var95;
 }
-var12->attrs[COLOR_nit__abstract_compiler__StaticFrame___comprehension].val = var_res; /* _comprehension on <var12:nullable StaticFrame> */
-RET_LABEL15:(void)0;
+((struct instance_standard__NativeArray*)var89)->values[3]=var95;
+} else {
+var89 = varonce88;
+varonce88 = NULL;
 }
+{
+var98 = ((val*(*)(val* self))(var_a->class->vft[COLOR_standard__string__Object__to_s]))(var_a); /* to_s on <var_a:RuntimeVariable>*/
 }
+((struct instance_standard__NativeArray*)var89)->values[0]=var98;
+((struct instance_standard__NativeArray*)var89)->values[2]=var_varonce;
 {
-{ /* Inline parser_nodes#AArrayExpr#n_exprs (self) on <self:AArrayExpr> */
-var18 = self->attrs[COLOR_nit__parser_nodes__AArrayExpr___n_exprs].val; /* _n_exprs on <self:AArrayExpr> */
-if (unlikely(var18 == NULL)) {
-PRINT_ERROR("Runtime error: %s", "Uninitialized attribute _n_exprs");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__parser_nodes, 2160);
-show_backtrace(1);
+var99 = ((val*(*)(val* self))(var89->class->vft[COLOR_standard__string__NativeArray__native_to_s]))(var89); /* native_to_s on <var89:NativeArray[String]>*/
 }
-var16 = var18;
-RET_LABEL17:(void)0;
+varonce88 = var89;
+{
+nit___nit__AbstractCompilerVisitor___add(var_v, var99); /* Direct call abstract_compiler#AbstractCompilerVisitor#add on <var_v:AbstractCompilerVisitor>*/
 }
+if (unlikely(varonce100==NULL)) {
+var101 = NEW_standard__NativeArray(2l, &type_standard__NativeArray__standard__String);
+if (likely(varonce102!=NULL)) {
+var103 = varonce102;
+} else {
+var104 = " = NULL;";
+var105 = standard___standard__NativeString___to_s_with_length(var104, 8l);
+var103 = var105;
+varonce102 = var103;
 }
-var_ = var16;
-{
-var19 = nit___nit__ANodes___standard__abstract_collection__Collection__iterator(var_);
+((struct instance_standard__NativeArray*)var101)->values[1]=var103;
+} else {
+var101 = varonce100;
+varonce100 = NULL;
 }
-var_20 = var19;
-for(;;) {
+((struct instance_standard__NativeArray*)var101)->values[0]=var_varonce;
 {
-var21 = ((short int (*)(val* self))(var_20->class->vft[COLOR_standard__abstract_collection__Iterator__is_ok]))(var_20) /* is_ok on <var_20:Iterator[AExpr]>*/;
+var106 = ((val*(*)(val* self))(var101->class->vft[COLOR_standard__string__NativeArray__native_to_s]))(var101); /* native_to_s on <var101:NativeArray[String]>*/
 }
-if (var21){
+varonce100 = var101;
 {
-var22 = ((val* (*)(val* self))(var_20->class->vft[COLOR_standard__abstract_collection__Iterator__item]))(var_20) /* item on <var_20:Iterator[AExpr]>*/;
+nit___nit__AbstractCompilerVisitor___add(var_v, var106); /* Direct call abstract_compiler#AbstractCompilerVisitor#add on <var_v:AbstractCompilerVisitor>*/
 }
-var_nexpr = var22;
-{
-nit___nit__AbstractCompilerVisitor___stmt(var_v, var_nexpr); /* Direct call abstract_compiler#AbstractCompilerVisitor#stmt on <var_v:AbstractCompilerVisitor>*/
+if (likely(varonce107!=NULL)) {
+var108 = varonce107;
+} else {
+var109 = "}";
+var110 = standard___standard__NativeString___to_s_with_length(var109, 1l);
+var108 = var110;
+varonce107 = var108;
 }
 {
-((void (*)(val* self))(var_20->class->vft[COLOR_standard__abstract_collection__Iterator__next]))(var_20) /* next on <var_20:Iterator[AExpr]>*/;
+nit___nit__AbstractCompilerVisitor___add(var_v, var108); /* Direct call abstract_compiler#AbstractCompilerVisitor#add on <var_v:AbstractCompilerVisitor>*/
 }
+if (likely(varonce111!=NULL)) {
+var112 = varonce111;
 } else {
-goto BREAK_label;
+var113 = "to_s";
+var114 = standard___standard__NativeString___to_s_with_length(var113, 4l);
+var112 = var114;
+varonce111 = var112;
 }
+{
+var115 = nit___nit__AbstractCompilerVisitor___object_type(var_v);
 }
-BREAK_label: (void)0;
 {
-{ /* Inline abstract_collection#Iterator#finish (var_20) on <var_20:Iterator[AExpr]> */
-RET_LABEL23:(void)0;
+var116 = nit___nit__AbstractCompilerVisitor___get_property(var_v, var112, var115);
+}
+var_to_s_method = var116;
+var_i117 = 0l;
+{
+{ /* Inline array#AbstractArrayRead#length (var_array) on <var_array:Array[AExpr]> */
+var120 = var_array->attrs[COLOR_standard__array__AbstractArrayRead___length].l; /* _length on <var_array:Array[AExpr]> */
+var118 = var120;
+RET_LABEL119:(void)0;
 }
 }
+var_121 = var118;
+for(;;) {
 {
-{ /* Inline abstract_compiler#AbstractCompilerVisitor#frame (var_v) on <var_v:AbstractCompilerVisitor> */
-var26 = var_v->attrs[COLOR_nit__abstract_compiler__AbstractCompilerVisitor___frame].val; /* _frame on <var_v:AbstractCompilerVisitor> */
-var24 = var26;
-RET_LABEL25:(void)0;
+{ /* Inline kernel#Int#< (var_i117,var_121) on <var_i117:Int> */
+/* Covariant cast for argument 0 (i) <var_121:Int> isa OTHER */
+/* <var_121:Int> isa OTHER */
+var124 = 1; /* easy <var_121:Int> isa OTHER*/
+if (unlikely(!var124)) {
+var_class_name127 = type_standard__Int.name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name127);
+PRINT_ERROR(" (%s:%d)\n", FILE_standard__kernel, 534);
+fatal_exit(1);
 }
+var128 = var_i117 < var_121;
+var122 = var128;
+goto RET_LABEL123;
+RET_LABEL123:(void)0;
 }
-if (var24 == NULL) {
-PRINT_ERROR("Runtime error: %s", "Receiver is null");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 2718);
-show_backtrace(1);
-} else {
-{ /* Inline abstract_compiler#StaticFrame#comprehension= (var24,var_old_comprehension) on <var24:nullable StaticFrame> */
-if (unlikely(var24 == NULL)) {
-PRINT_ERROR("Runtime error: %s", "Receiver is null");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 1744);
-show_backtrace(1);
 }
-var24->attrs[COLOR_nit__abstract_compiler__StaticFrame___comprehension].val = var_old_comprehension; /* _comprehension on <var24:nullable StaticFrame> */
-RET_LABEL27:(void)0;
+if (var122){
+{
+var129 = standard___standard__Array___standard__abstract_collection__SequenceRead___91d_93d(var_array, var_i117);
 }
+var_ne130 = var129;
+/* <var_ne130:AExpr> isa AStringFormExpr */
+cltype132 = type_nit__AStringFormExpr.color;
+idtype133 = type_nit__AStringFormExpr.id;
+if(cltype132 >= var_ne130->type->table_size) {
+var131 = 0;
+} else {
+var131 = var_ne130->type->type_table[cltype132] == idtype133;
 }
-var = var_res;
-goto RET_LABEL;
-RET_LABEL:;
-return var;
+if (var131){
+goto BREAK_label134;
+} else {
 }
-/* method abstract_compiler#AStringFormExpr#expr for (self: AStringFormExpr, AbstractCompilerVisitor): nullable RuntimeVariable */
-val* nit__abstract_compiler___AStringFormExpr___AExpr__expr(val* self, val* p0) {
-val* var /* : nullable RuntimeVariable */;
-val* var_v /* var v: AbstractCompilerVisitor */;
-val* var1 /* : nullable String */;
-val* var3 /* : nullable String */;
-val* var4 /* : RuntimeVariable */;
-var_v = p0;
 {
-{ /* Inline literal#AStringFormExpr#value (self) on <self:AStringFormExpr> */
-var3 = self->attrs[COLOR_nit__literal__AStringFormExpr___value].val; /* _value on <self:AStringFormExpr> */
-var1 = var3;
-RET_LABEL2:(void)0;
+var135 = nit___nit__AbstractCompilerVisitor___expr(var_v, var_ne130, ((val*)NULL));
+}
+var_e136 = var135;
+{
+{ /* Inline abstract_compiler#RuntimeVariable#mcasttype (var_e136) on <var_e136:RuntimeVariable> */
+var139 = var_e136->attrs[COLOR_nit__abstract_compiler__RuntimeVariable___mcasttype].val; /* _mcasttype on <var_e136:RuntimeVariable> */
+if (unlikely(var139 == NULL)) {
+PRINT_ERROR("Runtime error: %s", "Uninitialized attribute _mcasttype");
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 1787);
+fatal_exit(1);
 }
+var137 = var139;
+RET_LABEL138:(void)0;
 }
-if (unlikely(var1 == NULL)) {
-PRINT_ERROR("Runtime error: %s", "Cast failed");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 2725);
-show_backtrace(1);
 }
 {
-var4 = nit___nit__AbstractCompilerVisitor___string_instance(var_v, var1);
+{ /* Inline abstract_compiler#AbstractCompilerVisitor#compiler (var_v) on <var_v:AbstractCompilerVisitor> */
+var142 = var_v->attrs[COLOR_nit__abstract_compiler__AbstractCompilerVisitor___compiler].val; /* _compiler on <var_v:AbstractCompilerVisitor> */
+if (unlikely(var142 == NULL)) {
+PRINT_ERROR("Runtime error: %s", "Uninitialized attribute _compiler");
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 1102);
+fatal_exit(1);
 }
-var = var4;
-goto RET_LABEL;
-RET_LABEL:;
-return var;
+var140 = var142;
+RET_LABEL141:(void)0;
 }
-/* method abstract_compiler#ASuperstringExpr#expr for (self: ASuperstringExpr, AbstractCompilerVisitor): nullable RuntimeVariable */
-val* nit__abstract_compiler___ASuperstringExpr___AExpr__expr(val* self, val* p0) {
-val* var /* : nullable RuntimeVariable */;
-val* var_v /* var v: AbstractCompilerVisitor */;
-val* var1 /* : Array[RuntimeVariable] */;
-val* var_array /* var array: Array[RuntimeVariable] */;
-val* var2 /* : ANodes[AExpr] */;
-val* var4 /* : ANodes[AExpr] */;
-val* var_ /* var : ANodes[AExpr] */;
-val* var5 /* : Iterator[ANode] */;
-val* var_6 /* var : Iterator[AExpr] */;
-short int var7 /* : Bool */;
-val* var8 /* : nullable Object */;
-val* var_ne /* var ne: AExpr */;
-short int var9 /* : Bool */;
-short int var10 /* : Bool */;
-int cltype;
-int idtype;
-short int var_11 /* var : Bool */;
-val* var12 /* : nullable String */;
-val* var14 /* : nullable String */;
-static val* varonce;
-val* var15 /* : String */;
-char* var16 /* : NativeString */;
-long var17 /* : Int */;
-val* var18 /* : FlatString */;
-short int var19 /* : Bool */;
-short int var20 /* : Bool */;
-val* var21 /* : null */;
-val* var22 /* : RuntimeVariable */;
-val* var_i /* var i: RuntimeVariable */;
-val* var25 /* : MClassType */;
-val* var26 /* : RuntimeVariable */;
-val* var_a /* var a: RuntimeVariable */;
-static val* varonce27;
-val* var28 /* : String */;
-char* var29 /* : NativeString */;
-long var30 /* : Int */;
-val* var31 /* : FlatString */;
-val* var32 /* : MType */;
-val* var34 /* : MType */;
-val* var35 /* : MMethod */;
-val* var36 /* : Array[RuntimeVariable] */;
-long var37 /* : Int */;
-val* var_38 /* var : Array[RuntimeVariable] */;
-val* var39 /* : nullable RuntimeVariable */;
-val* var_res /* var res: nullable RuntimeVariable */;
-var_v = p0;
-var1 = NEW_standard__Array(&type_standard__Array__nit__RuntimeVariable);
-{
-standard___standard__Array___standard__kernel__Object__init(var1); /* Direct call array#Array#init on <var1:Array[RuntimeVariable]>*/
 }
-var_array = var1;
 {
-{ /* Inline parser_nodes#ASuperstringExpr#n_exprs (self) on <self:ASuperstringExpr> */
-var4 = self->attrs[COLOR_nit__parser_nodes__ASuperstringExpr___n_exprs].val; /* _n_exprs on <self:ASuperstringExpr> */
-if (unlikely(var4 == NULL)) {
-PRINT_ERROR("Runtime error: %s", "Uninitialized attribute _n_exprs");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__parser_nodes, 2277);
-show_backtrace(1);
+{ /* Inline abstract_compiler#AbstractCompiler#mainmodule (var140) on <var140:AbstractCompiler> */
+var145 = var140->attrs[COLOR_nit__abstract_compiler__AbstractCompiler___mainmodule].val; /* _mainmodule on <var140:AbstractCompiler> */
+if (unlikely(var145 == NULL)) {
+PRINT_ERROR("Runtime error: %s", "Uninitialized attribute _mainmodule");
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 515);
+fatal_exit(1);
 }
-var2 = var4;
-RET_LABEL3:(void)0;
+var143 = var145;
+RET_LABEL144:(void)0;
 }
 }
-var_ = var2;
 {
-var5 = nit___nit__ANodes___standard__abstract_collection__Collection__iterator(var_);
+var146 = nit___nit__MType___is_subtype(var137, var143, ((val*)NULL), var_type_string);
 }
-var_6 = var5;
-for(;;) {
+var147 = !var146;
+if (var147){
+var148 = NEW_standard__Array(&type_standard__Array__nit__RuntimeVariable);
 {
-var7 = ((short int (*)(val* self))(var_6->class->vft[COLOR_standard__abstract_collection__Iterator__is_ok]))(var_6) /* is_ok on <var_6:Iterator[AExpr]>*/;
+standard___standard__Array___with_capacity(var148, 1l); /* Direct call array#Array#with_capacity on <var148:Array[RuntimeVariable]>*/
 }
-if (var7){
+var_149 = var148;
 {
-var8 = ((val* (*)(val* self))(var_6->class->vft[COLOR_standard__abstract_collection__Iterator__item]))(var_6) /* item on <var_6:Iterator[AExpr]>*/;
-}
-var_ne = var8;
-/* <var_ne:AExpr> isa AStringFormExpr */
-cltype = type_nit__AStringFormExpr.color;
-idtype = type_nit__AStringFormExpr.id;
-if(cltype >= var_ne->type->table_size) {
-var10 = 0;
-} else {
-var10 = var_ne->type->type_table[cltype] == idtype;
+standard___standard__AbstractArray___standard__abstract_collection__Sequence__push(var_149, var_e136); /* Direct call array#AbstractArray#push on <var_149:Array[RuntimeVariable]>*/
 }
-var_11 = var10;
-if (var10){
 {
-{ /* Inline literal#AStringFormExpr#value (var_ne) on <var_ne:AExpr(AStringFormExpr)> */
-var14 = var_ne->attrs[COLOR_nit__literal__AStringFormExpr___value].val; /* _value on <var_ne:AExpr(AStringFormExpr)> */
-var12 = var14;
-RET_LABEL13:(void)0;
+var150 = nit___nit__SeparateCompilerVisitor___nit__abstract_compiler__AbstractCompilerVisitor__send(var_v, var_to_s_method, var_149);
 }
+if (unlikely(var150 == NULL)) {
+PRINT_ERROR("Runtime error: %s", "Cast failed");
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 2983);
+fatal_exit(1);
 }
-if (varonce) {
-var15 = varonce;
+var_e136 = var150;
 } else {
-var16 = "";
-var17 = 0;
-var18 = standard___standard__NativeString___to_s_with_length(var16, var17);
-var15 = var18;
-varonce = var15;
 }
-if (var12 == NULL) {
-var19 = 0; /* <var15:String> cannot be null */
-} else {
-var20 = ((short int (*)(val* self, val* p0))(var12->class->vft[COLOR_standard__kernel__Object___61d_61d]))(var12, var15) /* == on <var12:nullable String>*/;
-var19 = var20;
+{
+nit___nit__SeparateCompilerVisitor___nit__abstract_compiler__AbstractCompilerVisitor__native_array_set(var_v, var_a, var_i117, var_e136); /* Direct call separate_compiler#SeparateCompilerVisitor#native_array_set on <var_v:AbstractCompilerVisitor>*/
 }
-var9 = var19;
-} else {
-var9 = var_11;
+BREAK_label134: (void)0;
+{
+var151 = standard___standard__Int___Discrete__successor(var_i117, 1l);
 }
-if (var9){
-goto BREAK_label;
+var_i117 = var151;
 } else {
+goto BREAK_label152;
 }
-var21 = NULL;
-{
-var22 = nit___nit__AbstractCompilerVisitor___expr(var_v, var_ne, var21);
 }
-var_i = var22;
-{
-standard___standard__Array___standard__abstract_collection__SimpleCollection__add(var_array, var_i); /* Direct call array#Array#add on <var_array:Array[RuntimeVariable]>*/
+BREAK_label152: (void)0;
+if (likely(varonce153!=NULL)) {
+var154 = varonce153;
+} else {
+var155 = "native_to_s";
+var156 = standard___standard__NativeString___to_s_with_length(var155, 11l);
+var154 = var156;
+varonce153 = var154;
 }
-BREAK_label: (void)0;
 {
-((void (*)(val* self))(var_6->class->vft[COLOR_standard__abstract_collection__Iterator__next]))(var_6) /* next on <var_6:Iterator[AExpr]>*/;
+{ /* Inline abstract_compiler#RuntimeVariable#mtype (var_a) on <var_a:RuntimeVariable> */
+var159 = var_a->attrs[COLOR_nit__abstract_compiler__RuntimeVariable___mtype].val; /* _mtype on <var_a:RuntimeVariable> */
+if (unlikely(var159 == NULL)) {
+PRINT_ERROR("Runtime error: %s", "Uninitialized attribute _mtype");
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 1784);
+fatal_exit(1);
 }
-} else {
-goto BREAK_label23;
+var157 = var159;
+RET_LABEL158:(void)0;
 }
 }
-BREAK_label23: (void)0;
 {
-{ /* Inline abstract_collection#Iterator#finish (var_6) on <var_6:Iterator[AExpr]> */
-RET_LABEL24:(void)0;
-}
+var160 = nit___nit__AbstractCompilerVisitor___get_property(var_v, var154, var157);
 }
+var161 = NEW_standard__Array(&type_standard__Array__nit__RuntimeVariable);
 {
-var25 = nit___nit__AbstractCompilerVisitor___object_type(var_v);
+standard___standard__Array___with_capacity(var161, 1l); /* Direct call array#Array#with_capacity on <var161:Array[RuntimeVariable]>*/
 }
+var_162 = var161;
 {
-var26 = nit___nit__SeparateCompilerVisitor___nit__abstract_compiler__AbstractCompilerVisitor__array_instance(var_v, var_array, var25);
-}
-var_a = var26;
-if (varonce27) {
-var28 = varonce27;
-} else {
-var29 = "to_s";
-var30 = 4;
-var31 = standard___standard__NativeString___to_s_with_length(var29, var30);
-var28 = var31;
-varonce27 = var28;
+standard___standard__AbstractArray___standard__abstract_collection__Sequence__push(var_162, var_a); /* Direct call array#AbstractArray#push on <var_162:Array[RuntimeVariable]>*/
 }
 {
-{ /* Inline abstract_compiler#RuntimeVariable#mtype (var_a) on <var_a:RuntimeVariable> */
-var34 = var_a->attrs[COLOR_nit__abstract_compiler__RuntimeVariable___mtype].val; /* _mtype on <var_a:RuntimeVariable> */
-if (unlikely(var34 == NULL)) {
-PRINT_ERROR("Runtime error: %s", "Uninitialized attribute _mtype");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 1680);
-show_backtrace(1);
+var163 = nit___nit__SeparateCompilerVisitor___nit__abstract_compiler__AbstractCompilerVisitor__send(var_v, var160, var_162);
 }
-var32 = var34;
-RET_LABEL33:(void)0;
+var_res = var163;
+if (unlikely(varonce164==NULL)) {
+var165 = NEW_standard__NativeArray(4l, &type_standard__NativeArray__standard__String);
+if (likely(varonce166!=NULL)) {
+var167 = varonce166;
+} else {
+var168 = " = ";
+var169 = standard___standard__NativeString___to_s_with_length(var168, 3l);
+var167 = var169;
+varonce166 = var167;
 }
+((struct instance_standard__NativeArray*)var165)->values[1]=var167;
+if (likely(varonce170!=NULL)) {
+var171 = varonce170;
+} else {
+var172 = ";";
+var173 = standard___standard__NativeString___to_s_with_length(var172, 1l);
+var171 = var173;
+varonce170 = var171;
 }
-{
-var35 = nit___nit__AbstractCompilerVisitor___get_property(var_v, var28, var32);
+((struct instance_standard__NativeArray*)var165)->values[3]=var171;
+} else {
+var165 = varonce164;
+varonce164 = NULL;
 }
-var36 = NEW_standard__Array(&type_standard__Array__nit__RuntimeVariable);
-var37 = 1;
+((struct instance_standard__NativeArray*)var165)->values[0]=var_varonce;
 {
-standard___standard__Array___with_capacity(var36, var37); /* Direct call array#Array#with_capacity on <var36:Array[RuntimeVariable]>*/
+var174 = ((val*(*)(val* self))(var_a->class->vft[COLOR_standard__string__Object__to_s]))(var_a); /* to_s on <var_a:RuntimeVariable>*/
 }
-var_38 = var36;
+((struct instance_standard__NativeArray*)var165)->values[2]=var174;
 {
-standard___standard__AbstractArray___standard__abstract_collection__Sequence__push(var_38, var_a); /* Direct call array#AbstractArray#push on <var_38:Array[RuntimeVariable]>*/
+var175 = ((val*(*)(val* self))(var165->class->vft[COLOR_standard__string__NativeArray__native_to_s]))(var165); /* native_to_s on <var165:NativeArray[String]>*/
 }
+varonce164 = var165;
 {
-var39 = nit___nit__SeparateCompilerVisitor___nit__abstract_compiler__AbstractCompilerVisitor__send(var_v, var35, var_38);
+nit___nit__AbstractCompilerVisitor___add(var_v, var175); /* Direct call abstract_compiler#AbstractCompilerVisitor#add on <var_v:AbstractCompilerVisitor>*/
 }
-var_res = var39;
 var = var_res;
 goto RET_LABEL;
 RET_LABEL:;
@@ -2703,112 +3658,106 @@ val* var /* : nullable RuntimeVariable */;
 val* var_v /* var v: AbstractCompilerVisitor */;
 val* var1 /* : AExpr */;
 val* var3 /* : AExpr */;
-val* var4 /* : null */;
-val* var5 /* : RuntimeVariable */;
+val* var4 /* : RuntimeVariable */;
 val* var_i1 /* var i1: RuntimeVariable */;
-val* var6 /* : AExpr */;
-val* var8 /* : AExpr */;
-val* var9 /* : null */;
-val* var10 /* : RuntimeVariable */;
+val* var5 /* : AExpr */;
+val* var7 /* : AExpr */;
+val* var8 /* : RuntimeVariable */;
 val* var_i2 /* var i2: RuntimeVariable */;
+val* var9 /* : nullable MType */;
 val* var11 /* : nullable MType */;
-val* var13 /* : nullable MType */;
-short int var14 /* : Bool */;
+short int var12 /* : Bool */;
 int cltype;
 int idtype;
 const char* var_class_name;
 val* var_mtype /* var mtype: MClassType */;
-val* var15 /* : RuntimeVariable */;
+val* var13 /* : RuntimeVariable */;
 val* var_res /* var res: RuntimeVariable */;
+val* var14 /* : nullable CallSite */;
 val* var16 /* : nullable CallSite */;
-val* var18 /* : nullable CallSite */;
-val* var19 /* : Array[RuntimeVariable] */;
-long var20 /* : Int */;
+val* var17 /* : Array[RuntimeVariable] */;
 val* var_ /* var : Array[RuntimeVariable] */;
-val* var21 /* : nullable RuntimeVariable */;
+val* var18 /* : nullable RuntimeVariable */;
 var_v = p0;
 {
 { /* Inline parser_nodes#ARangeExpr#n_expr (self) on <self:ACrangeExpr> */
 var3 = self->attrs[COLOR_nit__parser_nodes__ARangeExpr___n_expr].val; /* _n_expr on <self:ACrangeExpr> */
 if (unlikely(var3 == NULL)) {
 PRINT_ERROR("Runtime error: %s", "Uninitialized attribute _n_expr");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__parser_nodes, 2124);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__parser_nodes, 2417);
+fatal_exit(1);
 }
 var1 = var3;
 RET_LABEL2:(void)0;
 }
 }
-var4 = NULL;
 {
-var5 = nit___nit__AbstractCompilerVisitor___expr(var_v, var1, var4);
+var4 = nit___nit__AbstractCompilerVisitor___expr(var_v, var1, ((val*)NULL));
 }
-var_i1 = var5;
+var_i1 = var4;
 {
 { /* Inline parser_nodes#ARangeExpr#n_expr2 (self) on <self:ACrangeExpr> */
-var8 = self->attrs[COLOR_nit__parser_nodes__ARangeExpr___n_expr2].val; /* _n_expr2 on <self:ACrangeExpr> */
-if (unlikely(var8 == NULL)) {
+var7 = self->attrs[COLOR_nit__parser_nodes__ARangeExpr___n_expr2].val; /* _n_expr2 on <self:ACrangeExpr> */
+if (unlikely(var7 == NULL)) {
 PRINT_ERROR("Runtime error: %s", "Uninitialized attribute _n_expr2");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__parser_nodes, 2127);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__parser_nodes, 2423);
+fatal_exit(1);
 }
-var6 = var8;
-RET_LABEL7:(void)0;
+var5 = var7;
+RET_LABEL6:(void)0;
 }
 }
-var9 = NULL;
 {
-var10 = nit___nit__AbstractCompilerVisitor___expr(var_v, var6, var9);
+var8 = nit___nit__AbstractCompilerVisitor___expr(var_v, var5, ((val*)NULL));
 }
-var_i2 = var10;
+var_i2 = var8;
 {
 { /* Inline typing#AExpr#mtype (self) on <self:ACrangeExpr> */
-var13 = self->attrs[COLOR_nit__typing__AExpr___mtype].val; /* _mtype on <self:ACrangeExpr> */
-var11 = var13;
-RET_LABEL12:(void)0;
+var11 = self->attrs[COLOR_nit__typing__AExpr___mtype].val; /* _mtype on <self:ACrangeExpr> */
+var9 = var11;
+RET_LABEL10:(void)0;
 }
 }
-/* <var11:nullable MType> isa MClassType */
+/* <var9:nullable MType> isa MClassType */
 cltype = type_nit__MClassType.color;
 idtype = type_nit__MClassType.id;
-if(var11 == NULL) {
-var14 = 0;
+if(var9 == NULL) {
+var12 = 0;
 } else {
-if(cltype >= var11->type->table_size) {
-var14 = 0;
+if(cltype >= var9->type->table_size) {
+var12 = 0;
 } else {
-var14 = var11->type->type_table[cltype] == idtype;
+var12 = var9->type->type_table[cltype] == idtype;
 }
 }
-if (unlikely(!var14)) {
-var_class_name = var11 == NULL ? "null" : var11->type->name;
+if (unlikely(!var12)) {
+var_class_name = var9 == NULL ? "null" : var9->type->name;
 PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "MClassType", var_class_name);
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 2748);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 3003);
+fatal_exit(1);
 }
-var_mtype = var11;
+var_mtype = var9;
 {
-var15 = ((val* (*)(val* self, val* p0))(var_v->class->vft[COLOR_nit__abstract_compiler__AbstractCompilerVisitor__init_instance]))(var_v, var_mtype) /* init_instance on <var_v:AbstractCompilerVisitor>*/;
+var13 = ((val*(*)(val* self, val* p0))(var_v->class->vft[COLOR_nit__abstract_compiler__AbstractCompilerVisitor__init_instance]))(var_v, var_mtype); /* init_instance on <var_v:AbstractCompilerVisitor>*/
 }
-var_res = var15;
+var_res = var13;
 {
 { /* Inline typing#ARangeExpr#init_callsite (self) on <self:ACrangeExpr> */
-var18 = self->attrs[COLOR_nit__typing__ARangeExpr___init_callsite].val; /* _init_callsite on <self:ACrangeExpr> */
-var16 = var18;
-RET_LABEL17:(void)0;
+var16 = self->attrs[COLOR_nit__typing__ARangeExpr___init_callsite].val; /* _init_callsite on <self:ACrangeExpr> */
+var14 = var16;
+RET_LABEL15:(void)0;
 }
 }
-if (unlikely(var16 == NULL)) {
+if (unlikely(var14 == NULL)) {
 PRINT_ERROR("Runtime error: %s", "Cast failed");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 2750);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 3005);
+fatal_exit(1);
 }
-var19 = NEW_standard__Array(&type_standard__Array__nit__RuntimeVariable);
-var20 = 3;
+var17 = NEW_standard__Array(&type_standard__Array__nit__RuntimeVariable);
 {
-standard___standard__Array___with_capacity(var19, var20); /* Direct call array#Array#with_capacity on <var19:Array[RuntimeVariable]>*/
+standard___standard__Array___with_capacity(var17, 3l); /* Direct call array#Array#with_capacity on <var17:Array[RuntimeVariable]>*/
 }
-var_ = var19;
+var_ = var17;
 {
 standard___standard__AbstractArray___standard__abstract_collection__Sequence__push(var_, var_res); /* Direct call array#AbstractArray#push on <var_:Array[RuntimeVariable]>*/
 }
@@ -2819,7 +3768,7 @@ standard___standard__AbstractArray___standard__abstract_collection__Sequence__pu
 standard___standard__AbstractArray___standard__abstract_collection__Sequence__push(var_, var_i2); /* Direct call array#AbstractArray#push on <var_:Array[RuntimeVariable]>*/
 }
 {
-var21 = ((val* (*)(val* self, val* p0, val* p1))(var_v->class->vft[COLOR_nit__abstract_compiler__AbstractCompilerVisitor__compile_callsite]))(var_v, var16, var_) /* compile_callsite on <var_v:AbstractCompilerVisitor>*/;
+var18 = ((val*(*)(val* self, val* p0, val* p1))(var_v->class->vft[COLOR_nit__abstract_compiler__AbstractCompilerVisitor__compile_callsite]))(var_v, var14, var_); /* compile_callsite on <var_v:AbstractCompilerVisitor>*/
 }
 var = var_res;
 goto RET_LABEL;
@@ -2832,112 +3781,106 @@ val* var /* : nullable RuntimeVariable */;
 val* var_v /* var v: AbstractCompilerVisitor */;
 val* var1 /* : AExpr */;
 val* var3 /* : AExpr */;
-val* var4 /* : null */;
-val* var5 /* : RuntimeVariable */;
+val* var4 /* : RuntimeVariable */;
 val* var_i1 /* var i1: RuntimeVariable */;
-val* var6 /* : AExpr */;
-val* var8 /* : AExpr */;
-val* var9 /* : null */;
-val* var10 /* : RuntimeVariable */;
+val* var5 /* : AExpr */;
+val* var7 /* : AExpr */;
+val* var8 /* : RuntimeVariable */;
 val* var_i2 /* var i2: RuntimeVariable */;
+val* var9 /* : nullable MType */;
 val* var11 /* : nullable MType */;
-val* var13 /* : nullable MType */;
-short int var14 /* : Bool */;
+short int var12 /* : Bool */;
 int cltype;
 int idtype;
 const char* var_class_name;
 val* var_mtype /* var mtype: MClassType */;
-val* var15 /* : RuntimeVariable */;
+val* var13 /* : RuntimeVariable */;
 val* var_res /* var res: RuntimeVariable */;
+val* var14 /* : nullable CallSite */;
 val* var16 /* : nullable CallSite */;
-val* var18 /* : nullable CallSite */;
-val* var19 /* : Array[RuntimeVariable] */;
-long var20 /* : Int */;
+val* var17 /* : Array[RuntimeVariable] */;
 val* var_ /* var : Array[RuntimeVariable] */;
-val* var21 /* : nullable RuntimeVariable */;
+val* var18 /* : nullable RuntimeVariable */;
 var_v = p0;
 {
 { /* Inline parser_nodes#ARangeExpr#n_expr (self) on <self:AOrangeExpr> */
 var3 = self->attrs[COLOR_nit__parser_nodes__ARangeExpr___n_expr].val; /* _n_expr on <self:AOrangeExpr> */
 if (unlikely(var3 == NULL)) {
 PRINT_ERROR("Runtime error: %s", "Uninitialized attribute _n_expr");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__parser_nodes, 2124);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__parser_nodes, 2417);
+fatal_exit(1);
 }
 var1 = var3;
 RET_LABEL2:(void)0;
 }
 }
-var4 = NULL;
 {
-var5 = nit___nit__AbstractCompilerVisitor___expr(var_v, var1, var4);
+var4 = nit___nit__AbstractCompilerVisitor___expr(var_v, var1, ((val*)NULL));
 }
-var_i1 = var5;
+var_i1 = var4;
 {
 { /* Inline parser_nodes#ARangeExpr#n_expr2 (self) on <self:AOrangeExpr> */
-var8 = self->attrs[COLOR_nit__parser_nodes__ARangeExpr___n_expr2].val; /* _n_expr2 on <self:AOrangeExpr> */
-if (unlikely(var8 == NULL)) {
+var7 = self->attrs[COLOR_nit__parser_nodes__ARangeExpr___n_expr2].val; /* _n_expr2 on <self:AOrangeExpr> */
+if (unlikely(var7 == NULL)) {
 PRINT_ERROR("Runtime error: %s", "Uninitialized attribute _n_expr2");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__parser_nodes, 2127);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__parser_nodes, 2423);
+fatal_exit(1);
 }
-var6 = var8;
-RET_LABEL7:(void)0;
+var5 = var7;
+RET_LABEL6:(void)0;
 }
 }
-var9 = NULL;
 {
-var10 = nit___nit__AbstractCompilerVisitor___expr(var_v, var6, var9);
+var8 = nit___nit__AbstractCompilerVisitor___expr(var_v, var5, ((val*)NULL));
 }
-var_i2 = var10;
+var_i2 = var8;
 {
 { /* Inline typing#AExpr#mtype (self) on <self:AOrangeExpr> */
-var13 = self->attrs[COLOR_nit__typing__AExpr___mtype].val; /* _mtype on <self:AOrangeExpr> */
-var11 = var13;
-RET_LABEL12:(void)0;
+var11 = self->attrs[COLOR_nit__typing__AExpr___mtype].val; /* _mtype on <self:AOrangeExpr> */
+var9 = var11;
+RET_LABEL10:(void)0;
 }
 }
-/* <var11:nullable MType> isa MClassType */
+/* <var9:nullable MType> isa MClassType */
 cltype = type_nit__MClassType.color;
 idtype = type_nit__MClassType.id;
-if(var11 == NULL) {
-var14 = 0;
+if(var9 == NULL) {
+var12 = 0;
 } else {
-if(cltype >= var11->type->table_size) {
-var14 = 0;
+if(cltype >= var9->type->table_size) {
+var12 = 0;
 } else {
-var14 = var11->type->type_table[cltype] == idtype;
+var12 = var9->type->type_table[cltype] == idtype;
 }
 }
-if (unlikely(!var14)) {
-var_class_name = var11 == NULL ? "null" : var11->type->name;
+if (unlikely(!var12)) {
+var_class_name = var9 == NULL ? "null" : var9->type->name;
 PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "MClassType", var_class_name);
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 2760);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 3015);
+fatal_exit(1);
 }
-var_mtype = var11;
+var_mtype = var9;
 {
-var15 = ((val* (*)(val* self, val* p0))(var_v->class->vft[COLOR_nit__abstract_compiler__AbstractCompilerVisitor__init_instance]))(var_v, var_mtype) /* init_instance on <var_v:AbstractCompilerVisitor>*/;
+var13 = ((val*(*)(val* self, val* p0))(var_v->class->vft[COLOR_nit__abstract_compiler__AbstractCompilerVisitor__init_instance]))(var_v, var_mtype); /* init_instance on <var_v:AbstractCompilerVisitor>*/
 }
-var_res = var15;
+var_res = var13;
 {
 { /* Inline typing#ARangeExpr#init_callsite (self) on <self:AOrangeExpr> */
-var18 = self->attrs[COLOR_nit__typing__ARangeExpr___init_callsite].val; /* _init_callsite on <self:AOrangeExpr> */
-var16 = var18;
-RET_LABEL17:(void)0;
+var16 = self->attrs[COLOR_nit__typing__ARangeExpr___init_callsite].val; /* _init_callsite on <self:AOrangeExpr> */
+var14 = var16;
+RET_LABEL15:(void)0;
 }
 }
-if (unlikely(var16 == NULL)) {
+if (unlikely(var14 == NULL)) {
 PRINT_ERROR("Runtime error: %s", "Cast failed");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 2762);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 3017);
+fatal_exit(1);
 }
-var19 = NEW_standard__Array(&type_standard__Array__nit__RuntimeVariable);
-var20 = 3;
+var17 = NEW_standard__Array(&type_standard__Array__nit__RuntimeVariable);
 {
-standard___standard__Array___with_capacity(var19, var20); /* Direct call array#Array#with_capacity on <var19:Array[RuntimeVariable]>*/
+standard___standard__Array___with_capacity(var17, 3l); /* Direct call array#Array#with_capacity on <var17:Array[RuntimeVariable]>*/
 }
-var_ = var19;
+var_ = var17;
 {
 standard___standard__AbstractArray___standard__abstract_collection__Sequence__push(var_, var_res); /* Direct call array#AbstractArray#push on <var_:Array[RuntimeVariable]>*/
 }
@@ -2948,7 +3891,7 @@ standard___standard__AbstractArray___standard__abstract_collection__Sequence__pu
 standard___standard__AbstractArray___standard__abstract_collection__Sequence__push(var_, var_i2); /* Direct call array#AbstractArray#push on <var_:Array[RuntimeVariable]>*/
 }
 {
-var21 = ((val* (*)(val* self, val* p0, val* p1))(var_v->class->vft[COLOR_nit__abstract_compiler__AbstractCompilerVisitor__compile_callsite]))(var_v, var16, var_) /* compile_callsite on <var_v:AbstractCompilerVisitor>*/;
+var18 = ((val*(*)(val* self, val* p0, val* p1))(var_v->class->vft[COLOR_nit__abstract_compiler__AbstractCompilerVisitor__compile_callsite]))(var_v, var14, var_); /* compile_callsite on <var_v:AbstractCompilerVisitor>*/
 }
 var = var_res;
 goto RET_LABEL;
@@ -2959,40 +3902,12 @@ return var;
 val* nit__abstract_compiler___ATrueExpr___AExpr__expr(val* self, val* p0) {
 val* var /* : nullable RuntimeVariable */;
 val* var_v /* var v: AbstractCompilerVisitor */;
-static val* varonce;
-val* var1 /* : String */;
-char* var2 /* : NativeString */;
-long var3 /* : Int */;
-val* var4 /* : FlatString */;
-val* var5 /* : nullable MType */;
-val* var7 /* : nullable MType */;
-val* var8 /* : RuntimeVariable */;
+val* var1 /* : RuntimeVariable */;
 var_v = p0;
-if (varonce) {
-var1 = varonce;
-} else {
-var2 = "1";
-var3 = 1;
-var4 = standard___standard__NativeString___to_s_with_length(var2, var3);
-var1 = var4;
-varonce = var1;
-}
-{
-{ /* Inline typing#AExpr#mtype (self) on <self:ATrueExpr> */
-var7 = self->attrs[COLOR_nit__typing__AExpr___mtype].val; /* _mtype on <self:ATrueExpr> */
-var5 = var7;
-RET_LABEL6:(void)0;
-}
-}
-if (unlikely(var5 == NULL)) {
-PRINT_ERROR("Runtime error: %s", "Cast failed");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 2768);
-show_backtrace(1);
-}
 {
-var8 = nit___nit__AbstractCompilerVisitor___new_expr(var_v, var1, var5);
+var1 = nit___nit__AbstractCompilerVisitor___bool_instance(var_v, 1);
 }
-var = var8;
+var = var1;
 goto RET_LABEL;
 RET_LABEL:;
 return var;
@@ -3001,40 +3916,12 @@ return var;
 val* nit__abstract_compiler___AFalseExpr___AExpr__expr(val* self, val* p0) {
 val* var /* : nullable RuntimeVariable */;
 val* var_v /* var v: AbstractCompilerVisitor */;
-static val* varonce;
-val* var1 /* : String */;
-char* var2 /* : NativeString */;
-long var3 /* : Int */;
-val* var4 /* : FlatString */;
-val* var5 /* : nullable MType */;
-val* var7 /* : nullable MType */;
-val* var8 /* : RuntimeVariable */;
+val* var1 /* : RuntimeVariable */;
 var_v = p0;
-if (varonce) {
-var1 = varonce;
-} else {
-var2 = "0";
-var3 = 1;
-var4 = standard___standard__NativeString___to_s_with_length(var2, var3);
-var1 = var4;
-varonce = var1;
-}
-{
-{ /* Inline typing#AExpr#mtype (self) on <self:AFalseExpr> */
-var7 = self->attrs[COLOR_nit__typing__AExpr___mtype].val; /* _mtype on <self:AFalseExpr> */
-var5 = var7;
-RET_LABEL6:(void)0;
-}
-}
-if (unlikely(var5 == NULL)) {
-PRINT_ERROR("Runtime error: %s", "Cast failed");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 2772);
-show_backtrace(1);
-}
 {
-var8 = nit___nit__AbstractCompilerVisitor___new_expr(var_v, var1, var5);
+var1 = nit___nit__AbstractCompilerVisitor___bool_instance(var_v, 0);
 }
-var = var8;
+var = var1;
 goto RET_LABEL;
 RET_LABEL:;
 return var;
@@ -3043,40 +3930,12 @@ return var;
 val* nit__abstract_compiler___ANullExpr___AExpr__expr(val* self, val* p0) {
 val* var /* : nullable RuntimeVariable */;
 val* var_v /* var v: AbstractCompilerVisitor */;
-static val* varonce;
-val* var1 /* : String */;
-char* var2 /* : NativeString */;
-long var3 /* : Int */;
-val* var4 /* : FlatString */;
-val* var5 /* : nullable MType */;
-val* var7 /* : nullable MType */;
-val* var8 /* : RuntimeVariable */;
+val* var1 /* : RuntimeVariable */;
 var_v = p0;
-if (varonce) {
-var1 = varonce;
-} else {
-var2 = "NULL";
-var3 = 4;
-var4 = standard___standard__NativeString___to_s_with_length(var2, var3);
-var1 = var4;
-varonce = var1;
-}
-{
-{ /* Inline typing#AExpr#mtype (self) on <self:ANullExpr> */
-var7 = self->attrs[COLOR_nit__typing__AExpr___mtype].val; /* _mtype on <self:ANullExpr> */
-var5 = var7;
-RET_LABEL6:(void)0;
-}
-}
-if (unlikely(var5 == NULL)) {
-PRINT_ERROR("Runtime error: %s", "Cast failed");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 2776);
-show_backtrace(1);
-}
 {
-var8 = nit___nit__AbstractCompilerVisitor___new_expr(var_v, var1, var5);
+var1 = nit___nit__AbstractCompilerVisitor___null_instance(var_v);
 }
-var = var8;
+var = var1;
 goto RET_LABEL;
 RET_LABEL:;
 return var;
@@ -3087,60 +3946,56 @@ val* var /* : nullable RuntimeVariable */;
 val* var_v /* var v: AbstractCompilerVisitor */;
 val* var1 /* : AExpr */;
 val* var3 /* : AExpr */;
-val* var4 /* : null */;
-val* var5 /* : RuntimeVariable */;
+val* var4 /* : RuntimeVariable */;
 val* var_i /* var i: RuntimeVariable */;
-val* var6 /* : nullable MType */;
-val* var8 /* : nullable MType */;
+val* var5 /* : nullable MType */;
+val* var7 /* : nullable MType */;
 static val* varonce;
-val* var9 /* : String */;
-char* var10 /* : NativeString */;
-long var11 /* : Int */;
-val* var12 /* : FlatString */;
-val* var13 /* : RuntimeVariable */;
+val* var8 /* : String */;
+char* var9 /* : NativeString */;
+val* var10 /* : FlatString */;
+val* var11 /* : RuntimeVariable */;
 var_v = p0;
 {
 { /* Inline parser_nodes#AIsaExpr#n_expr (self) on <self:AIsaExpr> */
 var3 = self->attrs[COLOR_nit__parser_nodes__AIsaExpr___n_expr].val; /* _n_expr on <self:AIsaExpr> */
 if (unlikely(var3 == NULL)) {
 PRINT_ERROR("Runtime error: %s", "Uninitialized attribute _n_expr");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__parser_nodes, 1905);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__parser_nodes, 2149);
+fatal_exit(1);
 }
 var1 = var3;
 RET_LABEL2:(void)0;
 }
 }
-var4 = NULL;
 {
-var5 = nit___nit__AbstractCompilerVisitor___expr(var_v, var1, var4);
+var4 = nit___nit__AbstractCompilerVisitor___expr(var_v, var1, ((val*)NULL));
 }
-var_i = var5;
+var_i = var4;
 {
 { /* Inline typing#AIsaExpr#cast_type (self) on <self:AIsaExpr> */
-var8 = self->attrs[COLOR_nit__typing__AIsaExpr___cast_type].val; /* _cast_type on <self:AIsaExpr> */
-var6 = var8;
-RET_LABEL7:(void)0;
+var7 = self->attrs[COLOR_nit__typing__AIsaExpr___cast_type].val; /* _cast_type on <self:AIsaExpr> */
+var5 = var7;
+RET_LABEL6:(void)0;
 }
 }
-if (unlikely(var6 == NULL)) {
+if (unlikely(var5 == NULL)) {
 PRINT_ERROR("Runtime error: %s", "Cast failed");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 2783);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 3038);
+fatal_exit(1);
 }
-if (varonce) {
-var9 = varonce;
+if (likely(varonce!=NULL)) {
+var8 = varonce;
 } else {
-var10 = "isa";
-var11 = 3;
-var12 = standard___standard__NativeString___to_s_with_length(var10, var11);
-var9 = var12;
-varonce = var9;
+var9 = "isa";
+var10 = standard___standard__NativeString___to_s_with_length(var9, 3l);
+var8 = var10;
+varonce = var8;
 }
 {
-var13 = ((val* (*)(val* self, val* p0, val* p1, val* p2))(var_v->class->vft[COLOR_nit__abstract_compiler__AbstractCompilerVisitor__type_test]))(var_v, var_i, var6, var9) /* type_test on <var_v:AbstractCompilerVisitor>*/;
+var11 = ((val*(*)(val* self, val* p0, val* p1, val* p2))(var_v->class->vft[COLOR_nit__abstract_compiler__AbstractCompilerVisitor__type_test]))(var_v, var_i, var5, var8); /* type_test on <var_v:AbstractCompilerVisitor>*/
 }
-var = var13;
+var = var11;
 goto RET_LABEL;
 RET_LABEL:;
 return var;
@@ -3151,129 +4006,125 @@ val* var /* : nullable RuntimeVariable */;
 val* var_v /* var v: AbstractCompilerVisitor */;
 val* var1 /* : AExpr */;
 val* var3 /* : AExpr */;
-val* var4 /* : null */;
-val* var5 /* : RuntimeVariable */;
+val* var4 /* : RuntimeVariable */;
 val* var_i /* var i: RuntimeVariable */;
-val* var6 /* : AbstractCompiler */;
-val* var8 /* : AbstractCompiler */;
-val* var9 /* : ModelBuilder */;
-val* var11 /* : ModelBuilder */;
-val* var12 /* : ToolContext */;
-val* var14 /* : ToolContext */;
-val* var15 /* : OptionBool */;
-val* var17 /* : OptionBool */;
-val* var18 /* : nullable Object */;
-val* var20 /* : nullable Object */;
-short int var21 /* : Bool */;
-val* var22 /* : nullable MType */;
-val* var24 /* : nullable MType */;
+val* var5 /* : AbstractCompiler */;
+val* var7 /* : AbstractCompiler */;
+val* var8 /* : ModelBuilder */;
+val* var10 /* : ModelBuilder */;
+val* var11 /* : ToolContext */;
+val* var13 /* : ToolContext */;
+val* var14 /* : OptionBool */;
+val* var16 /* : OptionBool */;
+val* var17 /* : nullable Object */;
+val* var19 /* : nullable Object */;
+short int var20 /* : Bool */;
+val* var21 /* : nullable MType */;
+val* var23 /* : nullable MType */;
 static val* varonce;
-val* var25 /* : String */;
-char* var26 /* : NativeString */;
-long var27 /* : Int */;
-val* var28 /* : FlatString */;
+val* var24 /* : String */;
+char* var25 /* : NativeString */;
+val* var26 /* : FlatString */;
 var_v = p0;
 {
 { /* Inline parser_nodes#AAsCastForm#n_expr (self) on <self:AAsCastExpr> */
 var3 = self->attrs[COLOR_nit__parser_nodes__AAsCastForm___n_expr].val; /* _n_expr on <self:AAsCastExpr> */
 if (unlikely(var3 == NULL)) {
 PRINT_ERROR("Runtime error: %s", "Uninitialized attribute _n_expr");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__parser_nodes, 2299);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__parser_nodes, 2648);
+fatal_exit(1);
 }
 var1 = var3;
 RET_LABEL2:(void)0;
 }
 }
-var4 = NULL;
 {
-var5 = nit___nit__AbstractCompilerVisitor___expr(var_v, var1, var4);
+var4 = nit___nit__AbstractCompilerVisitor___expr(var_v, var1, ((val*)NULL));
 }
-var_i = var5;
+var_i = var4;
 {
 { /* Inline abstract_compiler#AbstractCompilerVisitor#compiler (var_v) on <var_v:AbstractCompilerVisitor> */
-var8 = var_v->attrs[COLOR_nit__abstract_compiler__AbstractCompilerVisitor___compiler].val; /* _compiler on <var_v:AbstractCompilerVisitor> */
-if (unlikely(var8 == NULL)) {
+var7 = var_v->attrs[COLOR_nit__abstract_compiler__AbstractCompilerVisitor___compiler].val; /* _compiler on <var_v:AbstractCompilerVisitor> */
+if (unlikely(var7 == NULL)) {
 PRINT_ERROR("Runtime error: %s", "Uninitialized attribute _compiler");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 1059);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 1102);
+fatal_exit(1);
 }
-var6 = var8;
-RET_LABEL7:(void)0;
+var5 = var7;
+RET_LABEL6:(void)0;
 }
 }
 {
-{ /* Inline abstract_compiler#AbstractCompiler#modelbuilder (var6) on <var6:AbstractCompiler> */
-var11 = var6->attrs[COLOR_nit__abstract_compiler__AbstractCompiler___modelbuilder].val; /* _modelbuilder on <var6:AbstractCompiler> */
-if (unlikely(var11 == NULL)) {
+{ /* Inline abstract_compiler#AbstractCompiler#modelbuilder (var5) on <var5:AbstractCompiler> */
+var10 = var5->attrs[COLOR_nit__abstract_compiler__AbstractCompiler___modelbuilder].val; /* _modelbuilder on <var5:AbstractCompiler> */
+if (unlikely(var10 == NULL)) {
 PRINT_ERROR("Runtime error: %s", "Uninitialized attribute _modelbuilder");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 481);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 522);
+fatal_exit(1);
 }
-var9 = var11;
-RET_LABEL10:(void)0;
+var8 = var10;
+RET_LABEL9:(void)0;
 }
 }
 {
-{ /* Inline modelbuilder_base#ModelBuilder#toolcontext (var9) on <var9:ModelBuilder> */
-var14 = var9->attrs[COLOR_nit__modelbuilder_base__ModelBuilder___toolcontext].val; /* _toolcontext on <var9:ModelBuilder> */
-if (unlikely(var14 == NULL)) {
+{ /* Inline modelbuilder_base#ModelBuilder#toolcontext (var8) on <var8:ModelBuilder> */
+var13 = var8->attrs[COLOR_nit__modelbuilder_base__ModelBuilder___toolcontext].val; /* _toolcontext on <var8:ModelBuilder> */
+if (unlikely(var13 == NULL)) {
 PRINT_ERROR("Runtime error: %s", "Uninitialized attribute _toolcontext");
 PRINT_ERROR(" (%s:%d)\n", FILE_nit__modelbuilder_base, 47);
-show_backtrace(1);
+fatal_exit(1);
 }
-var12 = var14;
-RET_LABEL13:(void)0;
+var11 = var13;
+RET_LABEL12:(void)0;
 }
 }
 {
-{ /* Inline abstract_compiler#ToolContext#opt_no_check_assert (var12) on <var12:ToolContext> */
-var17 = var12->attrs[COLOR_nit__abstract_compiler__ToolContext___opt_no_check_assert].val; /* _opt_no_check_assert on <var12:ToolContext> */
-if (unlikely(var17 == NULL)) {
+{ /* Inline abstract_compiler#ToolContext#opt_no_check_assert (var11) on <var11:ToolContext> */
+var16 = var11->attrs[COLOR_nit__abstract_compiler__ToolContext___opt_no_check_assert].val; /* _opt_no_check_assert on <var11:ToolContext> */
+if (unlikely(var16 == NULL)) {
 PRINT_ERROR("Runtime error: %s", "Uninitialized attribute _opt_no_check_assert");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 51);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 52);
+fatal_exit(1);
 }
-var15 = var17;
-RET_LABEL16:(void)0;
+var14 = var16;
+RET_LABEL15:(void)0;
 }
 }
 {
-{ /* Inline opts#Option#value (var15) on <var15:OptionBool> */
-var20 = var15->attrs[COLOR_opts__Option___value].val; /* _value on <var15:OptionBool> */
-var18 = var20;
-RET_LABEL19:(void)0;
+{ /* Inline opts#Option#value (var14) on <var14:OptionBool> */
+var19 = var14->attrs[COLOR_opts__Option___value].val; /* _value on <var14:OptionBool> */
+var17 = var19;
+RET_LABEL18:(void)0;
 }
 }
-var21 = ((struct instance_standard__Bool*)var18)->value; /* autounbox from nullable Object to Bool */;
-if (var21){
+var20 = (short int)((long)(var17)>>2);
+if (var20){
 var = var_i;
 goto RET_LABEL;
 } else {
 }
 {
 { /* Inline typing#AExpr#mtype (self) on <self:AAsCastExpr> */
-var24 = self->attrs[COLOR_nit__typing__AExpr___mtype].val; /* _mtype on <self:AAsCastExpr> */
-var22 = var24;
-RET_LABEL23:(void)0;
+var23 = self->attrs[COLOR_nit__typing__AExpr___mtype].val; /* _mtype on <self:AAsCastExpr> */
+var21 = var23;
+RET_LABEL22:(void)0;
 }
 }
-if (unlikely(var22 == NULL)) {
+if (unlikely(var21 == NULL)) {
 PRINT_ERROR("Runtime error: %s", "Cast failed");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 2793);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 3048);
+fatal_exit(1);
 }
-if (varonce) {
-var25 = varonce;
+if (likely(varonce!=NULL)) {
+var24 = varonce;
 } else {
-var26 = "as";
-var27 = 2;
-var28 = standard___standard__NativeString___to_s_with_length(var26, var27);
-var25 = var28;
-varonce = var25;
+var25 = "as";
+var26 = standard___standard__NativeString___to_s_with_length(var25, 2l);
+var24 = var26;
+varonce = var24;
 }
 {
-nit___nit__AbstractCompilerVisitor___add_cast(var_v, var_i, var22, var25); /* Direct call abstract_compiler#AbstractCompilerVisitor#add_cast on <var_v:AbstractCompilerVisitor>*/
+nit___nit__AbstractCompilerVisitor___add_cast(var_v, var_i, var21, var24); /* Direct call abstract_compiler#AbstractCompilerVisitor#add_cast on <var_v:AbstractCompilerVisitor>*/
 }
 var = var_i;
 goto RET_LABEL;
@@ -3286,234 +4137,196 @@ val* var /* : nullable RuntimeVariable */;
 val* var_v /* var v: AbstractCompilerVisitor */;
 val* var1 /* : AExpr */;
 val* var3 /* : AExpr */;
-val* var4 /* : null */;
-val* var5 /* : RuntimeVariable */;
+val* var4 /* : RuntimeVariable */;
 val* var_i /* var i: RuntimeVariable */;
-val* var6 /* : AbstractCompiler */;
-val* var8 /* : AbstractCompiler */;
-val* var9 /* : ModelBuilder */;
-val* var11 /* : ModelBuilder */;
-val* var12 /* : ToolContext */;
-val* var14 /* : ToolContext */;
-val* var15 /* : OptionBool */;
-val* var17 /* : OptionBool */;
-val* var18 /* : nullable Object */;
-val* var20 /* : nullable Object */;
-short int var21 /* : Bool */;
-val* var22 /* : MType */;
-val* var24 /* : MType */;
-val* var25 /* : String */;
+val* var5 /* : AbstractCompiler */;
+val* var7 /* : AbstractCompiler */;
+val* var8 /* : ModelBuilder */;
+val* var10 /* : ModelBuilder */;
+val* var11 /* : ToolContext */;
+val* var13 /* : ToolContext */;
+val* var14 /* : OptionBool */;
+val* var16 /* : OptionBool */;
+val* var17 /* : nullable Object */;
+val* var19 /* : nullable Object */;
+short int var20 /* : Bool */;
+val* var21 /* : MType */;
+val* var23 /* : MType */;
+short int var24 /* : Bool */;
+val* var25 /* : NativeArray[String] */;
 static val* varonce;
-val* var26 /* : String */;
-char* var27 /* : NativeString */;
-long var28 /* : Int */;
+static val* varonce26;
+val* var27 /* : String */;
+char* var28 /* : NativeString */;
 val* var29 /* : FlatString */;
-short int var30 /* : Bool */;
-val* var_other /* var other: nullable Object */;
-short int var32 /* : Bool */;
-short int var33 /* : Bool */;
-static val* varonce34;
+static val* varonce30;
+val* var31 /* : String */;
+char* var32 /* : NativeString */;
+val* var33 /* : FlatString */;
+val* var34 /* : String */;
 val* var35 /* : String */;
-char* var36 /* : NativeString */;
-long var37 /* : Int */;
-val* var38 /* : FlatString */;
-static val* varonce39;
-val* var40 /* : String */;
-char* var41 /* : NativeString */;
-long var42 /* : Int */;
+static val* varonce36;
+val* var37 /* : String */;
+char* var38 /* : NativeString */;
+val* var39 /* : FlatString */;
+static val* varonce40;
+val* var41 /* : String */;
+char* var42 /* : NativeString */;
 val* var43 /* : FlatString */;
-val* var44 /* : Array[Object] */;
-long var45 /* : Int */;
-val* var46 /* : NativeArray[Object] */;
-val* var47 /* : String */;
-static val* varonce48;
-val* var49 /* : String */;
-char* var50 /* : NativeString */;
-long var51 /* : Int */;
-val* var52 /* : FlatString */;
-static val* varonce53;
-val* var54 /* : String */;
-char* var55 /* : NativeString */;
-long var56 /* : Int */;
-val* var57 /* : FlatString */;
 var_v = p0;
 {
 { /* Inline parser_nodes#AAsCastForm#n_expr (self) on <self:AAsNotnullExpr> */
 var3 = self->attrs[COLOR_nit__parser_nodes__AAsCastForm___n_expr].val; /* _n_expr on <self:AAsNotnullExpr> */
 if (unlikely(var3 == NULL)) {
 PRINT_ERROR("Runtime error: %s", "Uninitialized attribute _n_expr");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__parser_nodes, 2299);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__parser_nodes, 2648);
+fatal_exit(1);
 }
 var1 = var3;
 RET_LABEL2:(void)0;
 }
 }
-var4 = NULL;
 {
-var5 = nit___nit__AbstractCompilerVisitor___expr(var_v, var1, var4);
+var4 = nit___nit__AbstractCompilerVisitor___expr(var_v, var1, ((val*)NULL));
 }
-var_i = var5;
+var_i = var4;
 {
 { /* Inline abstract_compiler#AbstractCompilerVisitor#compiler (var_v) on <var_v:AbstractCompilerVisitor> */
-var8 = var_v->attrs[COLOR_nit__abstract_compiler__AbstractCompilerVisitor___compiler].val; /* _compiler on <var_v:AbstractCompilerVisitor> */
-if (unlikely(var8 == NULL)) {
+var7 = var_v->attrs[COLOR_nit__abstract_compiler__AbstractCompilerVisitor___compiler].val; /* _compiler on <var_v:AbstractCompilerVisitor> */
+if (unlikely(var7 == NULL)) {
 PRINT_ERROR("Runtime error: %s", "Uninitialized attribute _compiler");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 1059);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 1102);
+fatal_exit(1);
 }
-var6 = var8;
-RET_LABEL7:(void)0;
+var5 = var7;
+RET_LABEL6:(void)0;
 }
 }
 {
-{ /* Inline abstract_compiler#AbstractCompiler#modelbuilder (var6) on <var6:AbstractCompiler> */
-var11 = var6->attrs[COLOR_nit__abstract_compiler__AbstractCompiler___modelbuilder].val; /* _modelbuilder on <var6:AbstractCompiler> */
-if (unlikely(var11 == NULL)) {
+{ /* Inline abstract_compiler#AbstractCompiler#modelbuilder (var5) on <var5:AbstractCompiler> */
+var10 = var5->attrs[COLOR_nit__abstract_compiler__AbstractCompiler___modelbuilder].val; /* _modelbuilder on <var5:AbstractCompiler> */
+if (unlikely(var10 == NULL)) {
 PRINT_ERROR("Runtime error: %s", "Uninitialized attribute _modelbuilder");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 481);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 522);
+fatal_exit(1);
 }
-var9 = var11;
-RET_LABEL10:(void)0;
+var8 = var10;
+RET_LABEL9:(void)0;
 }
 }
 {
-{ /* Inline modelbuilder_base#ModelBuilder#toolcontext (var9) on <var9:ModelBuilder> */
-var14 = var9->attrs[COLOR_nit__modelbuilder_base__ModelBuilder___toolcontext].val; /* _toolcontext on <var9:ModelBuilder> */
-if (unlikely(var14 == NULL)) {
+{ /* Inline modelbuilder_base#ModelBuilder#toolcontext (var8) on <var8:ModelBuilder> */
+var13 = var8->attrs[COLOR_nit__modelbuilder_base__ModelBuilder___toolcontext].val; /* _toolcontext on <var8:ModelBuilder> */
+if (unlikely(var13 == NULL)) {
 PRINT_ERROR("Runtime error: %s", "Uninitialized attribute _toolcontext");
 PRINT_ERROR(" (%s:%d)\n", FILE_nit__modelbuilder_base, 47);
-show_backtrace(1);
+fatal_exit(1);
 }
-var12 = var14;
-RET_LABEL13:(void)0;
+var11 = var13;
+RET_LABEL12:(void)0;
 }
 }
 {
-{ /* Inline abstract_compiler#ToolContext#opt_no_check_assert (var12) on <var12:ToolContext> */
-var17 = var12->attrs[COLOR_nit__abstract_compiler__ToolContext___opt_no_check_assert].val; /* _opt_no_check_assert on <var12:ToolContext> */
-if (unlikely(var17 == NULL)) {
+{ /* Inline abstract_compiler#ToolContext#opt_no_check_assert (var11) on <var11:ToolContext> */
+var16 = var11->attrs[COLOR_nit__abstract_compiler__ToolContext___opt_no_check_assert].val; /* _opt_no_check_assert on <var11:ToolContext> */
+if (unlikely(var16 == NULL)) {
 PRINT_ERROR("Runtime error: %s", "Uninitialized attribute _opt_no_check_assert");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 51);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 52);
+fatal_exit(1);
 }
-var15 = var17;
-RET_LABEL16:(void)0;
+var14 = var16;
+RET_LABEL15:(void)0;
 }
 }
 {
-{ /* Inline opts#Option#value (var15) on <var15:OptionBool> */
-var20 = var15->attrs[COLOR_opts__Option___value].val; /* _value on <var15:OptionBool> */
-var18 = var20;
-RET_LABEL19:(void)0;
+{ /* Inline opts#Option#value (var14) on <var14:OptionBool> */
+var19 = var14->attrs[COLOR_opts__Option___value].val; /* _value on <var14:OptionBool> */
+var17 = var19;
+RET_LABEL18:(void)0;
 }
 }
-var21 = ((struct instance_standard__Bool*)var18)->value; /* autounbox from nullable Object to Bool */;
-if (var21){
+var20 = (short int)((long)(var17)>>2);
+if (var20){
 var = var_i;
 goto RET_LABEL;
 } else {
 }
 {
 { /* Inline abstract_compiler#RuntimeVariable#mtype (var_i) on <var_i:RuntimeVariable> */
-var24 = var_i->attrs[COLOR_nit__abstract_compiler__RuntimeVariable___mtype].val; /* _mtype on <var_i:RuntimeVariable> */
-if (unlikely(var24 == NULL)) {
+var23 = var_i->attrs[COLOR_nit__abstract_compiler__RuntimeVariable___mtype].val; /* _mtype on <var_i:RuntimeVariable> */
+if (unlikely(var23 == NULL)) {
 PRINT_ERROR("Runtime error: %s", "Uninitialized attribute _mtype");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 1680);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 1784);
+fatal_exit(1);
 }
-var22 = var24;
-RET_LABEL23:(void)0;
-}
-}
-{
-var25 = ((val* (*)(val* self))(var22->class->vft[COLOR_nit__abstract_compiler__MType__ctype]))(var22) /* ctype on <var22:MType>*/;
+var21 = var23;
+RET_LABEL22:(void)0;
 }
-if (varonce) {
-var26 = varonce;
-} else {
-var27 = "val*";
-var28 = 4;
-var29 = standard___standard__NativeString___to_s_with_length(var27, var28);
-var26 = var29;
-varonce = var26;
 }
 {
-{ /* Inline kernel#Object#!= (var25,var26) on <var25:String> */
-var_other = var26;
-{
-var32 = ((short int (*)(val* self, val* p0))(var25->class->vft[COLOR_standard__kernel__Object___61d_61d]))(var25, var_other) /* == on <var25:String>*/;
-}
-var33 = !var32;
-var30 = var33;
-goto RET_LABEL31;
-RET_LABEL31:(void)0;
-}
+var24 = ((short int(*)(val* self))(var21->class->vft[COLOR_nit__abstract_compiler__MType__is_c_primitive]))(var21); /* is_c_primitive on <var21:MType>*/
 }
-if (var30){
+if (var24){
 var = var_i;
 goto RET_LABEL;
 } else {
 }
-if (varonce34) {
-var35 = varonce34;
+if (unlikely(varonce==NULL)) {
+var25 = NEW_standard__NativeArray(3l, &type_standard__NativeArray__standard__String);
+if (likely(varonce26!=NULL)) {
+var27 = varonce26;
 } else {
-var36 = "if (unlikely(";
-var37 = 13;
-var38 = standard___standard__NativeString___to_s_with_length(var36, var37);
-var35 = var38;
-varonce34 = var35;
+var28 = "if (unlikely(";
+var29 = standard___standard__NativeString___to_s_with_length(var28, 13l);
+var27 = var29;
+varonce26 = var27;
 }
-if (varonce39) {
-var40 = varonce39;
+((struct instance_standard__NativeArray*)var25)->values[0]=var27;
+if (likely(varonce30!=NULL)) {
+var31 = varonce30;
 } else {
-var41 = " == NULL)) {";
-var42 = 12;
-var43 = standard___standard__NativeString___to_s_with_length(var41, var42);
-var40 = var43;
-varonce39 = var40;
+var32 = " == NULL)) {";
+var33 = standard___standard__NativeString___to_s_with_length(var32, 12l);
+var31 = var33;
+varonce30 = var31;
 }
-var44 = NEW_standard__Array(&type_standard__Array__standard__Object);
-{ /* var44 = array_instance Array[Object] */
-var45 = 3;
-var46 = NEW_standard__NativeArray(var45, &type_standard__NativeArray__standard__Object);
-((struct instance_standard__NativeArray*)var46)->values[0] = (val*) var35;
-((struct instance_standard__NativeArray*)var46)->values[1] = (val*) var_i;
-((struct instance_standard__NativeArray*)var46)->values[2] = (val*) var40;
-{
-((void (*)(val* self, val* p0, long p1))(var44->class->vft[COLOR_standard__array__Array__with_native]))(var44, var46, var45) /* with_native on <var44:Array[Object]>*/;
+((struct instance_standard__NativeArray*)var25)->values[2]=var31;
+} else {
+var25 = varonce;
+varonce = NULL;
 }
+{
+var34 = ((val*(*)(val* self))(var_i->class->vft[COLOR_standard__string__Object__to_s]))(var_i); /* to_s on <var_i:RuntimeVariable>*/
 }
+((struct instance_standard__NativeArray*)var25)->values[1]=var34;
 {
-var47 = ((val* (*)(val* self))(var44->class->vft[COLOR_standard__string__Object__to_s]))(var44) /* to_s on <var44:Array[Object]>*/;
+var35 = ((val*(*)(val* self))(var25->class->vft[COLOR_standard__string__NativeArray__native_to_s]))(var25); /* native_to_s on <var25:NativeArray[String]>*/
 }
+varonce = var25;
 {
-nit___nit__AbstractCompilerVisitor___add(var_v, var47); /* Direct call abstract_compiler#AbstractCompilerVisitor#add on <var_v:AbstractCompilerVisitor>*/
+nit___nit__AbstractCompilerVisitor___add(var_v, var35); /* Direct call abstract_compiler#AbstractCompilerVisitor#add on <var_v:AbstractCompilerVisitor>*/
 }
-if (varonce48) {
-var49 = varonce48;
+if (likely(varonce36!=NULL)) {
+var37 = varonce36;
 } else {
-var50 = "Cast failed";
-var51 = 11;
-var52 = standard___standard__NativeString___to_s_with_length(var50, var51);
-var49 = var52;
-varonce48 = var49;
+var38 = "Cast failed";
+var39 = standard___standard__NativeString___to_s_with_length(var38, 11l);
+var37 = var39;
+varonce36 = var37;
 }
 {
-nit___nit__AbstractCompilerVisitor___add_abort(var_v, var49); /* Direct call abstract_compiler#AbstractCompilerVisitor#add_abort on <var_v:AbstractCompilerVisitor>*/
+nit___nit__AbstractCompilerVisitor___add_abort(var_v, var37); /* Direct call abstract_compiler#AbstractCompilerVisitor#add_abort on <var_v:AbstractCompilerVisitor>*/
 }
-if (varonce53) {
-var54 = varonce53;
+if (likely(varonce40!=NULL)) {
+var41 = varonce40;
 } else {
-var55 = "}";
-var56 = 1;
-var57 = standard___standard__NativeString___to_s_with_length(var55, var56);
-var54 = var57;
-varonce53 = var54;
+var42 = "}";
+var43 = standard___standard__NativeString___to_s_with_length(var42, 1l);
+var41 = var43;
+varonce40 = var41;
 }
 {
-nit___nit__AbstractCompilerVisitor___add(var_v, var54); /* Direct call abstract_compiler#AbstractCompilerVisitor#add on <var_v:AbstractCompilerVisitor>*/
+nit___nit__AbstractCompilerVisitor___add(var_v, var41); /* Direct call abstract_compiler#AbstractCompilerVisitor#add on <var_v:AbstractCompilerVisitor>*/
 }
 var = var_i;
 goto RET_LABEL;
@@ -3526,26 +4339,24 @@ val* var /* : nullable RuntimeVariable */;
 val* var_v /* var v: AbstractCompilerVisitor */;
 val* var1 /* : AExpr */;
 val* var3 /* : AExpr */;
-val* var4 /* : null */;
-val* var5 /* : RuntimeVariable */;
+val* var4 /* : RuntimeVariable */;
 var_v = p0;
 {
 { /* Inline parser_nodes#AParExpr#n_expr (self) on <self:AParExpr> */
 var3 = self->attrs[COLOR_nit__parser_nodes__AParExpr___n_expr].val; /* _n_expr on <self:AParExpr> */
 if (unlikely(var3 == NULL)) {
 PRINT_ERROR("Runtime error: %s", "Uninitialized attribute _n_expr");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__parser_nodes, 2288);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__parser_nodes, 2637);
+fatal_exit(1);
 }
 var1 = var3;
 RET_LABEL2:(void)0;
 }
 }
-var4 = NULL;
 {
-var5 = nit___nit__AbstractCompilerVisitor___expr(var_v, var1, var4);
+var4 = nit___nit__AbstractCompilerVisitor___expr(var_v, var1, ((val*)NULL));
 }
-var = var5;
+var = var4;
 goto RET_LABEL;
 RET_LABEL:;
 return var;
@@ -3560,133 +4371,112 @@ val* var_mtype /* var mtype: MType */;
 static val* varonce;
 val* var4 /* : String */;
 char* var5 /* : NativeString */;
-long var6 /* : Int */;
-val* var7 /* : FlatString */;
-val* var8 /* : String */;
+val* var6 /* : FlatString */;
+val* var7 /* : String */;
 val* var_name /* var name: String */;
-static val* varonce9;
-val* var10 /* : String */;
-char* var11 /* : NativeString */;
-long var12 /* : Int */;
-val* var13 /* : FlatString */;
-val* var14 /* : String */;
-val* var15 /* : String */;
+static val* varonce8;
+val* var9 /* : String */;
+char* var10 /* : NativeString */;
+val* var11 /* : FlatString */;
+val* var12 /* : String */;
+val* var13 /* : String */;
 val* var_guard /* var guard: String */;
+val* var15 /* : NativeArray[String] */;
+static val* varonce14;
 static val* varonce16;
 val* var17 /* : String */;
 char* var18 /* : NativeString */;
-long var19 /* : Int */;
-val* var20 /* : FlatString */;
+val* var19 /* : FlatString */;
+static val* varonce20;
 val* var21 /* : String */;
-static val* varonce22;
-val* var23 /* : String */;
-char* var24 /* : NativeString */;
-long var25 /* : Int */;
-val* var26 /* : FlatString */;
-static val* varonce27;
+char* var22 /* : NativeString */;
+val* var23 /* : FlatString */;
+static val* varonce24;
+val* var25 /* : String */;
+char* var26 /* : NativeString */;
+val* var27 /* : FlatString */;
 val* var28 /* : String */;
-char* var29 /* : NativeString */;
-long var30 /* : Int */;
-val* var31 /* : FlatString */;
-val* var32 /* : Array[Object] */;
-long var33 /* : Int */;
-val* var34 /* : NativeArray[Object] */;
-val* var35 /* : String */;
+val* var29 /* : String */;
+val* var31 /* : NativeArray[String] */;
+static val* varonce30;
+static val* varonce32;
+val* var33 /* : String */;
+char* var34 /* : NativeString */;
+val* var35 /* : FlatString */;
 static val* varonce36;
 val* var37 /* : String */;
 char* var38 /* : NativeString */;
-long var39 /* : Int */;
-val* var40 /* : FlatString */;
-static val* varonce41;
-val* var42 /* : String */;
-char* var43 /* : NativeString */;
-long var44 /* : Int */;
-val* var45 /* : FlatString */;
-val* var46 /* : Array[Object] */;
-long var47 /* : Int */;
-val* var48 /* : NativeArray[Object] */;
-val* var49 /* : String */;
-val* var50 /* : RuntimeVariable */;
+val* var39 /* : FlatString */;
+val* var40 /* : String */;
+val* var41 /* : RuntimeVariable */;
 val* var_res /* var res: RuntimeVariable */;
-static val* varonce51;
+val* var43 /* : NativeArray[String] */;
+static val* varonce42;
+static val* varonce44;
+val* var45 /* : String */;
+char* var46 /* : NativeString */;
+val* var47 /* : FlatString */;
+static val* varonce48;
+val* var49 /* : String */;
+char* var50 /* : NativeString */;
+val* var51 /* : FlatString */;
 val* var52 /* : String */;
-char* var53 /* : NativeString */;
-long var54 /* : Int */;
-val* var55 /* : FlatString */;
-static val* varonce56;
-val* var57 /* : String */;
-char* var58 /* : NativeString */;
-long var59 /* : Int */;
-val* var60 /* : FlatString */;
-val* var61 /* : Array[Object] */;
-long var62 /* : Int */;
-val* var63 /* : NativeArray[Object] */;
+val* var54 /* : NativeArray[String] */;
+static val* varonce53;
+static val* varonce55;
+val* var56 /* : String */;
+char* var57 /* : NativeString */;
+val* var58 /* : FlatString */;
+static val* varonce59;
+val* var60 /* : String */;
+char* var61 /* : NativeString */;
+val* var62 /* : FlatString */;
+val* var63 /* : String */;
 val* var64 /* : String */;
 static val* varonce65;
 val* var66 /* : String */;
 char* var67 /* : NativeString */;
-long var68 /* : Int */;
-val* var69 /* : FlatString */;
-static val* varonce70;
-val* var71 /* : String */;
-char* var72 /* : NativeString */;
-long var73 /* : Int */;
-val* var74 /* : FlatString */;
-val* var75 /* : Array[Object] */;
-long var76 /* : Int */;
-val* var77 /* : NativeArray[Object] */;
-val* var78 /* : String */;
+val* var68 /* : FlatString */;
+val* var69 /* : AExpr */;
+val* var71 /* : AExpr */;
+val* var72 /* : RuntimeVariable */;
+val* var_i /* var i: RuntimeVariable */;
+val* var74 /* : NativeArray[String] */;
+static val* varonce73;
+static val* varonce75;
+val* var76 /* : String */;
+char* var77 /* : NativeString */;
+val* var78 /* : FlatString */;
 static val* varonce79;
 val* var80 /* : String */;
 char* var81 /* : NativeString */;
-long var82 /* : Int */;
-val* var83 /* : FlatString */;
-val* var84 /* : AExpr */;
-val* var86 /* : AExpr */;
-val* var87 /* : RuntimeVariable */;
-val* var_i /* var i: RuntimeVariable */;
+val* var82 /* : FlatString */;
+val* var83 /* : String */;
+val* var84 /* : String */;
+val* var85 /* : String */;
+val* var87 /* : NativeArray[String] */;
+static val* varonce86;
 static val* varonce88;
 val* var89 /* : String */;
 char* var90 /* : NativeString */;
-long var91 /* : Int */;
-val* var92 /* : FlatString */;
-static val* varonce93;
-val* var94 /* : String */;
-char* var95 /* : NativeString */;
-long var96 /* : Int */;
-val* var97 /* : FlatString */;
-val* var98 /* : Array[Object] */;
-long var99 /* : Int */;
-val* var100 /* : NativeArray[Object] */;
+val* var91 /* : FlatString */;
+static val* varonce92;
+val* var93 /* : String */;
+char* var94 /* : NativeString */;
+val* var95 /* : FlatString */;
+val* var96 /* : String */;
+val* var97 /* : String */;
+val* var99 /* : NativeArray[String] */;
+static val* varonce98;
+static val* varonce100;
 val* var101 /* : String */;
-static val* varonce102;
-val* var103 /* : String */;
-char* var104 /* : NativeString */;
-long var105 /* : Int */;
-val* var106 /* : FlatString */;
-static val* varonce107;
-val* var108 /* : String */;
-char* var109 /* : NativeString */;
-long var110 /* : Int */;
-val* var111 /* : FlatString */;
-val* var112 /* : Array[Object] */;
-long var113 /* : Int */;
-val* var114 /* : NativeArray[Object] */;
-val* var115 /* : String */;
-static val* varonce116;
-val* var117 /* : String */;
-char* var118 /* : NativeString */;
-long var119 /* : Int */;
-val* var120 /* : FlatString */;
-val* var121 /* : Array[Object] */;
-long var122 /* : Int */;
-val* var123 /* : NativeArray[Object] */;
-val* var124 /* : String */;
-static val* varonce125;
-val* var126 /* : String */;
-char* var127 /* : NativeString */;
-long var128 /* : Int */;
-val* var129 /* : FlatString */;
+char* var102 /* : NativeString */;
+val* var103 /* : FlatString */;
+val* var104 /* : String */;
+static val* varonce105;
+val* var106 /* : String */;
+char* var107 /* : NativeString */;
+val* var108 /* : FlatString */;
 var_v = p0;
 {
 { /* Inline typing#AExpr#mtype (self) on <self:AOnceExpr> */
@@ -3697,334 +4487,321 @@ RET_LABEL2:(void)0;
 }
 if (unlikely(var1 == NULL)) {
 PRINT_ERROR("Runtime error: %s", "Cast failed");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 2820);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 3075);
+fatal_exit(1);
 }
 var_mtype = var1;
-if (varonce) {
+if (likely(varonce!=NULL)) {
 var4 = varonce;
 } else {
 var5 = "varonce";
-var6 = 7;
-var7 = standard___standard__NativeString___to_s_with_length(var5, var6);
-var4 = var7;
+var6 = standard___standard__NativeString___to_s_with_length(var5, 7l);
+var4 = var6;
 varonce = var4;
 }
 {
-var8 = nit___nit__AbstractCompilerVisitor___get_name(var_v, var4);
+var7 = nit___nit__AbstractCompilerVisitor___get_name(var_v, var4);
 }
-var_name = var8;
-if (varonce9) {
-var10 = varonce9;
+var_name = var7;
+if (likely(varonce8!=NULL)) {
+var9 = varonce8;
 } else {
-var11 = "_guard";
-var12 = 6;
-var13 = standard___standard__NativeString___to_s_with_length(var11, var12);
-var10 = var13;
-varonce9 = var10;
+var10 = "_guard";
+var11 = standard___standard__NativeString___to_s_with_length(var10, 6l);
+var9 = var11;
+varonce8 = var9;
 }
 {
-var14 = ((val* (*)(val* self, val* p0))(var_name->class->vft[COLOR_standard__string__String___43d]))(var_name, var10) /* + on <var_name:String>*/;
+var12 = ((val*(*)(val* self, val* p0))(var_name->class->vft[COLOR_standard__string__String___43d]))(var_name, var9); /* + on <var_name:String>*/
 }
 {
-var15 = nit___nit__AbstractCompilerVisitor___get_name(var_v, var14);
+var13 = nit___nit__AbstractCompilerVisitor___get_name(var_v, var12);
 }
-var_guard = var15;
-if (varonce16) {
+var_guard = var13;
+if (unlikely(varonce14==NULL)) {
+var15 = NEW_standard__NativeArray(5l, &type_standard__NativeArray__standard__String);
+if (likely(varonce16!=NULL)) {
 var17 = varonce16;
 } else {
 var18 = "static ";
-var19 = 7;
-var20 = standard___standard__NativeString___to_s_with_length(var18, var19);
-var17 = var20;
+var19 = standard___standard__NativeString___to_s_with_length(var18, 7l);
+var17 = var19;
 varonce16 = var17;
 }
-{
-var21 = ((val* (*)(val* self))(var_mtype->class->vft[COLOR_nit__abstract_compiler__MType__ctype]))(var_mtype) /* ctype on <var_mtype:MType>*/;
+((struct instance_standard__NativeArray*)var15)->values[0]=var17;
+if (likely(varonce20!=NULL)) {
+var21 = varonce20;
+} else {
+var22 = " ";
+var23 = standard___standard__NativeString___to_s_with_length(var22, 1l);
+var21 = var23;
+varonce20 = var21;
 }
-if (varonce22) {
-var23 = varonce22;
+((struct instance_standard__NativeArray*)var15)->values[2]=var21;
+if (likely(varonce24!=NULL)) {
+var25 = varonce24;
 } else {
-var24 = " ";
-var25 = 1;
-var26 = standard___standard__NativeString___to_s_with_length(var24, var25);
-var23 = var26;
-varonce22 = var23;
+var26 = ";";
+var27 = standard___standard__NativeString___to_s_with_length(var26, 1l);
+var25 = var27;
+varonce24 = var25;
 }
-if (varonce27) {
-var28 = varonce27;
+((struct instance_standard__NativeArray*)var15)->values[4]=var25;
 } else {
-var29 = ";";
-var30 = 1;
-var31 = standard___standard__NativeString___to_s_with_length(var29, var30);
-var28 = var31;
-varonce27 = var28;
+var15 = varonce14;
+varonce14 = NULL;
 }
-var32 = NEW_standard__Array(&type_standard__Array__standard__Object);
-{ /* var32 = array_instance Array[Object] */
-var33 = 5;
-var34 = NEW_standard__NativeArray(var33, &type_standard__NativeArray__standard__Object);
-((struct instance_standard__NativeArray*)var34)->values[0] = (val*) var17;
-((struct instance_standard__NativeArray*)var34)->values[1] = (val*) var21;
-((struct instance_standard__NativeArray*)var34)->values[2] = (val*) var23;
-((struct instance_standard__NativeArray*)var34)->values[3] = (val*) var_name;
-((struct instance_standard__NativeArray*)var34)->values[4] = (val*) var28;
 {
-((void (*)(val* self, val* p0, long p1))(var32->class->vft[COLOR_standard__array__Array__with_native]))(var32, var34, var33) /* with_native on <var32:Array[Object]>*/;
-}
+var28 = ((val*(*)(val* self))(var_mtype->class->vft[COLOR_nit__abstract_compiler__MType__ctype]))(var_mtype); /* ctype on <var_mtype:MType>*/
 }
+((struct instance_standard__NativeArray*)var15)->values[1]=var28;
+((struct instance_standard__NativeArray*)var15)->values[3]=var_name;
 {
-var35 = ((val* (*)(val* self))(var32->class->vft[COLOR_standard__string__Object__to_s]))(var32) /* to_s on <var32:Array[Object]>*/;
+var29 = ((val*(*)(val* self))(var15->class->vft[COLOR_standard__string__NativeArray__native_to_s]))(var15); /* native_to_s on <var15:NativeArray[String]>*/
 }
+varonce14 = var15;
 {
-nit___nit__AbstractCompilerVisitor___add_decl(var_v, var35); /* Direct call abstract_compiler#AbstractCompilerVisitor#add_decl on <var_v:AbstractCompilerVisitor>*/
+nit___nit__AbstractCompilerVisitor___add_decl(var_v, var29); /* Direct call abstract_compiler#AbstractCompilerVisitor#add_decl on <var_v:AbstractCompilerVisitor>*/
+}
+if (unlikely(varonce30==NULL)) {
+var31 = NEW_standard__NativeArray(3l, &type_standard__NativeArray__standard__String);
+if (likely(varonce32!=NULL)) {
+var33 = varonce32;
+} else {
+var34 = "static int ";
+var35 = standard___standard__NativeString___to_s_with_length(var34, 11l);
+var33 = var35;
+varonce32 = var33;
 }
-if (varonce36) {
+((struct instance_standard__NativeArray*)var31)->values[0]=var33;
+if (likely(varonce36!=NULL)) {
 var37 = varonce36;
 } else {
-var38 = "static int ";
-var39 = 11;
-var40 = standard___standard__NativeString___to_s_with_length(var38, var39);
-var37 = var40;
+var38 = ";";
+var39 = standard___standard__NativeString___to_s_with_length(var38, 1l);
+var37 = var39;
 varonce36 = var37;
 }
-if (varonce41) {
-var42 = varonce41;
+((struct instance_standard__NativeArray*)var31)->values[2]=var37;
 } else {
-var43 = ";";
-var44 = 1;
-var45 = standard___standard__NativeString___to_s_with_length(var43, var44);
-var42 = var45;
-varonce41 = var42;
+var31 = varonce30;
+varonce30 = NULL;
 }
-var46 = NEW_standard__Array(&type_standard__Array__standard__Object);
-{ /* var46 = array_instance Array[Object] */
-var47 = 3;
-var48 = NEW_standard__NativeArray(var47, &type_standard__NativeArray__standard__Object);
-((struct instance_standard__NativeArray*)var48)->values[0] = (val*) var37;
-((struct instance_standard__NativeArray*)var48)->values[1] = (val*) var_guard;
-((struct instance_standard__NativeArray*)var48)->values[2] = (val*) var42;
+((struct instance_standard__NativeArray*)var31)->values[1]=var_guard;
 {
-((void (*)(val* self, val* p0, long p1))(var46->class->vft[COLOR_standard__array__Array__with_native]))(var46, var48, var47) /* with_native on <var46:Array[Object]>*/;
-}
+var40 = ((val*(*)(val* self))(var31->class->vft[COLOR_standard__string__NativeArray__native_to_s]))(var31); /* native_to_s on <var31:NativeArray[String]>*/
 }
+varonce30 = var31;
 {
-var49 = ((val* (*)(val* self))(var46->class->vft[COLOR_standard__string__Object__to_s]))(var46) /* to_s on <var46:Array[Object]>*/;
+nit___nit__AbstractCompilerVisitor___add_decl(var_v, var40); /* Direct call abstract_compiler#AbstractCompilerVisitor#add_decl on <var_v:AbstractCompilerVisitor>*/
 }
 {
-nit___nit__AbstractCompilerVisitor___add_decl(var_v, var49); /* Direct call abstract_compiler#AbstractCompilerVisitor#add_decl on <var_v:AbstractCompilerVisitor>*/
+var41 = nit___nit__AbstractCompilerVisitor___new_var(var_v, var_mtype);
 }
-{
-var50 = nit___nit__AbstractCompilerVisitor___new_var(var_v, var_mtype);
+var_res = var41;
+if (unlikely(varonce42==NULL)) {
+var43 = NEW_standard__NativeArray(3l, &type_standard__NativeArray__standard__String);
+if (likely(varonce44!=NULL)) {
+var45 = varonce44;
+} else {
+var46 = "if (likely(";
+var47 = standard___standard__NativeString___to_s_with_length(var46, 11l);
+var45 = var47;
+varonce44 = var45;
 }
-var_res = var50;
-if (varonce51) {
-var52 = varonce51;
+((struct instance_standard__NativeArray*)var43)->values[0]=var45;
+if (likely(varonce48!=NULL)) {
+var49 = varonce48;
 } else {
-var53 = "if (";
-var54 = 4;
-var55 = standard___standard__NativeString___to_s_with_length(var53, var54);
-var52 = var55;
-varonce51 = var52;
+var50 = ")) {";
+var51 = standard___standard__NativeString___to_s_with_length(var50, 4l);
+var49 = var51;
+varonce48 = var49;
 }
-if (varonce56) {
-var57 = varonce56;
+((struct instance_standard__NativeArray*)var43)->values[2]=var49;
 } else {
-var58 = ") {";
-var59 = 3;
-var60 = standard___standard__NativeString___to_s_with_length(var58, var59);
-var57 = var60;
-varonce56 = var57;
+var43 = varonce42;
+varonce42 = NULL;
 }
-var61 = NEW_standard__Array(&type_standard__Array__standard__Object);
-{ /* var61 = array_instance Array[Object] */
-var62 = 3;
-var63 = NEW_standard__NativeArray(var62, &type_standard__NativeArray__standard__Object);
-((struct instance_standard__NativeArray*)var63)->values[0] = (val*) var52;
-((struct instance_standard__NativeArray*)var63)->values[1] = (val*) var_guard;
-((struct instance_standard__NativeArray*)var63)->values[2] = (val*) var57;
+((struct instance_standard__NativeArray*)var43)->values[1]=var_guard;
 {
-((void (*)(val* self, val* p0, long p1))(var61->class->vft[COLOR_standard__array__Array__with_native]))(var61, var63, var62) /* with_native on <var61:Array[Object]>*/;
-}
+var52 = ((val*(*)(val* self))(var43->class->vft[COLOR_standard__string__NativeArray__native_to_s]))(var43); /* native_to_s on <var43:NativeArray[String]>*/
 }
+varonce42 = var43;
 {
-var64 = ((val* (*)(val* self))(var61->class->vft[COLOR_standard__string__Object__to_s]))(var61) /* to_s on <var61:Array[Object]>*/;
+nit___nit__AbstractCompilerVisitor___add(var_v, var52); /* Direct call abstract_compiler#AbstractCompilerVisitor#add on <var_v:AbstractCompilerVisitor>*/
 }
-{
-nit___nit__AbstractCompilerVisitor___add(var_v, var64); /* Direct call abstract_compiler#AbstractCompilerVisitor#add on <var_v:AbstractCompilerVisitor>*/
+if (unlikely(varonce53==NULL)) {
+var54 = NEW_standard__NativeArray(4l, &type_standard__NativeArray__standard__String);
+if (likely(varonce55!=NULL)) {
+var56 = varonce55;
+} else {
+var57 = " = ";
+var58 = standard___standard__NativeString___to_s_with_length(var57, 3l);
+var56 = var58;
+varonce55 = var56;
 }
-if (varonce65) {
-var66 = varonce65;
+((struct instance_standard__NativeArray*)var54)->values[1]=var56;
+if (likely(varonce59!=NULL)) {
+var60 = varonce59;
 } else {
-var67 = " = ";
-var68 = 3;
-var69 = standard___standard__NativeString___to_s_with_length(var67, var68);
-var66 = var69;
-varonce65 = var66;
+var61 = ";";
+var62 = standard___standard__NativeString___to_s_with_length(var61, 1l);
+var60 = var62;
+varonce59 = var60;
 }
-if (varonce70) {
-var71 = varonce70;
+((struct instance_standard__NativeArray*)var54)->values[3]=var60;
 } else {
-var72 = ";";
-var73 = 1;
-var74 = standard___standard__NativeString___to_s_with_length(var72, var73);
-var71 = var74;
-varonce70 = var71;
+var54 = varonce53;
+varonce53 = NULL;
 }
-var75 = NEW_standard__Array(&type_standard__Array__standard__Object);
-{ /* var75 = array_instance Array[Object] */
-var76 = 4;
-var77 = NEW_standard__NativeArray(var76, &type_standard__NativeArray__standard__Object);
-((struct instance_standard__NativeArray*)var77)->values[0] = (val*) var_res;
-((struct instance_standard__NativeArray*)var77)->values[1] = (val*) var66;
-((struct instance_standard__NativeArray*)var77)->values[2] = (val*) var_name;
-((struct instance_standard__NativeArray*)var77)->values[3] = (val*) var71;
 {
-((void (*)(val* self, val* p0, long p1))(var75->class->vft[COLOR_standard__array__Array__with_native]))(var75, var77, var76) /* with_native on <var75:Array[Object]>*/;
-}
+var63 = ((val*(*)(val* self))(var_res->class->vft[COLOR_standard__string__Object__to_s]))(var_res); /* to_s on <var_res:RuntimeVariable>*/
 }
+((struct instance_standard__NativeArray*)var54)->values[0]=var63;
+((struct instance_standard__NativeArray*)var54)->values[2]=var_name;
 {
-var78 = ((val* (*)(val* self))(var75->class->vft[COLOR_standard__string__Object__to_s]))(var75) /* to_s on <var75:Array[Object]>*/;
+var64 = ((val*(*)(val* self))(var54->class->vft[COLOR_standard__string__NativeArray__native_to_s]))(var54); /* native_to_s on <var54:NativeArray[String]>*/
 }
+varonce53 = var54;
 {
-nit___nit__AbstractCompilerVisitor___add(var_v, var78); /* Direct call abstract_compiler#AbstractCompilerVisitor#add on <var_v:AbstractCompilerVisitor>*/
+nit___nit__AbstractCompilerVisitor___add(var_v, var64); /* Direct call abstract_compiler#AbstractCompilerVisitor#add on <var_v:AbstractCompilerVisitor>*/
 }
-if (varonce79) {
-var80 = varonce79;
+if (likely(varonce65!=NULL)) {
+var66 = varonce65;
 } else {
-var81 = "} else {";
-var82 = 8;
-var83 = standard___standard__NativeString___to_s_with_length(var81, var82);
-var80 = var83;
-varonce79 = var80;
+var67 = "} else {";
+var68 = standard___standard__NativeString___to_s_with_length(var67, 8l);
+var66 = var68;
+varonce65 = var66;
 }
 {
-nit___nit__AbstractCompilerVisitor___add(var_v, var80); /* Direct call abstract_compiler#AbstractCompilerVisitor#add on <var_v:AbstractCompilerVisitor>*/
+nit___nit__AbstractCompilerVisitor___add(var_v, var66); /* Direct call abstract_compiler#AbstractCompilerVisitor#add on <var_v:AbstractCompilerVisitor>*/
 }
 {
 { /* Inline parser_nodes#AOnceExpr#n_expr (self) on <self:AOnceExpr> */
-var86 = self->attrs[COLOR_nit__parser_nodes__AOnceExpr___n_expr].val; /* _n_expr on <self:AOnceExpr> */
-if (unlikely(var86 == NULL)) {
+var71 = self->attrs[COLOR_nit__parser_nodes__AOnceExpr___n_expr].val; /* _n_expr on <self:AOnceExpr> */
+if (unlikely(var71 == NULL)) {
 PRINT_ERROR("Runtime error: %s", "Uninitialized attribute _n_expr");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__parser_nodes, 1794);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__parser_nodes, 2017);
+fatal_exit(1);
 }
-var84 = var86;
-RET_LABEL85:(void)0;
+var69 = var71;
+RET_LABEL70:(void)0;
 }
 }
 {
-var87 = nit___nit__AbstractCompilerVisitor___expr(var_v, var84, var_mtype);
+var72 = nit___nit__AbstractCompilerVisitor___expr(var_v, var69, var_mtype);
 }
-var_i = var87;
-if (varonce88) {
-var89 = varonce88;
+var_i = var72;
+if (unlikely(varonce73==NULL)) {
+var74 = NEW_standard__NativeArray(4l, &type_standard__NativeArray__standard__String);
+if (likely(varonce75!=NULL)) {
+var76 = varonce75;
 } else {
-var90 = " = ";
-var91 = 3;
-var92 = standard___standard__NativeString___to_s_with_length(var90, var91);
-var89 = var92;
-varonce88 = var89;
+var77 = " = ";
+var78 = standard___standard__NativeString___to_s_with_length(var77, 3l);
+var76 = var78;
+varonce75 = var76;
+}
+((struct instance_standard__NativeArray*)var74)->values[1]=var76;
+if (likely(varonce79!=NULL)) {
+var80 = varonce79;
+} else {
+var81 = ";";
+var82 = standard___standard__NativeString___to_s_with_length(var81, 1l);
+var80 = var82;
+varonce79 = var80;
 }
-if (varonce93) {
-var94 = varonce93;
+((struct instance_standard__NativeArray*)var74)->values[3]=var80;
 } else {
-var95 = ";";
-var96 = 1;
-var97 = standard___standard__NativeString___to_s_with_length(var95, var96);
-var94 = var97;
-varonce93 = var94;
+var74 = varonce73;
+varonce73 = NULL;
 }
-var98 = NEW_standard__Array(&type_standard__Array__standard__Object);
-{ /* var98 = array_instance Array[Object] */
-var99 = 4;
-var100 = NEW_standard__NativeArray(var99, &type_standard__NativeArray__standard__Object);
-((struct instance_standard__NativeArray*)var100)->values[0] = (val*) var_res;
-((struct instance_standard__NativeArray*)var100)->values[1] = (val*) var89;
-((struct instance_standard__NativeArray*)var100)->values[2] = (val*) var_i;
-((struct instance_standard__NativeArray*)var100)->values[3] = (val*) var94;
 {
-((void (*)(val* self, val* p0, long p1))(var98->class->vft[COLOR_standard__array__Array__with_native]))(var98, var100, var99) /* with_native on <var98:Array[Object]>*/;
+var83 = ((val*(*)(val* self))(var_res->class->vft[COLOR_standard__string__Object__to_s]))(var_res); /* to_s on <var_res:RuntimeVariable>*/
 }
+((struct instance_standard__NativeArray*)var74)->values[0]=var83;
+{
+var84 = ((val*(*)(val* self))(var_i->class->vft[COLOR_standard__string__Object__to_s]))(var_i); /* to_s on <var_i:RuntimeVariable>*/
 }
+((struct instance_standard__NativeArray*)var74)->values[2]=var84;
 {
-var101 = ((val* (*)(val* self))(var98->class->vft[COLOR_standard__string__Object__to_s]))(var98) /* to_s on <var98:Array[Object]>*/;
+var85 = ((val*(*)(val* self))(var74->class->vft[COLOR_standard__string__NativeArray__native_to_s]))(var74); /* native_to_s on <var74:NativeArray[String]>*/
 }
+varonce73 = var74;
 {
-nit___nit__AbstractCompilerVisitor___add(var_v, var101); /* Direct call abstract_compiler#AbstractCompilerVisitor#add on <var_v:AbstractCompilerVisitor>*/
+nit___nit__AbstractCompilerVisitor___add(var_v, var85); /* Direct call abstract_compiler#AbstractCompilerVisitor#add on <var_v:AbstractCompilerVisitor>*/
 }
-if (varonce102) {
-var103 = varonce102;
+if (unlikely(varonce86==NULL)) {
+var87 = NEW_standard__NativeArray(4l, &type_standard__NativeArray__standard__String);
+if (likely(varonce88!=NULL)) {
+var89 = varonce88;
 } else {
-var104 = " = ";
-var105 = 3;
-var106 = standard___standard__NativeString___to_s_with_length(var104, var105);
-var103 = var106;
-varonce102 = var103;
+var90 = " = ";
+var91 = standard___standard__NativeString___to_s_with_length(var90, 3l);
+var89 = var91;
+varonce88 = var89;
 }
-if (varonce107) {
-var108 = varonce107;
+((struct instance_standard__NativeArray*)var87)->values[1]=var89;
+if (likely(varonce92!=NULL)) {
+var93 = varonce92;
 } else {
-var109 = ";";
-var110 = 1;
-var111 = standard___standard__NativeString___to_s_with_length(var109, var110);
-var108 = var111;
-varonce107 = var108;
+var94 = ";";
+var95 = standard___standard__NativeString___to_s_with_length(var94, 1l);
+var93 = var95;
+varonce92 = var93;
 }
-var112 = NEW_standard__Array(&type_standard__Array__standard__Object);
-{ /* var112 = array_instance Array[Object] */
-var113 = 4;
-var114 = NEW_standard__NativeArray(var113, &type_standard__NativeArray__standard__Object);
-((struct instance_standard__NativeArray*)var114)->values[0] = (val*) var_name;
-((struct instance_standard__NativeArray*)var114)->values[1] = (val*) var103;
-((struct instance_standard__NativeArray*)var114)->values[2] = (val*) var_res;
-((struct instance_standard__NativeArray*)var114)->values[3] = (val*) var108;
-{
-((void (*)(val* self, val* p0, long p1))(var112->class->vft[COLOR_standard__array__Array__with_native]))(var112, var114, var113) /* with_native on <var112:Array[Object]>*/;
+((struct instance_standard__NativeArray*)var87)->values[3]=var93;
+} else {
+var87 = varonce86;
+varonce86 = NULL;
 }
+((struct instance_standard__NativeArray*)var87)->values[0]=var_name;
+{
+var96 = ((val*(*)(val* self))(var_res->class->vft[COLOR_standard__string__Object__to_s]))(var_res); /* to_s on <var_res:RuntimeVariable>*/
 }
+((struct instance_standard__NativeArray*)var87)->values[2]=var96;
 {
-var115 = ((val* (*)(val* self))(var112->class->vft[COLOR_standard__string__Object__to_s]))(var112) /* to_s on <var112:Array[Object]>*/;
+var97 = ((val*(*)(val* self))(var87->class->vft[COLOR_standard__string__NativeArray__native_to_s]))(var87); /* native_to_s on <var87:NativeArray[String]>*/
 }
+varonce86 = var87;
 {
-nit___nit__AbstractCompilerVisitor___add(var_v, var115); /* Direct call abstract_compiler#AbstractCompilerVisitor#add on <var_v:AbstractCompilerVisitor>*/
+nit___nit__AbstractCompilerVisitor___add(var_v, var97); /* Direct call abstract_compiler#AbstractCompilerVisitor#add on <var_v:AbstractCompilerVisitor>*/
 }
-if (varonce116) {
-var117 = varonce116;
+if (unlikely(varonce98==NULL)) {
+var99 = NEW_standard__NativeArray(2l, &type_standard__NativeArray__standard__String);
+if (likely(varonce100!=NULL)) {
+var101 = varonce100;
 } else {
-var118 = " = 1;";
-var119 = 5;
-var120 = standard___standard__NativeString___to_s_with_length(var118, var119);
-var117 = var120;
-varonce116 = var117;
-}
-var121 = NEW_standard__Array(&type_standard__Array__standard__Object);
-{ /* var121 = array_instance Array[Object] */
-var122 = 2;
-var123 = NEW_standard__NativeArray(var122, &type_standard__NativeArray__standard__Object);
-((struct instance_standard__NativeArray*)var123)->values[0] = (val*) var_guard;
-((struct instance_standard__NativeArray*)var123)->values[1] = (val*) var117;
-{
-((void (*)(val* self, val* p0, long p1))(var121->class->vft[COLOR_standard__array__Array__with_native]))(var121, var123, var122) /* with_native on <var121:Array[Object]>*/;
+var102 = " = 1;";
+var103 = standard___standard__NativeString___to_s_with_length(var102, 5l);
+var101 = var103;
+varonce100 = var101;
 }
+((struct instance_standard__NativeArray*)var99)->values[1]=var101;
+} else {
+var99 = varonce98;
+varonce98 = NULL;
 }
+((struct instance_standard__NativeArray*)var99)->values[0]=var_guard;
 {
-var124 = ((val* (*)(val* self))(var121->class->vft[COLOR_standard__string__Object__to_s]))(var121) /* to_s on <var121:Array[Object]>*/;
+var104 = ((val*(*)(val* self))(var99->class->vft[COLOR_standard__string__NativeArray__native_to_s]))(var99); /* native_to_s on <var99:NativeArray[String]>*/
 }
+varonce98 = var99;
 {
-nit___nit__AbstractCompilerVisitor___add(var_v, var124); /* Direct call abstract_compiler#AbstractCompilerVisitor#add on <var_v:AbstractCompilerVisitor>*/
+nit___nit__AbstractCompilerVisitor___add(var_v, var104); /* Direct call abstract_compiler#AbstractCompilerVisitor#add on <var_v:AbstractCompilerVisitor>*/
 }
-if (varonce125) {
-var126 = varonce125;
+if (likely(varonce105!=NULL)) {
+var106 = varonce105;
 } else {
-var127 = "}";
-var128 = 1;
-var129 = standard___standard__NativeString___to_s_with_length(var127, var128);
-var126 = var129;
-varonce125 = var126;
+var107 = "}";
+var108 = standard___standard__NativeString___to_s_with_length(var107, 1l);
+var106 = var108;
+varonce105 = var106;
 }
 {
-nit___nit__AbstractCompilerVisitor___add(var_v, var126); /* Direct call abstract_compiler#AbstractCompilerVisitor#add on <var_v:AbstractCompilerVisitor>*/
+nit___nit__AbstractCompilerVisitor___add(var_v, var106); /* Direct call abstract_compiler#AbstractCompilerVisitor#add on <var_v:AbstractCompilerVisitor>*/
 }
 var = var_res;
 goto RET_LABEL;
@@ -4037,72 +4814,79 @@ val* var /* : nullable RuntimeVariable */;
 val* var_v /* var v: AbstractCompilerVisitor */;
 val* var1 /* : AExpr */;
 val* var3 /* : AExpr */;
-val* var4 /* : null */;
-val* var5 /* : RuntimeVariable */;
+val* var4 /* : RuntimeVariable */;
 val* var_recv /* var recv: RuntimeVariable */;
-val* var6 /* : nullable CallSite */;
-val* var8 /* : nullable CallSite */;
+val* var5 /* : nullable CallSite */;
+val* var7 /* : nullable CallSite */;
 val* var_callsite /* var callsite: CallSite */;
-val* var9 /* : MMethodDef */;
-val* var11 /* : MMethodDef */;
-val* var12 /* : Array[AExpr] */;
-val* var13 /* : Array[RuntimeVariable] */;
+val* var8 /* : MMethodDef */;
+val* var10 /* : MMethodDef */;
+val* var11 /* : nullable SignatureMap */;
+val* var13 /* : nullable SignatureMap */;
+val* var14 /* : Array[AExpr] */;
+val* var15 /* : Array[RuntimeVariable] */;
 val* var_args /* var args: Array[RuntimeVariable] */;
-val* var14 /* : nullable RuntimeVariable */;
+val* var16 /* : nullable RuntimeVariable */;
 var_v = p0;
 {
 { /* Inline parser_nodes#ASendExpr#n_expr (self) on <self:ASendExpr> */
 var3 = self->attrs[COLOR_nit__parser_nodes__ASendExpr___n_expr].val; /* _n_expr on <self:ASendExpr> */
 if (unlikely(var3 == NULL)) {
 PRINT_ERROR("Runtime error: %s", "Uninitialized attribute _n_expr");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__parser_nodes, 1802);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__parser_nodes, 2025);
+fatal_exit(1);
 }
 var1 = var3;
 RET_LABEL2:(void)0;
 }
 }
-var4 = NULL;
 {
-var5 = nit___nit__AbstractCompilerVisitor___expr(var_v, var1, var4);
+var4 = nit___nit__AbstractCompilerVisitor___expr(var_v, var1, ((val*)NULL));
 }
-var_recv = var5;
+var_recv = var4;
 {
 { /* Inline typing#ASendExpr#callsite (self) on <self:ASendExpr> */
-var8 = self->attrs[COLOR_nit__typing__ASendExpr___callsite].val; /* _callsite on <self:ASendExpr> */
-var6 = var8;
-RET_LABEL7:(void)0;
+var7 = self->attrs[COLOR_nit__typing__ASendExpr___callsite].val; /* _callsite on <self:ASendExpr> */
+var5 = var7;
+RET_LABEL6:(void)0;
 }
 }
-if (unlikely(var6 == NULL)) {
+if (unlikely(var5 == NULL)) {
 PRINT_ERROR("Runtime error: %s", "Cast failed");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 2842);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 3097);
+fatal_exit(1);
 }
-var_callsite = var6;
+var_callsite = var5;
 {
 { /* Inline typing#CallSite#mpropdef (var_callsite) on <var_callsite:CallSite> */
-var11 = var_callsite->attrs[COLOR_nit__typing__CallSite___mpropdef].val; /* _mpropdef on <var_callsite:CallSite> */
-if (unlikely(var11 == NULL)) {
+var10 = var_callsite->attrs[COLOR_nit__typing__CallSite___mpropdef].val; /* _mpropdef on <var_callsite:CallSite> */
+if (unlikely(var10 == NULL)) {
 PRINT_ERROR("Runtime error: %s", "Uninitialized attribute _mpropdef");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__typing, 490);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__typing, 627);
+fatal_exit(1);
 }
-var9 = var11;
-RET_LABEL10:(void)0;
+var8 = var10;
+RET_LABEL9:(void)0;
+}
+}
+{
+{ /* Inline typing#CallSite#signaturemap (var_callsite) on <var_callsite:CallSite> */
+var13 = var_callsite->attrs[COLOR_nit__typing__CallSite___signaturemap].val; /* _signaturemap on <var_callsite:CallSite> */
+var11 = var13;
+RET_LABEL12:(void)0;
 }
 }
 {
-var12 = nit__typing___ASendExpr___raw_arguments(self);
+var14 = nit__typing___ASendExpr___raw_arguments(self);
 }
 {
-var13 = nit___nit__AbstractCompilerVisitor___varargize(var_v, var9, var_recv, var12);
+var15 = nit___nit__AbstractCompilerVisitor___varargize(var_v, var8, var11, var_recv, var14);
 }
-var_args = var13;
+var_args = var15;
 {
-var14 = ((val* (*)(val* self, val* p0, val* p1))(var_v->class->vft[COLOR_nit__abstract_compiler__AbstractCompilerVisitor__compile_callsite]))(var_v, var_callsite, var_args) /* compile_callsite on <var_v:AbstractCompilerVisitor>*/;
+var16 = ((val*(*)(val* self, val* p0, val* p1))(var_v->class->vft[COLOR_nit__abstract_compiler__AbstractCompilerVisitor__compile_callsite]))(var_v, var_callsite, var_args); /* compile_callsite on <var_v:AbstractCompilerVisitor>*/
 }
-var = var14;
+var = var16;
 goto RET_LABEL;
 RET_LABEL:;
 return var;
@@ -4112,25 +4896,24 @@ void nit__abstract_compiler___ASendReassignFormExpr___AExpr__stmt(val* self, val
 val* var_v /* var v: AbstractCompilerVisitor */;
 val* var /* : AExpr */;
 val* var2 /* : AExpr */;
-val* var3 /* : null */;
-val* var4 /* : RuntimeVariable */;
+val* var3 /* : RuntimeVariable */;
 val* var_recv /* var recv: RuntimeVariable */;
-val* var5 /* : nullable CallSite */;
-val* var7 /* : nullable CallSite */;
+val* var4 /* : nullable CallSite */;
+val* var6 /* : nullable CallSite */;
 val* var_callsite /* var callsite: CallSite */;
-val* var8 /* : MMethodDef */;
-val* var10 /* : MMethodDef */;
-val* var11 /* : Array[AExpr] */;
-val* var12 /* : Array[RuntimeVariable] */;
+val* var7 /* : MMethodDef */;
+val* var9 /* : MMethodDef */;
+val* var10 /* : nullable SignatureMap */;
+val* var12 /* : nullable SignatureMap */;
+val* var13 /* : Array[AExpr] */;
+val* var14 /* : Array[RuntimeVariable] */;
 val* var_args /* var args: Array[RuntimeVariable] */;
-val* var13 /* : AExpr */;
 val* var15 /* : AExpr */;
-val* var16 /* : null */;
-val* var17 /* : RuntimeVariable */;
+val* var17 /* : AExpr */;
+val* var18 /* : RuntimeVariable */;
 val* var_value /* var value: RuntimeVariable */;
-val* var18 /* : nullable RuntimeVariable */;
+val* var19 /* : nullable RuntimeVariable */;
 val* var_left /* var left: nullable RuntimeVariable */;
-val* var19 /* : null */;
 short int var20 /* : Bool */;
 short int var21 /* : Bool */;
 val* var_other /* var other: nullable Object */;
@@ -4139,100 +4922,102 @@ short int var24 /* : Bool */;
 val* var25 /* : nullable CallSite */;
 val* var27 /* : nullable CallSite */;
 val* var28 /* : Array[RuntimeVariable] */;
-long var29 /* : Int */;
 val* var_ /* var : Array[RuntimeVariable] */;
-val* var30 /* : nullable RuntimeVariable */;
+val* var29 /* : nullable RuntimeVariable */;
 val* var_res /* var res: nullable RuntimeVariable */;
-val* var31 /* : null */;
-short int var32 /* : Bool */;
+short int var30 /* : Bool */;
+short int var31 /* : Bool */;
 short int var33 /* : Bool */;
-short int var35 /* : Bool */;
-short int var36 /* : Bool */;
+short int var34 /* : Bool */;
+val* var35 /* : nullable CallSite */;
 val* var37 /* : nullable CallSite */;
-val* var39 /* : nullable CallSite */;
-val* var40 /* : nullable RuntimeVariable */;
+val* var38 /* : nullable RuntimeVariable */;
 var_v = p0;
 {
 { /* Inline parser_nodes#ASendExpr#n_expr (self) on <self:ASendReassignFormExpr> */
 var2 = self->attrs[COLOR_nit__parser_nodes__ASendExpr___n_expr].val; /* _n_expr on <self:ASendReassignFormExpr> */
 if (unlikely(var2 == NULL)) {
 PRINT_ERROR("Runtime error: %s", "Uninitialized attribute _n_expr");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__parser_nodes, 1802);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__parser_nodes, 2025);
+fatal_exit(1);
 }
 var = var2;
 RET_LABEL1:(void)0;
 }
 }
-var3 = NULL;
 {
-var4 = nit___nit__AbstractCompilerVisitor___expr(var_v, var, var3);
+var3 = nit___nit__AbstractCompilerVisitor___expr(var_v, var, ((val*)NULL));
 }
-var_recv = var4;
+var_recv = var3;
 {
 { /* Inline typing#ASendExpr#callsite (self) on <self:ASendReassignFormExpr> */
-var7 = self->attrs[COLOR_nit__typing__ASendExpr___callsite].val; /* _callsite on <self:ASendReassignFormExpr> */
-var5 = var7;
-RET_LABEL6:(void)0;
+var6 = self->attrs[COLOR_nit__typing__ASendExpr___callsite].val; /* _callsite on <self:ASendReassignFormExpr> */
+var4 = var6;
+RET_LABEL5:(void)0;
 }
 }
-if (unlikely(var5 == NULL)) {
+if (unlikely(var4 == NULL)) {
 PRINT_ERROR("Runtime error: %s", "Cast failed");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 2852);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 3107);
+fatal_exit(1);
 }
-var_callsite = var5;
+var_callsite = var4;
 {
 { /* Inline typing#CallSite#mpropdef (var_callsite) on <var_callsite:CallSite> */
-var10 = var_callsite->attrs[COLOR_nit__typing__CallSite___mpropdef].val; /* _mpropdef on <var_callsite:CallSite> */
-if (unlikely(var10 == NULL)) {
+var9 = var_callsite->attrs[COLOR_nit__typing__CallSite___mpropdef].val; /* _mpropdef on <var_callsite:CallSite> */
+if (unlikely(var9 == NULL)) {
 PRINT_ERROR("Runtime error: %s", "Uninitialized attribute _mpropdef");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__typing, 490);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__typing, 627);
+fatal_exit(1);
 }
-var8 = var10;
-RET_LABEL9:(void)0;
+var7 = var9;
+RET_LABEL8:(void)0;
+}
+}
+{
+{ /* Inline typing#CallSite#signaturemap (var_callsite) on <var_callsite:CallSite> */
+var12 = var_callsite->attrs[COLOR_nit__typing__CallSite___signaturemap].val; /* _signaturemap on <var_callsite:CallSite> */
+var10 = var12;
+RET_LABEL11:(void)0;
 }
 }
 {
-var11 = nit__typing___ASendExpr___raw_arguments(self);
+var13 = nit__typing___ASendExpr___raw_arguments(self);
 }
 {
-var12 = nit___nit__AbstractCompilerVisitor___varargize(var_v, var8, var_recv, var11);
+var14 = nit___nit__AbstractCompilerVisitor___varargize(var_v, var7, var10, var_recv, var13);
 }
-var_args = var12;
+var_args = var14;
 {
 { /* Inline parser_nodes#AReassignFormExpr#n_value (self) on <self:ASendReassignFormExpr> */
-var15 = self->attrs[COLOR_nit__parser_nodes__AReassignFormExpr___n_value].val; /* _n_value on <self:ASendReassignFormExpr> */
-if (unlikely(var15 == NULL)) {
+var17 = self->attrs[COLOR_nit__parser_nodes__AReassignFormExpr___n_value].val; /* _n_value on <self:ASendReassignFormExpr> */
+if (unlikely(var17 == NULL)) {
 PRINT_ERROR("Runtime error: %s", "Uninitialized attribute _n_value");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__parser_nodes, 1783);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__parser_nodes, 2006);
+fatal_exit(1);
 }
-var13 = var15;
-RET_LABEL14:(void)0;
+var15 = var17;
+RET_LABEL16:(void)0;
 }
 }
-var16 = NULL;
 {
-var17 = nit___nit__AbstractCompilerVisitor___expr(var_v, var13, var16);
+var18 = nit___nit__AbstractCompilerVisitor___expr(var_v, var15, ((val*)NULL));
 }
-var_value = var17;
+var_value = var18;
 {
-var18 = ((val* (*)(val* self, val* p0, val* p1))(var_v->class->vft[COLOR_nit__abstract_compiler__AbstractCompilerVisitor__compile_callsite]))(var_v, var_callsite, var_args) /* compile_callsite on <var_v:AbstractCompilerVisitor>*/;
+var19 = ((val*(*)(val* self, val* p0, val* p1))(var_v->class->vft[COLOR_nit__abstract_compiler__AbstractCompilerVisitor__compile_callsite]))(var_v, var_callsite, var_args); /* compile_callsite on <var_v:AbstractCompilerVisitor>*/
 }
-var_left = var18;
-var19 = NULL;
+var_left = var19;
 if (var_left == NULL) {
 var20 = 0; /* is null */
 } else {
 var20 = 1; /* arg is null and recv is not */
 }
 if (0) {
-{ /* Inline kernel#Object#!= (var_left,var19) on <var_left:nullable RuntimeVariable> */
-var_other = var19;
+{ /* Inline kernel#Object#!= (var_left,((val*)NULL)) on <var_left:nullable RuntimeVariable> */
+var_other = ((val*)NULL);
 {
-var23 = ((short int (*)(val* self, val* p0))(var_left->class->vft[COLOR_standard__kernel__Object___61d_61d]))(var_left, var_other) /* == on <var_left:nullable RuntimeVariable(RuntimeVariable)>*/;
+var23 = ((short int(*)(val* self, val* p0))(var_left->class->vft[COLOR_standard__kernel__Object___61d_61d]))(var_left, var_other); /* == on <var_left:nullable RuntimeVariable(RuntimeVariable)>*/
 }
 var24 = !var23;
 var21 = var24;
@@ -4243,8 +5028,8 @@ var20 = var21;
 }
 if (unlikely(!var20)) {
 PRINT_ERROR("Runtime error: %s", "Assert failed");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 2858);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 3113);
+fatal_exit(1);
 }
 {
 { /* Inline typing#AReassignFormExpr#reassign_callsite (self) on <self:ASendReassignFormExpr> */
@@ -4255,13 +5040,12 @@ RET_LABEL26:(void)0;
 }
 if (unlikely(var25 == NULL)) {
 PRINT_ERROR("Runtime error: %s", "Cast failed");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 2860);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 3115);
+fatal_exit(1);
 }
 var28 = NEW_standard__Array(&type_standard__Array__nit__RuntimeVariable);
-var29 = 2;
 {
-standard___standard__Array___with_capacity(var28, var29); /* Direct call array#Array#with_capacity on <var28:Array[RuntimeVariable]>*/
+standard___standard__Array___with_capacity(var28, 2l); /* Direct call array#Array#with_capacity on <var28:Array[RuntimeVariable]>*/
 }
 var_ = var28;
 {
@@ -4271,50 +5055,49 @@ standard___standard__AbstractArray___standard__abstract_collection__Sequence__pu
 standard___standard__AbstractArray___standard__abstract_collection__Sequence__push(var_, var_value); /* Direct call array#AbstractArray#push on <var_:Array[RuntimeVariable]>*/
 }
 {
-var30 = ((val* (*)(val* self, val* p0, val* p1))(var_v->class->vft[COLOR_nit__abstract_compiler__AbstractCompilerVisitor__compile_callsite]))(var_v, var25, var_) /* compile_callsite on <var_v:AbstractCompilerVisitor>*/;
+var29 = ((val*(*)(val* self, val* p0, val* p1))(var_v->class->vft[COLOR_nit__abstract_compiler__AbstractCompilerVisitor__compile_callsite]))(var_v, var25, var_); /* compile_callsite on <var_v:AbstractCompilerVisitor>*/
 }
-var_res = var30;
-var31 = NULL;
+var_res = var29;
 if (var_res == NULL) {
-var32 = 0; /* is null */
+var30 = 0; /* is null */
 } else {
-var32 = 1; /* arg is null and recv is not */
+var30 = 1; /* arg is null and recv is not */
 }
 if (0) {
-{ /* Inline kernel#Object#!= (var_res,var31) on <var_res:nullable RuntimeVariable> */
-var_other = var31;
+{ /* Inline kernel#Object#!= (var_res,((val*)NULL)) on <var_res:nullable RuntimeVariable> */
+var_other = ((val*)NULL);
 {
-var35 = ((short int (*)(val* self, val* p0))(var_res->class->vft[COLOR_standard__kernel__Object___61d_61d]))(var_res, var_other) /* == on <var_res:nullable RuntimeVariable(RuntimeVariable)>*/;
+var33 = ((short int(*)(val* self, val* p0))(var_res->class->vft[COLOR_standard__kernel__Object___61d_61d]))(var_res, var_other); /* == on <var_res:nullable RuntimeVariable(RuntimeVariable)>*/
 }
-var36 = !var35;
-var33 = var36;
-goto RET_LABEL34;
-RET_LABEL34:(void)0;
+var34 = !var33;
+var31 = var34;
+goto RET_LABEL32;
+RET_LABEL32:(void)0;
 }
-var32 = var33;
+var30 = var31;
 }
-if (unlikely(!var32)) {
+if (unlikely(!var30)) {
 PRINT_ERROR("Runtime error: %s", "Assert failed");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 2861);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 3116);
+fatal_exit(1);
 }
 {
 standard___standard__Array___standard__abstract_collection__SimpleCollection__add(var_args, var_res); /* Direct call array#Array#add on <var_args:Array[RuntimeVariable]>*/
 }
 {
 { /* Inline typing#ASendReassignFormExpr#write_callsite (self) on <self:ASendReassignFormExpr> */
-var39 = self->attrs[COLOR_nit__typing__ASendReassignFormExpr___write_callsite].val; /* _write_callsite on <self:ASendReassignFormExpr> */
-var37 = var39;
-RET_LABEL38:(void)0;
+var37 = self->attrs[COLOR_nit__typing__ASendReassignFormExpr___write_callsite].val; /* _write_callsite on <self:ASendReassignFormExpr> */
+var35 = var37;
+RET_LABEL36:(void)0;
 }
 }
-if (unlikely(var37 == NULL)) {
+if (unlikely(var35 == NULL)) {
 PRINT_ERROR("Runtime error: %s", "Cast failed");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 2864);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 3119);
+fatal_exit(1);
 }
 {
-var40 = ((val* (*)(val* self, val* p0, val* p1))(var_v->class->vft[COLOR_nit__abstract_compiler__AbstractCompilerVisitor__compile_callsite]))(var_v, var37, var_args) /* compile_callsite on <var_v:AbstractCompilerVisitor>*/;
+var38 = ((val*(*)(val* self, val* p0, val* p1))(var_v->class->vft[COLOR_nit__abstract_compiler__AbstractCompilerVisitor__compile_callsite]))(var_v, var35, var_args); /* compile_callsite on <var_v:AbstractCompilerVisitor>*/
 }
 RET_LABEL:;
 }
@@ -4331,78 +5114,80 @@ val* var_recv /* var recv: RuntimeVariable */;
 val* var8 /* : nullable CallSite */;
 val* var10 /* : nullable CallSite */;
 val* var_callsite /* var callsite: nullable CallSite */;
-val* var11 /* : null */;
+short int var11 /* : Bool */;
 short int var12 /* : Bool */;
-short int var13 /* : Bool */;
 val* var_other /* var other: nullable Object */;
+short int var14 /* : Bool */;
 short int var15 /* : Bool */;
-short int var16 /* : Bool */;
-val* var17 /* : MMethodDef */;
-val* var19 /* : MMethodDef */;
-val* var20 /* : AExprs */;
-val* var22 /* : AExprs */;
-val* var23 /* : ANodes[AExpr] */;
-val* var25 /* : ANodes[AExpr] */;
-val* var26 /* : Array[RuntimeVariable] */;
-val* var_args /* var args: Array[RuntimeVariable] */;
+val* var16 /* : AExprs */;
+val* var18 /* : AExprs */;
+val* var19 /* : ANodes[AExpr] */;
+val* var21 /* : ANodes[AExpr] */;
+short int var22 /* : Bool */;
+val* var23 /* : Array[RuntimeVariable] */;
+val* var_ /* var : Array[RuntimeVariable] */;
+val* var_args /* var args: nullable Object */;
+long var_i /* var i: Int */;
+val* var24 /* : MSignature */;
+val* var26 /* : MSignature */;
 long var27 /* : Int */;
-long var29 /* : Int */;
-long var30 /* : Int */;
+long var_28 /* var : Int */;
+short int var29 /* : Bool */;
 short int var31 /* : Bool */;
-short int var33 /* : Bool */;
-long var34 /* : Int */;
-long var_i /* var i: Int */;
-val* var35 /* : MSignature */;
-val* var37 /* : MSignature */;
-long var38 /* : Int */;
-long var_ /* var : Int */;
-short int var39 /* : Bool */;
-short int var41 /* : Bool */;
 int cltype;
 int idtype;
 const char* var_class_name;
-short int var42 /* : Bool */;
-val* var43 /* : nullable StaticFrame */;
-val* var45 /* : nullable StaticFrame */;
-val* var46 /* : Array[RuntimeVariable] */;
-val* var48 /* : Array[RuntimeVariable] */;
-long var49 /* : Int */;
-long var50 /* : Int */;
-short int var52 /* : Bool */;
-int cltype53;
-int idtype54;
-const char* var_class_name55;
-long var56 /* : Int */;
-val* var57 /* : nullable Object */;
-long var58 /* : Int */;
-long var59 /* : Int */;
-val* var60 /* : nullable RuntimeVariable */;
+short int var32 /* : Bool */;
+val* var33 /* : nullable StaticFrame */;
+val* var35 /* : nullable StaticFrame */;
+val* var36 /* : Array[RuntimeVariable] */;
+val* var38 /* : Array[RuntimeVariable] */;
+long var39 /* : Int */;
+short int var41 /* : Bool */;
+int cltype42;
+int idtype43;
+const char* var_class_name44;
+long var45 /* : Int */;
+val* var46 /* : nullable Object */;
+long var47 /* : Int */;
+val* var48 /* : MMethodDef */;
+val* var50 /* : MMethodDef */;
+val* var51 /* : nullable SignatureMap */;
+val* var53 /* : nullable SignatureMap */;
+val* var54 /* : AExprs */;
+val* var56 /* : AExprs */;
+val* var57 /* : ANodes[AExpr] */;
+val* var59 /* : ANodes[AExpr] */;
+val* var60 /* : Array[RuntimeVariable] */;
+val* var61 /* : nullable RuntimeVariable */;
 val* var_res /* var res: nullable RuntimeVariable */;
-val* var61 /* : nullable MMethodDef */;
-val* var63 /* : nullable MMethodDef */;
+val* var62 /* : nullable MMethodDef */;
+val* var64 /* : nullable MMethodDef */;
 val* var_mpropdef /* var mpropdef: MMethodDef */;
-val* var64 /* : AExprs */;
-val* var66 /* : AExprs */;
-val* var67 /* : ANodes[AExpr] */;
-val* var69 /* : ANodes[AExpr] */;
-val* var70 /* : Array[RuntimeVariable] */;
-val* var_args71 /* var args: Array[RuntimeVariable] */;
-long var72 /* : Int */;
-long var74 /* : Int */;
-long var75 /* : Int */;
-short int var76 /* : Bool */;
-short int var78 /* : Bool */;
-val* var79 /* : nullable StaticFrame */;
-val* var81 /* : nullable StaticFrame */;
-val* var82 /* : Array[RuntimeVariable] */;
-val* var84 /* : Array[RuntimeVariable] */;
-val* var85 /* : MType */;
-val* var87 /* : MType */;
-short int var88 /* : Bool */;
-int cltype89;
-int idtype90;
-const char* var_class_name91;
-val* var92 /* : nullable RuntimeVariable */;
+val* var65 /* : AExprs */;
+val* var67 /* : AExprs */;
+val* var68 /* : ANodes[AExpr] */;
+val* var70 /* : ANodes[AExpr] */;
+short int var71 /* : Bool */;
+val* var72 /* : nullable StaticFrame */;
+val* var74 /* : nullable StaticFrame */;
+val* var75 /* : Array[RuntimeVariable] */;
+val* var77 /* : Array[RuntimeVariable] */;
+val* var_args78 /* var args: nullable Object */;
+val* var79 /* : nullable SignatureMap */;
+val* var81 /* : nullable SignatureMap */;
+val* var82 /* : AExprs */;
+val* var84 /* : AExprs */;
+val* var85 /* : ANodes[AExpr] */;
+val* var87 /* : ANodes[AExpr] */;
+val* var88 /* : Array[RuntimeVariable] */;
+val* var89 /* : MType */;
+val* var91 /* : MType */;
+short int var92 /* : Bool */;
+int cltype93;
+int idtype94;
+const char* var_class_name95;
+val* var96 /* : nullable RuntimeVariable */;
 var_v = p0;
 {
 { /* Inline abstract_compiler#AbstractCompilerVisitor#frame (var_v) on <var_v:AbstractCompilerVisitor> */
@@ -4413,20 +5198,20 @@ RET_LABEL2:(void)0;
 }
 if (var1 == NULL) {
 PRINT_ERROR("Runtime error: %s", "Receiver is null");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 2871);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 3126);
+fatal_exit(1);
 } else {
 { /* Inline abstract_compiler#StaticFrame#arguments (var1) on <var1:nullable StaticFrame> */
 if (unlikely(var1 == NULL)) {
 PRINT_ERROR("Runtime error: %s", "Receiver is null");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 1731);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 1835);
+fatal_exit(1);
 }
 var6 = var1->attrs[COLOR_nit__abstract_compiler__StaticFrame___arguments].val; /* _arguments on <var1:nullable StaticFrame> */
 if (unlikely(var6 == NULL)) {
 PRINT_ERROR("Runtime error: %s", "Uninitialized attribute _arguments");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 1731);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 1835);
+fatal_exit(1);
 }
 var4 = var6;
 RET_LABEL5:(void)0;
@@ -4444,311 +5229,352 @@ RET_LABEL9:(void)0;
 }
 }
 var_callsite = var8;
-var11 = NULL;
 if (var_callsite == NULL) {
-var12 = 0; /* is null */
+var11 = 0; /* is null */
 } else {
-var12 = 1; /* arg is null and recv is not */
+var11 = 1; /* arg is null and recv is not */
 }
 if (0) {
-{ /* Inline kernel#Object#!= (var_callsite,var11) on <var_callsite:nullable CallSite> */
-var_other = var11;
-{
-var15 = ((short int (*)(val* self, val* p0))(var_callsite->class->vft[COLOR_standard__kernel__Object___61d_61d]))(var_callsite, var_other) /* == on <var_callsite:nullable CallSite(CallSite)>*/;
-}
-var16 = !var15;
-var13 = var16;
-goto RET_LABEL14;
-RET_LABEL14:(void)0;
-}
-var12 = var13;
-}
-if (var12){
+{ /* Inline kernel#Object#!= (var_callsite,((val*)NULL)) on <var_callsite:nullable CallSite> */
+var_other = ((val*)NULL);
 {
-{ /* Inline typing#CallSite#mpropdef (var_callsite) on <var_callsite:nullable CallSite(CallSite)> */
-var19 = var_callsite->attrs[COLOR_nit__typing__CallSite___mpropdef].val; /* _mpropdef on <var_callsite:nullable CallSite(CallSite)> */
-if (unlikely(var19 == NULL)) {
-PRINT_ERROR("Runtime error: %s", "Uninitialized attribute _mpropdef");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__typing, 490);
-show_backtrace(1);
-}
-var17 = var19;
-RET_LABEL18:(void)0;
+var14 = ((short int(*)(val* self, val* p0))(var_callsite->class->vft[COLOR_standard__kernel__Object___61d_61d]))(var_callsite, var_other); /* == on <var_callsite:nullable CallSite(CallSite)>*/
 }
+var15 = !var14;
+var12 = var15;
+goto RET_LABEL13;
+RET_LABEL13:(void)0;
 }
+var11 = var12;
+}
+if (var11){
 {
 { /* Inline parser_nodes#ASuperExpr#n_args (self) on <self:ASuperExpr> */
-var22 = self->attrs[COLOR_nit__parser_nodes__ASuperExpr___n_args].val; /* _n_args on <self:ASuperExpr> */
-if (unlikely(var22 == NULL)) {
+var18 = self->attrs[COLOR_nit__parser_nodes__ASuperExpr___n_args].val; /* _n_args on <self:ASuperExpr> */
+if (unlikely(var18 == NULL)) {
 PRINT_ERROR("Runtime error: %s", "Uninitialized attribute _n_args");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__parser_nodes, 2051);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__parser_nodes, 2344);
+fatal_exit(1);
 }
-var20 = var22;
-RET_LABEL21:(void)0;
+var16 = var18;
+RET_LABEL17:(void)0;
 }
 }
 {
-{ /* Inline parser_nodes#AExprs#n_exprs (var20) on <var20:AExprs> */
-var25 = var20->attrs[COLOR_nit__parser_nodes__AExprs___n_exprs].val; /* _n_exprs on <var20:AExprs> */
-if (unlikely(var25 == NULL)) {
+{ /* Inline parser_nodes#AExprs#n_exprs (var16) on <var16:AExprs> */
+var21 = var16->attrs[COLOR_nit__parser_nodes__AExprs___n_exprs].val; /* _n_exprs on <var16:AExprs> */
+if (unlikely(var21 == NULL)) {
 PRINT_ERROR("Runtime error: %s", "Uninitialized attribute _n_exprs");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__parser_nodes, 2408);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__parser_nodes, 2771);
+fatal_exit(1);
 }
-var23 = var25;
-RET_LABEL24:(void)0;
+var19 = var21;
+RET_LABEL20:(void)0;
 }
 }
 {
-var26 = nit___nit__AbstractCompilerVisitor___varargize(var_v, var17, var_recv, var23);
+var22 = nit___nit__ANodes___standard__abstract_collection__Collection__is_empty(var19);
 }
-var_args = var26;
+if (var22){
+var23 = NEW_standard__Array(&type_standard__Array__nit__RuntimeVariable);
 {
-{ /* Inline array#AbstractArrayRead#length (var_args) on <var_args:Array[RuntimeVariable]> */
-var29 = var_args->attrs[COLOR_standard__array__AbstractArrayRead___length].l; /* _length on <var_args:Array[RuntimeVariable]> */
-var27 = var29;
-RET_LABEL28:(void)0;
+standard___standard__Array___with_capacity(var23, 1l); /* Direct call array#Array#with_capacity on <var23:Array[RuntimeVariable]>*/
 }
-}
-var30 = 1;
+var_ = var23;
 {
-{ /* Inline kernel#Int#== (var27,var30) on <var27:Int> */
-var33 = var27 == var30;
-var31 = var33;
-goto RET_LABEL32;
-RET_LABEL32:(void)0;
+standard___standard__AbstractArray___standard__abstract_collection__Sequence__push(var_, var_recv); /* Direct call array#AbstractArray#push on <var_:Array[RuntimeVariable]>*/
 }
-}
-if (var31){
-var34 = 0;
-var_i = var34;
+var_args = var_;
+var_i = 0l;
 {
 { /* Inline typing#CallSite#msignature (var_callsite) on <var_callsite:nullable CallSite(CallSite)> */
-var37 = var_callsite->attrs[COLOR_nit__typing__CallSite___msignature].val; /* _msignature on <var_callsite:nullable CallSite(CallSite)> */
-if (unlikely(var37 == NULL)) {
+var26 = var_callsite->attrs[COLOR_nit__typing__CallSite___msignature].val; /* _msignature on <var_callsite:nullable CallSite(CallSite)> */
+if (unlikely(var26 == NULL)) {
 PRINT_ERROR("Runtime error: %s", "Uninitialized attribute _msignature");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__typing, 494);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__typing, 631);
+fatal_exit(1);
 }
-var35 = var37;
-RET_LABEL36:(void)0;
+var24 = var26;
+RET_LABEL25:(void)0;
 }
 }
 {
-var38 = nit___nit__MSignature___arity(var35);
+var27 = nit___nit__MSignature___arity(var24);
 }
-var_ = var38;
+var_28 = var27;
 for(;;) {
 {
-{ /* Inline kernel#Int#< (var_i,var_) on <var_i:Int> */
-/* Covariant cast for argument 0 (i) <var_:Int> isa OTHER */
-/* <var_:Int> isa OTHER */
-var41 = 1; /* easy <var_:Int> isa OTHER*/
-if (unlikely(!var41)) {
+{ /* Inline kernel#Int#< (var_i,var_28) on <var_i:Int> */
+/* Covariant cast for argument 0 (i) <var_28:Int> isa OTHER */
+/* <var_28:Int> isa OTHER */
+var31 = 1; /* easy <var_28:Int> isa OTHER*/
+if (unlikely(!var31)) {
 var_class_name = type_standard__Int.name;
 PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name);
-PRINT_ERROR(" (%s:%d)\n", FILE_standard__kernel, 410);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_standard__kernel, 534);
+fatal_exit(1);
 }
-var42 = var_i < var_;
-var39 = var42;
-goto RET_LABEL40;
-RET_LABEL40:(void)0;
+var32 = var_i < var_28;
+var29 = var32;
+goto RET_LABEL30;
+RET_LABEL30:(void)0;
 }
 }
-if (var39){
+if (var29){
 {
 { /* Inline abstract_compiler#AbstractCompilerVisitor#frame (var_v) on <var_v:AbstractCompilerVisitor> */
-var45 = var_v->attrs[COLOR_nit__abstract_compiler__AbstractCompilerVisitor___frame].val; /* _frame on <var_v:AbstractCompilerVisitor> */
-var43 = var45;
-RET_LABEL44:(void)0;
+var35 = var_v->attrs[COLOR_nit__abstract_compiler__AbstractCompilerVisitor___frame].val; /* _frame on <var_v:AbstractCompilerVisitor> */
+var33 = var35;
+RET_LABEL34:(void)0;
 }
 }
-if (var43 == NULL) {
+if (var33 == NULL) {
 PRINT_ERROR("Runtime error: %s", "Receiver is null");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 2880);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 3136);
+fatal_exit(1);
 } else {
-{ /* Inline abstract_compiler#StaticFrame#arguments (var43) on <var43:nullable StaticFrame> */
-if (unlikely(var43 == NULL)) {
+{ /* Inline abstract_compiler#StaticFrame#arguments (var33) on <var33:nullable StaticFrame> */
+if (unlikely(var33 == NULL)) {
 PRINT_ERROR("Runtime error: %s", "Receiver is null");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 1731);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 1835);
+fatal_exit(1);
 }
-var48 = var43->attrs[COLOR_nit__abstract_compiler__StaticFrame___arguments].val; /* _arguments on <var43:nullable StaticFrame> */
-if (unlikely(var48 == NULL)) {
+var38 = var33->attrs[COLOR_nit__abstract_compiler__StaticFrame___arguments].val; /* _arguments on <var33:nullable StaticFrame> */
+if (unlikely(var38 == NULL)) {
 PRINT_ERROR("Runtime error: %s", "Uninitialized attribute _arguments");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 1731);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 1835);
+fatal_exit(1);
 }
-var46 = var48;
-RET_LABEL47:(void)0;
+var36 = var38;
+RET_LABEL37:(void)0;
 }
 }
-var49 = 1;
 {
-{ /* Inline kernel#Int#+ (var_i,var49) on <var_i:Int> */
-/* Covariant cast for argument 0 (i) <var49:Int> isa OTHER */
-/* <var49:Int> isa OTHER */
-var52 = 1; /* easy <var49:Int> isa OTHER*/
-if (unlikely(!var52)) {
-var_class_name55 = type_standard__Int.name;
-PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name55);
-PRINT_ERROR(" (%s:%d)\n", FILE_standard__kernel, 413);
-show_backtrace(1);
+{ /* Inline kernel#Int#+ (var_i,1l) on <var_i:Int> */
+/* Covariant cast for argument 0 (i) <1l:Int> isa OTHER */
+/* <1l:Int> isa OTHER */
+var41 = 1; /* easy <1l:Int> isa OTHER*/
+if (unlikely(!var41)) {
+var_class_name44 = type_standard__Int.name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name44);
+PRINT_ERROR(" (%s:%d)\n", FILE_standard__kernel, 537);
+fatal_exit(1);
 }
-var56 = var_i + var49;
-var50 = var56;
-goto RET_LABEL51;
-RET_LABEL51:(void)0;
+var45 = var_i + 1l;
+var39 = var45;
+goto RET_LABEL40;
+RET_LABEL40:(void)0;
 }
 }
 {
-var57 = standard___standard__Array___standard__abstract_collection__SequenceRead___91d_93d(var46, var50);
+var46 = standard___standard__Array___standard__abstract_collection__SequenceRead___91d_93d(var36, var39);
 }
 {
-standard___standard__Array___standard__abstract_collection__SimpleCollection__add(var_args, var57); /* Direct call array#Array#add on <var_args:Array[RuntimeVariable]>*/
+standard___standard__Array___standard__abstract_collection__SimpleCollection__add(var_args, var46); /* Direct call array#Array#add on <var_args:nullable Object(Array[RuntimeVariable])>*/
 }
-var58 = 1;
 {
-var59 = standard___standard__Int___Discrete__successor(var_i, var58);
+var47 = standard___standard__Int___Discrete__successor(var_i, 1l);
 }
-var_i = var59;
+var_i = var47;
 } else {
 goto BREAK_label;
 }
 }
 BREAK_label: (void)0;
 } else {
+{
+{ /* Inline typing#CallSite#mpropdef (var_callsite) on <var_callsite:nullable CallSite(CallSite)> */
+var50 = var_callsite->attrs[COLOR_nit__typing__CallSite___mpropdef].val; /* _mpropdef on <var_callsite:nullable CallSite(CallSite)> */
+if (unlikely(var50 == NULL)) {
+PRINT_ERROR("Runtime error: %s", "Uninitialized attribute _mpropdef");
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__typing, 627);
+fatal_exit(1);
+}
+var48 = var50;
+RET_LABEL49:(void)0;
+}
+}
+{
+{ /* Inline typing#CallSite#signaturemap (var_callsite) on <var_callsite:nullable CallSite(CallSite)> */
+var53 = var_callsite->attrs[COLOR_nit__typing__CallSite___signaturemap].val; /* _signaturemap on <var_callsite:nullable CallSite(CallSite)> */
+var51 = var53;
+RET_LABEL52:(void)0;
+}
+}
+{
+{ /* Inline parser_nodes#ASuperExpr#n_args (self) on <self:ASuperExpr> */
+var56 = self->attrs[COLOR_nit__parser_nodes__ASuperExpr___n_args].val; /* _n_args on <self:ASuperExpr> */
+if (unlikely(var56 == NULL)) {
+PRINT_ERROR("Runtime error: %s", "Uninitialized attribute _n_args");
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__parser_nodes, 2344);
+fatal_exit(1);
+}
+var54 = var56;
+RET_LABEL55:(void)0;
+}
+}
+{
+{ /* Inline parser_nodes#AExprs#n_exprs (var54) on <var54:AExprs> */
+var59 = var54->attrs[COLOR_nit__parser_nodes__AExprs___n_exprs].val; /* _n_exprs on <var54:AExprs> */
+if (unlikely(var59 == NULL)) {
+PRINT_ERROR("Runtime error: %s", "Uninitialized attribute _n_exprs");
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__parser_nodes, 2771);
+fatal_exit(1);
+}
+var57 = var59;
+RET_LABEL58:(void)0;
+}
+}
+{
+var60 = nit___nit__AbstractCompilerVisitor___varargize(var_v, var48, var51, var_recv, var57);
+}
+var_args = var60;
 }
 {
-var60 = ((val* (*)(val* self, val* p0, val* p1))(var_v->class->vft[COLOR_nit__abstract_compiler__AbstractCompilerVisitor__compile_callsite]))(var_v, var_callsite, var_args) /* compile_callsite on <var_v:AbstractCompilerVisitor>*/;
+var61 = ((val*(*)(val* self, val* p0, val* p1))(var_v->class->vft[COLOR_nit__abstract_compiler__AbstractCompilerVisitor__compile_callsite]))(var_v, var_callsite, var_args); /* compile_callsite on <var_v:AbstractCompilerVisitor>*/
 }
-var_res = var60;
+var_res = var61;
 var = var_res;
 goto RET_LABEL;
 } else {
 }
 {
 { /* Inline typing#ASuperExpr#mpropdef (self) on <self:ASuperExpr> */
-var63 = self->attrs[COLOR_nit__typing__ASuperExpr___mpropdef].val; /* _mpropdef on <self:ASuperExpr> */
-var61 = var63;
-RET_LABEL62:(void)0;
+var64 = self->attrs[COLOR_nit__typing__ASuperExpr___mpropdef].val; /* _mpropdef on <self:ASuperExpr> */
+var62 = var64;
+RET_LABEL63:(void)0;
 }
 }
-if (unlikely(var61 == NULL)) {
+if (unlikely(var62 == NULL)) {
 PRINT_ERROR("Runtime error: %s", "Cast failed");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 2888);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 3147);
+fatal_exit(1);
 }
-var_mpropdef = var61;
+var_mpropdef = var62;
 {
 { /* Inline parser_nodes#ASuperExpr#n_args (self) on <self:ASuperExpr> */
-var66 = self->attrs[COLOR_nit__parser_nodes__ASuperExpr___n_args].val; /* _n_args on <self:ASuperExpr> */
-if (unlikely(var66 == NULL)) {
+var67 = self->attrs[COLOR_nit__parser_nodes__ASuperExpr___n_args].val; /* _n_args on <self:ASuperExpr> */
+if (unlikely(var67 == NULL)) {
 PRINT_ERROR("Runtime error: %s", "Uninitialized attribute _n_args");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__parser_nodes, 2051);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__parser_nodes, 2344);
+fatal_exit(1);
 }
-var64 = var66;
-RET_LABEL65:(void)0;
+var65 = var67;
+RET_LABEL66:(void)0;
 }
 }
 {
-{ /* Inline parser_nodes#AExprs#n_exprs (var64) on <var64:AExprs> */
-var69 = var64->attrs[COLOR_nit__parser_nodes__AExprs___n_exprs].val; /* _n_exprs on <var64:AExprs> */
-if (unlikely(var69 == NULL)) {
+{ /* Inline parser_nodes#AExprs#n_exprs (var65) on <var65:AExprs> */
+var70 = var65->attrs[COLOR_nit__parser_nodes__AExprs___n_exprs].val; /* _n_exprs on <var65:AExprs> */
+if (unlikely(var70 == NULL)) {
 PRINT_ERROR("Runtime error: %s", "Uninitialized attribute _n_exprs");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__parser_nodes, 2408);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__parser_nodes, 2771);
+fatal_exit(1);
 }
-var67 = var69;
-RET_LABEL68:(void)0;
+var68 = var70;
+RET_LABEL69:(void)0;
 }
 }
 {
-var70 = nit___nit__AbstractCompilerVisitor___varargize(var_v, var_mpropdef, var_recv, var67);
+var71 = nit___nit__ANodes___standard__abstract_collection__Collection__is_empty(var68);
 }
-var_args71 = var70;
+if (var71){
 {
-{ /* Inline array#AbstractArrayRead#length (var_args71) on <var_args71:Array[RuntimeVariable]> */
-var74 = var_args71->attrs[COLOR_standard__array__AbstractArrayRead___length].l; /* _length on <var_args71:Array[RuntimeVariable]> */
+{ /* Inline abstract_compiler#AbstractCompilerVisitor#frame (var_v) on <var_v:AbstractCompilerVisitor> */
+var74 = var_v->attrs[COLOR_nit__abstract_compiler__AbstractCompilerVisitor___frame].val; /* _frame on <var_v:AbstractCompilerVisitor> */
 var72 = var74;
 RET_LABEL73:(void)0;
 }
 }
-var75 = 1;
-{
-{ /* Inline kernel#Int#== (var72,var75) on <var72:Int> */
-var78 = var72 == var75;
-var76 = var78;
-goto RET_LABEL77;
-RET_LABEL77:(void)0;
+if (var72 == NULL) {
+PRINT_ERROR("Runtime error: %s", "Receiver is null");
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 3151);
+fatal_exit(1);
+} else {
+{ /* Inline abstract_compiler#StaticFrame#arguments (var72) on <var72:nullable StaticFrame> */
+if (unlikely(var72 == NULL)) {
+PRINT_ERROR("Runtime error: %s", "Receiver is null");
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 1835);
+fatal_exit(1);
+}
+var77 = var72->attrs[COLOR_nit__abstract_compiler__StaticFrame___arguments].val; /* _arguments on <var72:nullable StaticFrame> */
+if (unlikely(var77 == NULL)) {
+PRINT_ERROR("Runtime error: %s", "Uninitialized attribute _arguments");
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 1835);
+fatal_exit(1);
+}
+var75 = var77;
+RET_LABEL76:(void)0;
 }
 }
-if (var76){
+var_args78 = var75;
+} else {
 {
-{ /* Inline abstract_compiler#AbstractCompilerVisitor#frame (var_v) on <var_v:AbstractCompilerVisitor> */
-var81 = var_v->attrs[COLOR_nit__abstract_compiler__AbstractCompilerVisitor___frame].val; /* _frame on <var_v:AbstractCompilerVisitor> */
+{ /* Inline typing#ASuperExpr#signaturemap (self) on <self:ASuperExpr> */
+var81 = self->attrs[COLOR_nit__typing__ASuperExpr___signaturemap].val; /* _signaturemap on <self:ASuperExpr> */
 var79 = var81;
 RET_LABEL80:(void)0;
 }
 }
-if (var79 == NULL) {
-PRINT_ERROR("Runtime error: %s", "Receiver is null");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 2891);
-show_backtrace(1);
-} else {
-{ /* Inline abstract_compiler#StaticFrame#arguments (var79) on <var79:nullable StaticFrame> */
-if (unlikely(var79 == NULL)) {
-PRINT_ERROR("Runtime error: %s", "Receiver is null");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 1731);
-show_backtrace(1);
-}
-var84 = var79->attrs[COLOR_nit__abstract_compiler__StaticFrame___arguments].val; /* _arguments on <var79:nullable StaticFrame> */
+{
+{ /* Inline parser_nodes#ASuperExpr#n_args (self) on <self:ASuperExpr> */
+var84 = self->attrs[COLOR_nit__parser_nodes__ASuperExpr___n_args].val; /* _n_args on <self:ASuperExpr> */
 if (unlikely(var84 == NULL)) {
-PRINT_ERROR("Runtime error: %s", "Uninitialized attribute _arguments");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 1731);
-show_backtrace(1);
+PRINT_ERROR("Runtime error: %s", "Uninitialized attribute _n_args");
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__parser_nodes, 2344);
+fatal_exit(1);
 }
 var82 = var84;
 RET_LABEL83:(void)0;
 }
 }
-var_args71 = var82;
-} else {
-}
 {
-{ /* Inline abstract_compiler#RuntimeVariable#mtype (var_recv) on <var_recv:RuntimeVariable> */
-var87 = var_recv->attrs[COLOR_nit__abstract_compiler__RuntimeVariable___mtype].val; /* _mtype on <var_recv:RuntimeVariable> */
+{ /* Inline parser_nodes#AExprs#n_exprs (var82) on <var82:AExprs> */
+var87 = var82->attrs[COLOR_nit__parser_nodes__AExprs___n_exprs].val; /* _n_exprs on <var82:AExprs> */
 if (unlikely(var87 == NULL)) {
-PRINT_ERROR("Runtime error: %s", "Uninitialized attribute _mtype");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 1680);
-show_backtrace(1);
+PRINT_ERROR("Runtime error: %s", "Uninitialized attribute _n_exprs");
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__parser_nodes, 2771);
+fatal_exit(1);
 }
 var85 = var87;
 RET_LABEL86:(void)0;
 }
 }
-/* <var85:MType> isa MClassType */
-cltype89 = type_nit__MClassType.color;
-idtype90 = type_nit__MClassType.id;
-if(cltype89 >= var85->type->table_size) {
-var88 = 0;
+{
+var88 = nit___nit__AbstractCompilerVisitor___varargize(var_v, var_mpropdef, var79, var_recv, var85);
+}
+var_args78 = var88;
+}
+{
+{ /* Inline abstract_compiler#RuntimeVariable#mtype (var_recv) on <var_recv:RuntimeVariable> */
+var91 = var_recv->attrs[COLOR_nit__abstract_compiler__RuntimeVariable___mtype].val; /* _mtype on <var_recv:RuntimeVariable> */
+if (unlikely(var91 == NULL)) {
+PRINT_ERROR("Runtime error: %s", "Uninitialized attribute _mtype");
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 1784);
+fatal_exit(1);
+}
+var89 = var91;
+RET_LABEL90:(void)0;
+}
+}
+/* <var89:MType> isa MClassType */
+cltype93 = type_nit__MClassType.color;
+idtype94 = type_nit__MClassType.id;
+if(cltype93 >= var89->type->table_size) {
+var92 = 0;
 } else {
-var88 = var85->type->type_table[cltype89] == idtype90;
+var92 = var89->type->type_table[cltype93] == idtype94;
 }
-if (unlikely(!var88)) {
-var_class_name91 = var85 == NULL ? "null" : var85->type->name;
-PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "MClassType", var_class_name91);
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 2895);
-show_backtrace(1);
+if (unlikely(!var92)) {
+var_class_name95 = var89 == NULL ? "null" : var89->type->name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "MClassType", var_class_name95);
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 3157);
+fatal_exit(1);
 }
 {
-var92 = nit___nit__SeparateCompilerVisitor___nit__abstract_compiler__AbstractCompilerVisitor__supercall(var_v, var_mpropdef, var85, var_args71);
+var96 = nit___nit__SeparateCompilerVisitor___nit__abstract_compiler__AbstractCompilerVisitor__supercall(var_v, var_mpropdef, var89, var_args78);
 }
-var = var92;
+var = var96;
 goto RET_LABEL;
 RET_LABEL:;
 return var;
@@ -4760,66 +5586,68 @@ val* var_v /* var v: AbstractCompilerVisitor */;
 val* var1 /* : nullable MClassType */;
 val* var3 /* : nullable MClassType */;
 val* var_mtype /* var mtype: nullable MClassType */;
-val* var4 /* : null */;
+short int var4 /* : Bool */;
 short int var5 /* : Bool */;
-short int var6 /* : Bool */;
 val* var_other /* var other: nullable Object */;
+short int var7 /* : Bool */;
 short int var8 /* : Bool */;
-short int var9 /* : Bool */;
-val* var10 /* : MClass */;
-val* var12 /* : MClass */;
-val* var13 /* : String */;
-val* var15 /* : String */;
+val* var9 /* : MClass */;
+val* var11 /* : MClass */;
+val* var12 /* : String */;
+val* var14 /* : String */;
 static val* varonce;
-val* var16 /* : String */;
-char* var17 /* : NativeString */;
-long var18 /* : Int */;
-val* var19 /* : FlatString */;
-short int var20 /* : Bool */;
+val* var15 /* : String */;
+char* var16 /* : NativeString */;
+val* var17 /* : FlatString */;
+short int var18 /* : Bool */;
+val* var19 /* : AExprs */;
 val* var21 /* : AExprs */;
-val* var23 /* : AExprs */;
+val* var22 /* : ANodes[AExpr] */;
 val* var24 /* : ANodes[AExpr] */;
-val* var26 /* : ANodes[AExpr] */;
-long var27 /* : Int */;
-long var28 /* : Int */;
-short int var29 /* : Bool */;
-short int var31 /* : Bool */;
-val* var32 /* : AExprs */;
-val* var34 /* : AExprs */;
-val* var35 /* : ANodes[AExpr] */;
-val* var37 /* : ANodes[AExpr] */;
-val* var38 /* : nullable Object */;
-val* var39 /* : null */;
-val* var40 /* : RuntimeVariable */;
+long var25 /* : Int */;
+short int var26 /* : Bool */;
+short int var28 /* : Bool */;
+val* var29 /* : AExprs */;
+val* var31 /* : AExprs */;
+val* var32 /* : ANodes[AExpr] */;
+val* var34 /* : ANodes[AExpr] */;
+val* var35 /* : nullable Object */;
+val* var36 /* : RuntimeVariable */;
 val* var_l /* var l: RuntimeVariable */;
-short int var41 /* : Bool */;
+short int var37 /* : Bool */;
 int cltype;
 int idtype;
-val* var42 /* : Array[MType] */;
-val* var44 /* : Array[MType] */;
-val* var45 /* : nullable Object */;
+val* var38 /* : Array[MType] */;
+val* var40 /* : Array[MType] */;
+val* var41 /* : nullable Object */;
 val* var_elttype /* var elttype: MType */;
-val* var46 /* : RuntimeVariable */;
-val* var47 /* : RuntimeVariable */;
+val* var42 /* : RuntimeVariable */;
+val* var43 /* : RuntimeVariable */;
 val* var_recv /* var recv: RuntimeVariable */;
-val* var48 /* : nullable CallSite */;
-val* var50 /* : nullable CallSite */;
-val* var_callsite /* var callsite: CallSite */;
-val* var51 /* : MMethodDef */;
-val* var53 /* : MMethodDef */;
-val* var54 /* : AExprs */;
-val* var56 /* : AExprs */;
-val* var57 /* : ANodes[AExpr] */;
-val* var59 /* : ANodes[AExpr] */;
-val* var60 /* : Array[RuntimeVariable] */;
+val* var44 /* : nullable CallSite */;
+val* var46 /* : nullable CallSite */;
+val* var_callsite /* var callsite: nullable CallSite */;
+short int var47 /* : Bool */;
+short int var48 /* : Bool */;
+val* var_other50 /* var other: nullable Object */;
+short int var51 /* : Bool */;
+short int var53 /* : Bool */;
+val* var54 /* : MMethodDef */;
+val* var56 /* : MMethodDef */;
+val* var57 /* : nullable SignatureMap */;
+val* var59 /* : nullable SignatureMap */;
+val* var60 /* : AExprs */;
+val* var62 /* : AExprs */;
+val* var63 /* : ANodes[AExpr] */;
+val* var65 /* : ANodes[AExpr] */;
+val* var66 /* : Array[RuntimeVariable] */;
 val* var_args /* var args: Array[RuntimeVariable] */;
-val* var61 /* : nullable RuntimeVariable */;
+val* var67 /* : nullable RuntimeVariable */;
 val* var_res2 /* var res2: nullable RuntimeVariable */;
-val* var62 /* : null */;
-short int var63 /* : Bool */;
-short int var64 /* : Bool */;
-short int var66 /* : Bool */;
-short int var67 /* : Bool */;
+short int var68 /* : Bool */;
+short int var69 /* : Bool */;
+short int var71 /* : Bool */;
+short int var72 /* : Bool */;
 var_v = p0;
 {
 { /* Inline typing#ANewExpr#recvtype (self) on <self:ANewExpr> */
@@ -4829,257 +5657,281 @@ RET_LABEL2:(void)0;
 }
 }
 var_mtype = var1;
-var4 = NULL;
 if (var_mtype == NULL) {
-var5 = 0; /* is null */
+var4 = 0; /* is null */
 } else {
-var5 = 1; /* arg is null and recv is not */
+var4 = 1; /* arg is null and recv is not */
 }
 if (0) {
-{ /* Inline kernel#Object#!= (var_mtype,var4) on <var_mtype:nullable MClassType> */
-var_other = var4;
+{ /* Inline kernel#Object#!= (var_mtype,((val*)NULL)) on <var_mtype:nullable MClassType> */
+var_other = ((val*)NULL);
 {
-var8 = ((short int (*)(val* self, val* p0))(var_mtype->class->vft[COLOR_standard__kernel__Object___61d_61d]))(var_mtype, var_other) /* == on <var_mtype:nullable MClassType(MClassType)>*/;
+var7 = ((short int(*)(val* self, val* p0))(var_mtype->class->vft[COLOR_standard__kernel__Object___61d_61d]))(var_mtype, var_other); /* == on <var_mtype:nullable MClassType(MClassType)>*/
 }
-var9 = !var8;
-var6 = var9;
-goto RET_LABEL7;
-RET_LABEL7:(void)0;
+var8 = !var7;
+var5 = var8;
+goto RET_LABEL6;
+RET_LABEL6:(void)0;
 }
-var5 = var6;
+var4 = var5;
 }
-if (unlikely(!var5)) {
+if (unlikely(!var4)) {
 PRINT_ERROR("Runtime error: %s", "Assert failed");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 2903);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 3165);
+fatal_exit(1);
 }
 {
 { /* Inline model#MClassType#mclass (var_mtype) on <var_mtype:nullable MClassType(MClassType)> */
-var12 = var_mtype->attrs[COLOR_nit__model__MClassType___mclass].val; /* _mclass on <var_mtype:nullable MClassType(MClassType)> */
-if (unlikely(var12 == NULL)) {
+var11 = var_mtype->attrs[COLOR_nit__model__MClassType___mclass].val; /* _mclass on <var_mtype:nullable MClassType(MClassType)> */
+if (unlikely(var11 == NULL)) {
 PRINT_ERROR("Runtime error: %s", "Uninitialized attribute _mclass");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__model, 1058);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__model, 1138);
+fatal_exit(1);
 }
-var10 = var12;
-RET_LABEL11:(void)0;
+var9 = var11;
+RET_LABEL10:(void)0;
 }
 }
 {
-{ /* Inline model#MClass#name (var10) on <var10:MClass> */
-var15 = var10->attrs[COLOR_nit__model__MClass___name].val; /* _name on <var10:MClass> */
-if (unlikely(var15 == NULL)) {
+{ /* Inline model#MClass#name (var9) on <var9:MClass> */
+var14 = var9->attrs[COLOR_nit__model__MClass___name].val; /* _name on <var9:MClass> */
+if (unlikely(var14 == NULL)) {
 PRINT_ERROR("Runtime error: %s", "Uninitialized attribute _name");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__model, 348);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__model, 362);
+fatal_exit(1);
 }
-var13 = var15;
-RET_LABEL14:(void)0;
+var12 = var14;
+RET_LABEL13:(void)0;
 }
 }
-if (varonce) {
-var16 = varonce;
+if (likely(varonce!=NULL)) {
+var15 = varonce;
 } else {
-var17 = "NativeArray";
-var18 = 11;
-var19 = standard___standard__NativeString___to_s_with_length(var17, var18);
-var16 = var19;
-varonce = var16;
+var16 = "NativeArray";
+var17 = standard___standard__NativeString___to_s_with_length(var16, 11l);
+var15 = var17;
+varonce = var15;
 }
 {
-var20 = ((short int (*)(val* self, val* p0))(var13->class->vft[COLOR_standard__kernel__Object___61d_61d]))(var13, var16) /* == on <var13:String>*/;
+var18 = ((short int(*)(val* self, val* p0))(var12->class->vft[COLOR_standard__kernel__Object___61d_61d]))(var12, var15); /* == on <var12:String>*/
 }
-if (var20){
+if (var18){
 {
 { /* Inline parser_nodes#ANewExpr#n_args (self) on <self:ANewExpr> */
-var23 = self->attrs[COLOR_nit__parser_nodes__ANewExpr___n_args].val; /* _n_args on <self:ANewExpr> */
-if (unlikely(var23 == NULL)) {
+var21 = self->attrs[COLOR_nit__parser_nodes__ANewExpr___n_args].val; /* _n_args on <self:ANewExpr> */
+if (unlikely(var21 == NULL)) {
 PRINT_ERROR("Runtime error: %s", "Uninitialized attribute _n_args");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__parser_nodes, 1968);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__parser_nodes, 2261);
+fatal_exit(1);
 }
-var21 = var23;
-RET_LABEL22:(void)0;
+var19 = var21;
+RET_LABEL20:(void)0;
 }
 }
 {
-{ /* Inline parser_nodes#AExprs#n_exprs (var21) on <var21:AExprs> */
-var26 = var21->attrs[COLOR_nit__parser_nodes__AExprs___n_exprs].val; /* _n_exprs on <var21:AExprs> */
-if (unlikely(var26 == NULL)) {
+{ /* Inline parser_nodes#AExprs#n_exprs (var19) on <var19:AExprs> */
+var24 = var19->attrs[COLOR_nit__parser_nodes__AExprs___n_exprs].val; /* _n_exprs on <var19:AExprs> */
+if (unlikely(var24 == NULL)) {
 PRINT_ERROR("Runtime error: %s", "Uninitialized attribute _n_exprs");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__parser_nodes, 2408);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__parser_nodes, 2771);
+fatal_exit(1);
 }
-var24 = var26;
-RET_LABEL25:(void)0;
+var22 = var24;
+RET_LABEL23:(void)0;
 }
 }
 {
-var27 = nit___nit__ANodes___standard__abstract_collection__Collection__length(var24);
+var25 = nit___nit__ANodes___standard__abstract_collection__Collection__length(var22);
 }
-var28 = 1;
 {
-{ /* Inline kernel#Int#== (var27,var28) on <var27:Int> */
-var31 = var27 == var28;
-var29 = var31;
-goto RET_LABEL30;
-RET_LABEL30:(void)0;
+{ /* Inline kernel#Int#== (var25,1l) on <var25:Int> */
+var28 = var25 == 1l;
+var26 = var28;
+goto RET_LABEL27;
+RET_LABEL27:(void)0;
 }
 }
-if (unlikely(!var29)) {
+if (unlikely(!var26)) {
 PRINT_ERROR("Runtime error: %s", "Assert failed");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 2906);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 3168);
+fatal_exit(1);
 }
 {
 { /* Inline parser_nodes#ANewExpr#n_args (self) on <self:ANewExpr> */
-var34 = self->attrs[COLOR_nit__parser_nodes__ANewExpr___n_args].val; /* _n_args on <self:ANewExpr> */
-if (unlikely(var34 == NULL)) {
+var31 = self->attrs[COLOR_nit__parser_nodes__ANewExpr___n_args].val; /* _n_args on <self:ANewExpr> */
+if (unlikely(var31 == NULL)) {
 PRINT_ERROR("Runtime error: %s", "Uninitialized attribute _n_args");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__parser_nodes, 1968);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__parser_nodes, 2261);
+fatal_exit(1);
 }
-var32 = var34;
-RET_LABEL33:(void)0;
+var29 = var31;
+RET_LABEL30:(void)0;
 }
 }
 {
-{ /* Inline parser_nodes#AExprs#n_exprs (var32) on <var32:AExprs> */
-var37 = var32->attrs[COLOR_nit__parser_nodes__AExprs___n_exprs].val; /* _n_exprs on <var32:AExprs> */
-if (unlikely(var37 == NULL)) {
+{ /* Inline parser_nodes#AExprs#n_exprs (var29) on <var29:AExprs> */
+var34 = var29->attrs[COLOR_nit__parser_nodes__AExprs___n_exprs].val; /* _n_exprs on <var29:AExprs> */
+if (unlikely(var34 == NULL)) {
 PRINT_ERROR("Runtime error: %s", "Uninitialized attribute _n_exprs");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__parser_nodes, 2408);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__parser_nodes, 2771);
+fatal_exit(1);
 }
-var35 = var37;
-RET_LABEL36:(void)0;
+var32 = var34;
+RET_LABEL33:(void)0;
 }
 }
 {
-var38 = standard___standard__SequenceRead___Collection__first(var35);
+var35 = standard___standard__SequenceRead___Collection__first(var32);
 }
-var39 = NULL;
 {
-var40 = nit___nit__AbstractCompilerVisitor___expr(var_v, var38, var39);
+var36 = nit___nit__AbstractCompilerVisitor___expr(var_v, var35, ((val*)NULL));
 }
-var_l = var40;
+var_l = var36;
 /* <var_mtype:nullable MClassType(MClassType)> isa MGenericType */
 cltype = type_nit__MGenericType.color;
 idtype = type_nit__MGenericType.id;
 if(cltype >= var_mtype->type->table_size) {
-var41 = 0;
+var37 = 0;
 } else {
-var41 = var_mtype->type->type_table[cltype] == idtype;
+var37 = var_mtype->type->type_table[cltype] == idtype;
 }
-if (unlikely(!var41)) {
+if (unlikely(!var37)) {
 PRINT_ERROR("Runtime error: %s", "Assert failed");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 2908);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 3170);
+fatal_exit(1);
 }
 {
 { /* Inline model#MGenericType#arguments (var_mtype) on <var_mtype:nullable MClassType(MGenericType)> */
-var44 = var_mtype->attrs[COLOR_nit__model__MGenericType___arguments].val; /* _arguments on <var_mtype:nullable MClassType(MGenericType)> */
-if (unlikely(var44 == NULL)) {
+var40 = var_mtype->attrs[COLOR_nit__model__MGenericType___arguments].val; /* _arguments on <var_mtype:nullable MClassType(MGenericType)> */
+if (unlikely(var40 == NULL)) {
 PRINT_ERROR("Runtime error: %s", "Uninitialized attribute _arguments");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__model, 1164);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__model, 1244);
+fatal_exit(1);
 }
-var42 = var44;
-RET_LABEL43:(void)0;
+var38 = var40;
+RET_LABEL39:(void)0;
 }
 }
 {
-var45 = standard___standard__SequenceRead___Collection__first(var42);
+var41 = standard___standard__SequenceRead___Collection__first(var38);
 }
-var_elttype = var45;
+var_elttype = var41;
 {
-var46 = ((val* (*)(val* self, val* p0, val* p1))(var_v->class->vft[COLOR_nit__abstract_compiler__AbstractCompilerVisitor__native_array_instance]))(var_v, var_elttype, var_l) /* native_array_instance on <var_v:AbstractCompilerVisitor>*/;
+var42 = ((val*(*)(val* self, val* p0, val* p1))(var_v->class->vft[COLOR_nit__abstract_compiler__AbstractCompilerVisitor__native_array_instance]))(var_v, var_elttype, var_l); /* native_array_instance on <var_v:AbstractCompilerVisitor>*/
 }
-var = var46;
+var = var42;
 goto RET_LABEL;
 } else {
 }
 {
-var47 = nit___nit__AbstractCompilerVisitor___init_instance_or_extern(var_v, var_mtype);
+var43 = nit___nit__AbstractCompilerVisitor___init_instance_or_extern(var_v, var_mtype);
 }
-var_recv = var47;
+var_recv = var43;
 {
 { /* Inline typing#ANewExpr#callsite (self) on <self:ANewExpr> */
-var50 = self->attrs[COLOR_nit__typing__ANewExpr___callsite].val; /* _callsite on <self:ANewExpr> */
-var48 = var50;
-RET_LABEL49:(void)0;
+var46 = self->attrs[COLOR_nit__typing__ANewExpr___callsite].val; /* _callsite on <self:ANewExpr> */
+var44 = var46;
+RET_LABEL45:(void)0;
 }
 }
-if (unlikely(var48 == NULL)) {
-PRINT_ERROR("Runtime error: %s", "Cast failed");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 2915);
-show_backtrace(1);
+var_callsite = var44;
+if (var_callsite == NULL) {
+var47 = 1; /* is null */
+} else {
+var47 = 0; /* arg is null but recv is not */
 }
-var_callsite = var48;
+if (0) {
+{ /* Inline kernel#Object#== (var_callsite,((val*)NULL)) on <var_callsite:nullable CallSite> */
+var_other50 = ((val*)NULL);
 {
-{ /* Inline typing#CallSite#mpropdef (var_callsite) on <var_callsite:CallSite> */
-var53 = var_callsite->attrs[COLOR_nit__typing__CallSite___mpropdef].val; /* _mpropdef on <var_callsite:CallSite> */
-if (unlikely(var53 == NULL)) {
-PRINT_ERROR("Runtime error: %s", "Uninitialized attribute _mpropdef");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__typing, 490);
-show_backtrace(1);
-}
+{ /* Inline kernel#Object#is_same_instance (var_callsite,var_other50) on <var_callsite:nullable CallSite(CallSite)> */
+var53 = var_callsite == var_other50;
 var51 = var53;
+goto RET_LABEL52;
 RET_LABEL52:(void)0;
 }
 }
+var48 = var51;
+goto RET_LABEL49;
+RET_LABEL49:(void)0;
+}
+var47 = var48;
+}
+if (var47){
+var = var_recv;
+goto RET_LABEL;
+} else {
+}
 {
-{ /* Inline parser_nodes#ANewExpr#n_args (self) on <self:ANewExpr> */
-var56 = self->attrs[COLOR_nit__parser_nodes__ANewExpr___n_args].val; /* _n_args on <self:ANewExpr> */
+{ /* Inline typing#CallSite#mpropdef (var_callsite) on <var_callsite:nullable CallSite(CallSite)> */
+var56 = var_callsite->attrs[COLOR_nit__typing__CallSite___mpropdef].val; /* _mpropdef on <var_callsite:nullable CallSite(CallSite)> */
 if (unlikely(var56 == NULL)) {
-PRINT_ERROR("Runtime error: %s", "Uninitialized attribute _n_args");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__parser_nodes, 1968);
-show_backtrace(1);
+PRINT_ERROR("Runtime error: %s", "Uninitialized attribute _mpropdef");
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__typing, 627);
+fatal_exit(1);
 }
 var54 = var56;
 RET_LABEL55:(void)0;
 }
 }
 {
-{ /* Inline parser_nodes#AExprs#n_exprs (var54) on <var54:AExprs> */
-var59 = var54->attrs[COLOR_nit__parser_nodes__AExprs___n_exprs].val; /* _n_exprs on <var54:AExprs> */
-if (unlikely(var59 == NULL)) {
-PRINT_ERROR("Runtime error: %s", "Uninitialized attribute _n_exprs");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__parser_nodes, 2408);
-show_backtrace(1);
-}
+{ /* Inline typing#CallSite#signaturemap (var_callsite) on <var_callsite:nullable CallSite(CallSite)> */
+var59 = var_callsite->attrs[COLOR_nit__typing__CallSite___signaturemap].val; /* _signaturemap on <var_callsite:nullable CallSite(CallSite)> */
 var57 = var59;
 RET_LABEL58:(void)0;
 }
 }
 {
-var60 = nit___nit__AbstractCompilerVisitor___varargize(var_v, var51, var_recv, var57);
+{ /* Inline parser_nodes#ANewExpr#n_args (self) on <self:ANewExpr> */
+var62 = self->attrs[COLOR_nit__parser_nodes__ANewExpr___n_args].val; /* _n_args on <self:ANewExpr> */
+if (unlikely(var62 == NULL)) {
+PRINT_ERROR("Runtime error: %s", "Uninitialized attribute _n_args");
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__parser_nodes, 2261);
+fatal_exit(1);
+}
+var60 = var62;
+RET_LABEL61:(void)0;
+}
 }
-var_args = var60;
 {
-var61 = ((val* (*)(val* self, val* p0, val* p1))(var_v->class->vft[COLOR_nit__abstract_compiler__AbstractCompilerVisitor__compile_callsite]))(var_v, var_callsite, var_args) /* compile_callsite on <var_v:AbstractCompilerVisitor>*/;
+{ /* Inline parser_nodes#AExprs#n_exprs (var60) on <var60:AExprs> */
+var65 = var60->attrs[COLOR_nit__parser_nodes__AExprs___n_exprs].val; /* _n_exprs on <var60:AExprs> */
+if (unlikely(var65 == NULL)) {
+PRINT_ERROR("Runtime error: %s", "Uninitialized attribute _n_exprs");
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__parser_nodes, 2771);
+fatal_exit(1);
+}
+var63 = var65;
+RET_LABEL64:(void)0;
+}
+}
+{
+var66 = nit___nit__AbstractCompilerVisitor___varargize(var_v, var54, var57, var_recv, var63);
+}
+var_args = var66;
+{
+var67 = ((val*(*)(val* self, val* p0, val* p1))(var_v->class->vft[COLOR_nit__abstract_compiler__AbstractCompilerVisitor__compile_callsite]))(var_v, var_callsite, var_args); /* compile_callsite on <var_v:AbstractCompilerVisitor>*/
 }
-var_res2 = var61;
-var62 = NULL;
+var_res2 = var67;
 if (var_res2 == NULL) {
-var63 = 0; /* is null */
+var68 = 0; /* is null */
 } else {
-var63 = 1; /* arg is null and recv is not */
+var68 = 1; /* arg is null and recv is not */
 }
 if (0) {
-{ /* Inline kernel#Object#!= (var_res2,var62) on <var_res2:nullable RuntimeVariable> */
-var_other = var62;
+{ /* Inline kernel#Object#!= (var_res2,((val*)NULL)) on <var_res2:nullable RuntimeVariable> */
+var_other = ((val*)NULL);
 {
-var66 = ((short int (*)(val* self, val* p0))(var_res2->class->vft[COLOR_standard__kernel__Object___61d_61d]))(var_res2, var_other) /* == on <var_res2:nullable RuntimeVariable(RuntimeVariable)>*/;
+var71 = ((short int(*)(val* self, val* p0))(var_res2->class->vft[COLOR_standard__kernel__Object___61d_61d]))(var_res2, var_other); /* == on <var_res2:nullable RuntimeVariable(RuntimeVariable)>*/
 }
-var67 = !var66;
-var64 = var67;
-goto RET_LABEL65;
-RET_LABEL65:(void)0;
+var72 = !var71;
+var69 = var72;
+goto RET_LABEL70;
+RET_LABEL70:(void)0;
 }
-var63 = var64;
+var68 = var69;
 }
-if (var63){
+if (var68){
 var = var_res2;
 goto RET_LABEL;
 } else {
@@ -5095,48 +5947,46 @@ val* var /* : nullable RuntimeVariable */;
 val* var_v /* var v: AbstractCompilerVisitor */;
 val* var1 /* : AExpr */;
 val* var3 /* : AExpr */;
-val* var4 /* : null */;
-val* var5 /* : RuntimeVariable */;
+val* var4 /* : RuntimeVariable */;
 val* var_recv /* var recv: RuntimeVariable */;
-val* var6 /* : nullable MAttribute */;
-val* var8 /* : nullable MAttribute */;
+val* var5 /* : nullable MAttribute */;
+val* var7 /* : nullable MAttribute */;
 val* var_mproperty /* var mproperty: MAttribute */;
-val* var9 /* : RuntimeVariable */;
+val* var8 /* : RuntimeVariable */;
 var_v = p0;
 {
 { /* Inline parser_nodes#AAttrFormExpr#n_expr (self) on <self:AAttrExpr> */
 var3 = self->attrs[COLOR_nit__parser_nodes__AAttrFormExpr___n_expr].val; /* _n_expr on <self:AAttrExpr> */
 if (unlikely(var3 == NULL)) {
 PRINT_ERROR("Runtime error: %s", "Uninitialized attribute _n_expr");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__parser_nodes, 1976);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__parser_nodes, 2269);
+fatal_exit(1);
 }
 var1 = var3;
 RET_LABEL2:(void)0;
 }
 }
-var4 = NULL;
 {
-var5 = nit___nit__AbstractCompilerVisitor___expr(var_v, var1, var4);
+var4 = nit___nit__AbstractCompilerVisitor___expr(var_v, var1, ((val*)NULL));
 }
-var_recv = var5;
+var_recv = var4;
 {
 { /* Inline typing#AAttrFormExpr#mproperty (self) on <self:AAttrExpr> */
-var8 = self->attrs[COLOR_nit__typing__AAttrFormExpr___mproperty].val; /* _mproperty on <self:AAttrExpr> */
-var6 = var8;
-RET_LABEL7:(void)0;
+var7 = self->attrs[COLOR_nit__typing__AAttrFormExpr___mproperty].val; /* _mproperty on <self:AAttrExpr> */
+var5 = var7;
+RET_LABEL6:(void)0;
 }
 }
-if (unlikely(var6 == NULL)) {
+if (unlikely(var5 == NULL)) {
 PRINT_ERROR("Runtime error: %s", "Cast failed");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 2930);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 3194);
+fatal_exit(1);
 }
-var_mproperty = var6;
+var_mproperty = var5;
 {
-var9 = nit___nit__SeparateCompilerVisitor___nit__abstract_compiler__AbstractCompilerVisitor__read_attribute(var_v, var_mproperty, var_recv);
+var8 = nit___nit__SeparateCompilerVisitor___nit__abstract_compiler__AbstractCompilerVisitor__read_attribute(var_v, var_mproperty, var_recv);
 }
-var = var9;
+var = var8;
 goto RET_LABEL;
 RET_LABEL:;
 return var;
@@ -5147,16 +5997,14 @@ val* var /* : nullable RuntimeVariable */;
 val* var_v /* var v: AbstractCompilerVisitor */;
 val* var1 /* : AExpr */;
 val* var3 /* : AExpr */;
-val* var4 /* : null */;
-val* var5 /* : RuntimeVariable */;
+val* var4 /* : RuntimeVariable */;
 val* var_recv /* var recv: RuntimeVariable */;
-val* var6 /* : AExpr */;
-val* var8 /* : AExpr */;
-val* var9 /* : null */;
-val* var10 /* : RuntimeVariable */;
+val* var5 /* : AExpr */;
+val* var7 /* : AExpr */;
+val* var8 /* : RuntimeVariable */;
 val* var_i /* var i: RuntimeVariable */;
+val* var9 /* : nullable MAttribute */;
 val* var11 /* : nullable MAttribute */;
-val* var13 /* : nullable MAttribute */;
 val* var_mproperty /* var mproperty: MAttribute */;
 var_v = p0;
 {
@@ -5164,48 +6012,46 @@ var_v = p0;
 var3 = self->attrs[COLOR_nit__parser_nodes__AAttrFormExpr___n_expr].val; /* _n_expr on <self:AAttrAssignExpr> */
 if (unlikely(var3 == NULL)) {
 PRINT_ERROR("Runtime error: %s", "Uninitialized attribute _n_expr");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__parser_nodes, 1976);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__parser_nodes, 2269);
+fatal_exit(1);
 }
 var1 = var3;
 RET_LABEL2:(void)0;
 }
 }
-var4 = NULL;
 {
-var5 = nit___nit__AbstractCompilerVisitor___expr(var_v, var1, var4);
+var4 = nit___nit__AbstractCompilerVisitor___expr(var_v, var1, ((val*)NULL));
 }
-var_recv = var5;
+var_recv = var4;
 {
 { /* Inline parser_nodes#AAssignFormExpr#n_value (self) on <self:AAttrAssignExpr> */
-var8 = self->attrs[COLOR_nit__parser_nodes__AAssignFormExpr___n_value].val; /* _n_value on <self:AAttrAssignExpr> */
-if (unlikely(var8 == NULL)) {
+var7 = self->attrs[COLOR_nit__parser_nodes__AAssignFormExpr___n_value].val; /* _n_value on <self:AAttrAssignExpr> */
+if (unlikely(var7 == NULL)) {
 PRINT_ERROR("Runtime error: %s", "Uninitialized attribute _n_value");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__parser_nodes, 1772);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__parser_nodes, 1995);
+fatal_exit(1);
 }
-var6 = var8;
-RET_LABEL7:(void)0;
+var5 = var7;
+RET_LABEL6:(void)0;
 }
 }
-var9 = NULL;
 {
-var10 = nit___nit__AbstractCompilerVisitor___expr(var_v, var6, var9);
+var8 = nit___nit__AbstractCompilerVisitor___expr(var_v, var5, ((val*)NULL));
 }
-var_i = var10;
+var_i = var8;
 {
 { /* Inline typing#AAttrFormExpr#mproperty (self) on <self:AAttrAssignExpr> */
-var13 = self->attrs[COLOR_nit__typing__AAttrFormExpr___mproperty].val; /* _mproperty on <self:AAttrAssignExpr> */
-var11 = var13;
-RET_LABEL12:(void)0;
+var11 = self->attrs[COLOR_nit__typing__AAttrFormExpr___mproperty].val; /* _mproperty on <self:AAttrAssignExpr> */
+var9 = var11;
+RET_LABEL10:(void)0;
 }
 }
-if (unlikely(var11 == NULL)) {
+if (unlikely(var9 == NULL)) {
 PRINT_ERROR("Runtime error: %s", "Cast failed");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 2940);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 3204);
+fatal_exit(1);
 }
-var_mproperty = var11;
+var_mproperty = var9;
 {
 nit___nit__SeparateCompilerVisitor___nit__abstract_compiler__AbstractCompilerVisitor__write_attribute(var_v, var_mproperty, var_recv, var_i); /* Direct call separate_compiler#SeparateCompilerVisitor#write_attribute on <var_v:AbstractCompilerVisitor>*/
 }
@@ -5219,102 +6065,95 @@ void nit__abstract_compiler___AAttrReassignExpr___AExpr__stmt(val* self, val* p0
 val* var_v /* var v: AbstractCompilerVisitor */;
 val* var /* : AExpr */;
 val* var2 /* : AExpr */;
-val* var3 /* : null */;
-val* var4 /* : RuntimeVariable */;
+val* var3 /* : RuntimeVariable */;
 val* var_recv /* var recv: RuntimeVariable */;
-val* var5 /* : AExpr */;
-val* var7 /* : AExpr */;
-val* var8 /* : null */;
-val* var9 /* : RuntimeVariable */;
+val* var4 /* : AExpr */;
+val* var6 /* : AExpr */;
+val* var7 /* : RuntimeVariable */;
 val* var_value /* var value: RuntimeVariable */;
+val* var8 /* : nullable MAttribute */;
 val* var10 /* : nullable MAttribute */;
-val* var12 /* : nullable MAttribute */;
 val* var_mproperty /* var mproperty: MAttribute */;
-val* var13 /* : RuntimeVariable */;
+val* var11 /* : RuntimeVariable */;
 val* var_attr /* var attr: RuntimeVariable */;
+val* var12 /* : nullable CallSite */;
 val* var14 /* : nullable CallSite */;
-val* var16 /* : nullable CallSite */;
-val* var17 /* : Array[RuntimeVariable] */;
-long var18 /* : Int */;
+val* var15 /* : Array[RuntimeVariable] */;
 val* var_ /* var : Array[RuntimeVariable] */;
-val* var19 /* : nullable RuntimeVariable */;
+val* var16 /* : nullable RuntimeVariable */;
 val* var_res /* var res: nullable RuntimeVariable */;
-val* var20 /* : null */;
-short int var21 /* : Bool */;
-short int var22 /* : Bool */;
+short int var17 /* : Bool */;
+short int var18 /* : Bool */;
 val* var_other /* var other: nullable Object */;
-short int var24 /* : Bool */;
-short int var25 /* : Bool */;
+short int var20 /* : Bool */;
+short int var21 /* : Bool */;
 var_v = p0;
 {
 { /* Inline parser_nodes#AAttrFormExpr#n_expr (self) on <self:AAttrReassignExpr> */
 var2 = self->attrs[COLOR_nit__parser_nodes__AAttrFormExpr___n_expr].val; /* _n_expr on <self:AAttrReassignExpr> */
 if (unlikely(var2 == NULL)) {
 PRINT_ERROR("Runtime error: %s", "Uninitialized attribute _n_expr");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__parser_nodes, 1976);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__parser_nodes, 2269);
+fatal_exit(1);
 }
 var = var2;
 RET_LABEL1:(void)0;
 }
 }
-var3 = NULL;
 {
-var4 = nit___nit__AbstractCompilerVisitor___expr(var_v, var, var3);
+var3 = nit___nit__AbstractCompilerVisitor___expr(var_v, var, ((val*)NULL));
 }
-var_recv = var4;
+var_recv = var3;
 {
 { /* Inline parser_nodes#AReassignFormExpr#n_value (self) on <self:AAttrReassignExpr> */
-var7 = self->attrs[COLOR_nit__parser_nodes__AReassignFormExpr___n_value].val; /* _n_value on <self:AAttrReassignExpr> */
-if (unlikely(var7 == NULL)) {
+var6 = self->attrs[COLOR_nit__parser_nodes__AReassignFormExpr___n_value].val; /* _n_value on <self:AAttrReassignExpr> */
+if (unlikely(var6 == NULL)) {
 PRINT_ERROR("Runtime error: %s", "Uninitialized attribute _n_value");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__parser_nodes, 1783);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__parser_nodes, 2006);
+fatal_exit(1);
 }
-var5 = var7;
-RET_LABEL6:(void)0;
+var4 = var6;
+RET_LABEL5:(void)0;
 }
 }
-var8 = NULL;
 {
-var9 = nit___nit__AbstractCompilerVisitor___expr(var_v, var5, var8);
+var7 = nit___nit__AbstractCompilerVisitor___expr(var_v, var4, ((val*)NULL));
 }
-var_value = var9;
+var_value = var7;
 {
 { /* Inline typing#AAttrFormExpr#mproperty (self) on <self:AAttrReassignExpr> */
-var12 = self->attrs[COLOR_nit__typing__AAttrFormExpr___mproperty].val; /* _mproperty on <self:AAttrReassignExpr> */
-var10 = var12;
-RET_LABEL11:(void)0;
+var10 = self->attrs[COLOR_nit__typing__AAttrFormExpr___mproperty].val; /* _mproperty on <self:AAttrReassignExpr> */
+var8 = var10;
+RET_LABEL9:(void)0;
 }
 }
-if (unlikely(var10 == NULL)) {
+if (unlikely(var8 == NULL)) {
 PRINT_ERROR("Runtime error: %s", "Cast failed");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 2951);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 3215);
+fatal_exit(1);
 }
-var_mproperty = var10;
+var_mproperty = var8;
 {
-var13 = nit___nit__SeparateCompilerVisitor___nit__abstract_compiler__AbstractCompilerVisitor__read_attribute(var_v, var_mproperty, var_recv);
+var11 = nit___nit__SeparateCompilerVisitor___nit__abstract_compiler__AbstractCompilerVisitor__read_attribute(var_v, var_mproperty, var_recv);
 }
-var_attr = var13;
+var_attr = var11;
 {
 { /* Inline typing#AReassignFormExpr#reassign_callsite (self) on <self:AAttrReassignExpr> */
-var16 = self->attrs[COLOR_nit__typing__AReassignFormExpr___reassign_callsite].val; /* _reassign_callsite on <self:AAttrReassignExpr> */
-var14 = var16;
-RET_LABEL15:(void)0;
+var14 = self->attrs[COLOR_nit__typing__AReassignFormExpr___reassign_callsite].val; /* _reassign_callsite on <self:AAttrReassignExpr> */
+var12 = var14;
+RET_LABEL13:(void)0;
 }
 }
-if (unlikely(var14 == NULL)) {
+if (unlikely(var12 == NULL)) {
 PRINT_ERROR("Runtime error: %s", "Cast failed");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 2953);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 3217);
+fatal_exit(1);
 }
-var17 = NEW_standard__Array(&type_standard__Array__nit__RuntimeVariable);
-var18 = 2;
+var15 = NEW_standard__Array(&type_standard__Array__nit__RuntimeVariable);
 {
-standard___standard__Array___with_capacity(var17, var18); /* Direct call array#Array#with_capacity on <var17:Array[RuntimeVariable]>*/
+standard___standard__Array___with_capacity(var15, 2l); /* Direct call array#Array#with_capacity on <var15:Array[RuntimeVariable]>*/
 }
-var_ = var17;
+var_ = var15;
 {
 standard___standard__AbstractArray___standard__abstract_collection__Sequence__push(var_, var_attr); /* Direct call array#AbstractArray#push on <var_:Array[RuntimeVariable]>*/
 }
@@ -5322,32 +6161,31 @@ standard___standard__AbstractArray___standard__abstract_collection__Sequence__pu
 standard___standard__AbstractArray___standard__abstract_collection__Sequence__push(var_, var_value); /* Direct call array#AbstractArray#push on <var_:Array[RuntimeVariable]>*/
 }
 {
-var19 = ((val* (*)(val* self, val* p0, val* p1))(var_v->class->vft[COLOR_nit__abstract_compiler__AbstractCompilerVisitor__compile_callsite]))(var_v, var14, var_) /* compile_callsite on <var_v:AbstractCompilerVisitor>*/;
+var16 = ((val*(*)(val* self, val* p0, val* p1))(var_v->class->vft[COLOR_nit__abstract_compiler__AbstractCompilerVisitor__compile_callsite]))(var_v, var12, var_); /* compile_callsite on <var_v:AbstractCompilerVisitor>*/
 }
-var_res = var19;
-var20 = NULL;
+var_res = var16;
 if (var_res == NULL) {
-var21 = 0; /* is null */
+var17 = 0; /* is null */
 } else {
-var21 = 1; /* arg is null and recv is not */
+var17 = 1; /* arg is null and recv is not */
 }
 if (0) {
-{ /* Inline kernel#Object#!= (var_res,var20) on <var_res:nullable RuntimeVariable> */
-var_other = var20;
+{ /* Inline kernel#Object#!= (var_res,((val*)NULL)) on <var_res:nullable RuntimeVariable> */
+var_other = ((val*)NULL);
 {
-var24 = ((short int (*)(val* self, val* p0))(var_res->class->vft[COLOR_standard__kernel__Object___61d_61d]))(var_res, var_other) /* == on <var_res:nullable RuntimeVariable(RuntimeVariable)>*/;
+var20 = ((short int(*)(val* self, val* p0))(var_res->class->vft[COLOR_standard__kernel__Object___61d_61d]))(var_res, var_other); /* == on <var_res:nullable RuntimeVariable(RuntimeVariable)>*/
 }
-var25 = !var24;
-var22 = var25;
-goto RET_LABEL23;
-RET_LABEL23:(void)0;
+var21 = !var20;
+var18 = var21;
+goto RET_LABEL19;
+RET_LABEL19:(void)0;
 }
-var21 = var22;
+var17 = var18;
 }
-if (unlikely(!var21)) {
+if (unlikely(!var17)) {
 PRINT_ERROR("Runtime error: %s", "Assert failed");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 2954);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 3218);
+fatal_exit(1);
 }
 {
 nit___nit__SeparateCompilerVisitor___nit__abstract_compiler__AbstractCompilerVisitor__write_attribute(var_v, var_mproperty, var_recv, var_res); /* Direct call separate_compiler#SeparateCompilerVisitor#write_attribute on <var_v:AbstractCompilerVisitor>*/
@@ -5360,48 +6198,102 @@ val* var /* : nullable RuntimeVariable */;
 val* var_v /* var v: AbstractCompilerVisitor */;
 val* var1 /* : AExpr */;
 val* var3 /* : AExpr */;
-val* var4 /* : null */;
-val* var5 /* : RuntimeVariable */;
+val* var4 /* : RuntimeVariable */;
 val* var_recv /* var recv: RuntimeVariable */;
-val* var6 /* : nullable MAttribute */;
-val* var8 /* : nullable MAttribute */;
+val* var5 /* : nullable MAttribute */;
+val* var7 /* : nullable MAttribute */;
 val* var_mproperty /* var mproperty: MAttribute */;
-val* var9 /* : RuntimeVariable */;
+val* var8 /* : RuntimeVariable */;
 var_v = p0;
 {
 { /* Inline parser_nodes#AAttrFormExpr#n_expr (self) on <self:AIssetAttrExpr> */
 var3 = self->attrs[COLOR_nit__parser_nodes__AAttrFormExpr___n_expr].val; /* _n_expr on <self:AIssetAttrExpr> */
 if (unlikely(var3 == NULL)) {
 PRINT_ERROR("Runtime error: %s", "Uninitialized attribute _n_expr");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__parser_nodes, 1976);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__parser_nodes, 2269);
+fatal_exit(1);
 }
 var1 = var3;
 RET_LABEL2:(void)0;
 }
 }
-var4 = NULL;
 {
-var5 = nit___nit__AbstractCompilerVisitor___expr(var_v, var1, var4);
+var4 = nit___nit__AbstractCompilerVisitor___expr(var_v, var1, ((val*)NULL));
 }
-var_recv = var5;
+var_recv = var4;
 {
 { /* Inline typing#AAttrFormExpr#mproperty (self) on <self:AIssetAttrExpr> */
-var8 = self->attrs[COLOR_nit__typing__AAttrFormExpr___mproperty].val; /* _mproperty on <self:AIssetAttrExpr> */
-var6 = var8;
-RET_LABEL7:(void)0;
+var7 = self->attrs[COLOR_nit__typing__AAttrFormExpr___mproperty].val; /* _mproperty on <self:AIssetAttrExpr> */
+var5 = var7;
+RET_LABEL6:(void)0;
 }
 }
-if (unlikely(var6 == NULL)) {
+if (unlikely(var5 == NULL)) {
 PRINT_ERROR("Runtime error: %s", "Cast failed");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 2963);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 3227);
+fatal_exit(1);
 }
-var_mproperty = var6;
+var_mproperty = var5;
 {
-var9 = nit___nit__SeparateCompilerVisitor___nit__abstract_compiler__AbstractCompilerVisitor__isset_attribute(var_v, var_mproperty, var_recv);
+var8 = nit___nit__SeparateCompilerVisitor___nit__abstract_compiler__AbstractCompilerVisitor__isset_attribute(var_v, var_mproperty, var_recv);
 }
-var = var9;
+var = var8;
+goto RET_LABEL;
+RET_LABEL:;
+return var;
+}
+/* method abstract_compiler#AVarargExpr#expr for (self: AVarargExpr, AbstractCompilerVisitor): nullable RuntimeVariable */
+val* nit__abstract_compiler___AVarargExpr___AExpr__expr(val* self, val* p0) {
+val* var /* : nullable RuntimeVariable */;
+val* var_v /* var v: AbstractCompilerVisitor */;
+val* var1 /* : AExpr */;
+val* var3 /* : AExpr */;
+val* var4 /* : RuntimeVariable */;
+var_v = p0;
+{
+{ /* Inline parser_nodes#AVarargExpr#n_expr (self) on <self:AVarargExpr> */
+var3 = self->attrs[COLOR_nit__parser_nodes__AVarargExpr___n_expr].val; /* _n_expr on <self:AVarargExpr> */
+if (unlikely(var3 == NULL)) {
+PRINT_ERROR("Runtime error: %s", "Uninitialized attribute _n_expr");
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__parser_nodes, 2692);
+fatal_exit(1);
+}
+var1 = var3;
+RET_LABEL2:(void)0;
+}
+}
+{
+var4 = nit___nit__AbstractCompilerVisitor___expr(var_v, var1, ((val*)NULL));
+}
+var = var4;
+goto RET_LABEL;
+RET_LABEL:;
+return var;
+}
+/* method abstract_compiler#ANamedargExpr#expr for (self: ANamedargExpr, AbstractCompilerVisitor): nullable RuntimeVariable */
+val* nit__abstract_compiler___ANamedargExpr___AExpr__expr(val* self, val* p0) {
+val* var /* : nullable RuntimeVariable */;
+val* var_v /* var v: AbstractCompilerVisitor */;
+val* var1 /* : AExpr */;
+val* var3 /* : AExpr */;
+val* var4 /* : RuntimeVariable */;
+var_v = p0;
+{
+{ /* Inline parser_nodes#ANamedargExpr#n_expr (self) on <self:ANamedargExpr> */
+var3 = self->attrs[COLOR_nit__parser_nodes__ANamedargExpr___n_expr].val; /* _n_expr on <self:ANamedargExpr> */
+if (unlikely(var3 == NULL)) {
+PRINT_ERROR("Runtime error: %s", "Uninitialized attribute _n_expr");
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__parser_nodes, 2709);
+fatal_exit(1);
+}
+var1 = var3;
+RET_LABEL2:(void)0;
+}
+}
+{
+var4 = nit___nit__AbstractCompilerVisitor___expr(var_v, var1, ((val*)NULL));
+}
+var = var4;
 goto RET_LABEL;
 RET_LABEL:;
 return var;
@@ -5435,48 +6327,48 @@ short int var14 /* : Bool */;
 val* var15 /* : nullable Object */;
 val* var_parent /* var parent: MClass */;
 val* var16 /* : Set[MProperty] */;
-val* var18 /* : Array[MClassDef] */;
-val* var20 /* : Array[MClassDef] */;
-val* var_21 /* var : Array[MClassDef] */;
-val* var22 /* : ArrayIterator[nullable Object] */;
-val* var_23 /* var : ArrayIterator[MClassDef] */;
-short int var24 /* : Bool */;
-val* var25 /* : nullable Object */;
+val* var17 /* : Array[MClassDef] */;
+val* var19 /* : Array[MClassDef] */;
+val* var_20 /* var : Array[MClassDef] */;
+val* var21 /* : ArrayIterator[nullable Object] */;
+val* var_22 /* var : ArrayIterator[MClassDef] */;
+short int var23 /* : Bool */;
+val* var24 /* : nullable Object */;
 val* var_mclassdef /* var mclassdef: MClassDef */;
-val* var26 /* : POSetElement[MModule] */;
-val* var28 /* : POSetElement[MModule] */;
-val* var29 /* : MModule */;
-val* var31 /* : MModule */;
+val* var25 /* : POSetElement[MModule] */;
+val* var27 /* : POSetElement[MModule] */;
+val* var28 /* : MModule */;
+val* var30 /* : MModule */;
+short int var31 /* : Bool */;
 short int var32 /* : Bool */;
-short int var33 /* : Bool */;
-val* var35 /* : Array[MProperty] */;
-val* var37 /* : Array[MProperty] */;
-val* var_38 /* var : Array[MProperty] */;
-val* var39 /* : ArrayIterator[nullable Object] */;
-val* var_40 /* var : ArrayIterator[MProperty] */;
-short int var41 /* : Bool */;
-val* var42 /* : nullable Object */;
+val* var34 /* : Array[MProperty] */;
+val* var36 /* : Array[MProperty] */;
+val* var_37 /* var : Array[MProperty] */;
+val* var38 /* : ArrayIterator[nullable Object] */;
+val* var_39 /* var : ArrayIterator[MProperty] */;
+short int var40 /* : Bool */;
+val* var41 /* : nullable Object */;
 val* var_mprop /* var mprop: MProperty */;
+val* var44 /* : Map[MClass, Set[MProperty]] */;
+val* var46 /* : Map[MClass, Set[MProperty]] */;
 val* var47 /* : Map[MClass, Set[MProperty]] */;
 val* var49 /* : Map[MClass, Set[MProperty]] */;
-val* var50 /* : Map[MClass, Set[MProperty]] */;
-val* var52 /* : Map[MClass, Set[MProperty]] */;
-val* var53 /* : nullable Object */;
+val* var50 /* : nullable Object */;
 var_mclass = p0;
 {
 { /* Inline abstract_compiler#MModule#properties_cache (self) on <self:MModule> */
 var3 = self->attrs[COLOR_nit__abstract_compiler__MModule___properties_cache].val; /* _properties_cache on <self:MModule> */
 if (unlikely(var3 == NULL)) {
 PRINT_ERROR("Runtime error: %s", "Uninitialized attribute _properties_cache");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 3008);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 3286);
+fatal_exit(1);
 }
 var1 = var3;
 RET_LABEL2:(void)0;
 }
 }
 {
-var4 = standard___standard__MapRead___has_key(var1, var_mclass);
+var4 = ((short int(*)(val* self, val* p0))((((long)var1&3)?class_info[((long)var1&3)]:var1->class)->vft[COLOR_standard__abstract_collection__MapRead__has_key]))(var1, var_mclass); /* has_key on <var1:Map[MClass, Set[MProperty]]>*/
 }
 var5 = !var4;
 if (var5){
@@ -5537,157 +6429,151 @@ goto BREAK_label;
 }
 BREAK_label: (void)0;
 {
-{ /* Inline abstract_collection#Iterator#finish (var_13) on <var_13:ArrayIterator[MClass]> */
-RET_LABEL17:(void)0;
-}
+standard__array___standard__array__ArrayIterator___standard__abstract_collection__Iterator__finish(var_13); /* Direct call array#ArrayIterator#finish on <var_13:ArrayIterator[MClass]>*/
 }
 {
 { /* Inline model#MClass#mclassdefs (var_mclass) on <var_mclass:MClass> */
-var20 = var_mclass->attrs[COLOR_nit__model__MClass___mclassdefs].val; /* _mclassdefs on <var_mclass:MClass> */
-if (unlikely(var20 == NULL)) {
+var19 = var_mclass->attrs[COLOR_nit__model__MClass___mclassdefs].val; /* _mclassdefs on <var_mclass:MClass> */
+if (unlikely(var19 == NULL)) {
 PRINT_ERROR("Runtime error: %s", "Uninitialized attribute _mclassdefs");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__model, 417);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__model, 454);
+fatal_exit(1);
 }
-var18 = var20;
-RET_LABEL19:(void)0;
+var17 = var19;
+RET_LABEL18:(void)0;
 }
 }
-var_21 = var18;
+var_20 = var17;
 {
-var22 = standard___standard__AbstractArrayRead___standard__abstract_collection__Collection__iterator(var_21);
+var21 = standard___standard__AbstractArrayRead___standard__abstract_collection__Collection__iterator(var_20);
 }
-var_23 = var22;
+var_22 = var21;
 for(;;) {
 {
-var24 = standard__array___standard__array__ArrayIterator___standard__abstract_collection__Iterator__is_ok(var_23);
+var23 = standard__array___standard__array__ArrayIterator___standard__abstract_collection__Iterator__is_ok(var_22);
 }
-if (var24){
+if (var23){
 {
-var25 = standard__array___standard__array__ArrayIterator___standard__abstract_collection__Iterator__item(var_23);
+var24 = standard__array___standard__array__ArrayIterator___standard__abstract_collection__Iterator__item(var_22);
 }
-var_mclassdef = var25;
+var_mclassdef = var24;
 {
 { /* Inline mmodule#MModule#in_importation (self) on <self:MModule> */
-var28 = self->attrs[COLOR_nit__mmodule__MModule___in_importation].val; /* _in_importation on <self:MModule> */
-if (unlikely(var28 == NULL)) {
+var27 = self->attrs[COLOR_nit__mmodule__MModule___in_importation].val; /* _in_importation on <self:MModule> */
+if (unlikely(var27 == NULL)) {
 PRINT_ERROR("Runtime error: %s", "Uninitialized attribute _in_importation");
 PRINT_ERROR(" (%s:%d)\n", FILE_nit__mmodule, 96);
-show_backtrace(1);
+fatal_exit(1);
 }
-var26 = var28;
-RET_LABEL27:(void)0;
+var25 = var27;
+RET_LABEL26:(void)0;
 }
 }
 {
 { /* Inline model#MClassDef#mmodule (var_mclassdef) on <var_mclassdef:MClassDef> */
-var31 = var_mclassdef->attrs[COLOR_nit__model__MClassDef___mmodule].val; /* _mmodule on <var_mclassdef:MClassDef> */
-if (unlikely(var31 == NULL)) {
+var30 = var_mclassdef->attrs[COLOR_nit__model__MClassDef___mmodule].val; /* _mmodule on <var_mclassdef:MClassDef> */
+if (unlikely(var30 == NULL)) {
 PRINT_ERROR("Runtime error: %s", "Uninitialized attribute _mmodule");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__model, 489);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__model, 550);
+fatal_exit(1);
 }
-var29 = var31;
-RET_LABEL30:(void)0;
+var28 = var30;
+RET_LABEL29:(void)0;
 }
 }
 {
-var32 = poset___poset__POSetElement____60d_61d(var26, var29);
+var31 = poset___poset__POSetElement____60d_61d(var25, var28);
 }
-var33 = !var32;
-if (var33){
-goto BREAK_label34;
+var32 = !var31;
+if (var32){
+goto BREAK_label33;
 } else {
 }
 {
 { /* Inline model#MClassDef#intro_mproperties (var_mclassdef) on <var_mclassdef:MClassDef> */
-var37 = var_mclassdef->attrs[COLOR_nit__model__MClassDef___intro_mproperties].val; /* _intro_mproperties on <var_mclassdef:MClassDef> */
-if (unlikely(var37 == NULL)) {
+var36 = var_mclassdef->attrs[COLOR_nit__model__MClassDef___intro_mproperties].val; /* _intro_mproperties on <var_mclassdef:MClassDef> */
+if (unlikely(var36 == NULL)) {
 PRINT_ERROR("Runtime error: %s", "Uninitialized attribute _intro_mproperties");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__model, 620);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__model, 681);
+fatal_exit(1);
 }
-var35 = var37;
-RET_LABEL36:(void)0;
+var34 = var36;
+RET_LABEL35:(void)0;
 }
 }
-var_38 = var35;
+var_37 = var34;
 {
-var39 = standard___standard__AbstractArrayRead___standard__abstract_collection__Collection__iterator(var_38);
+var38 = standard___standard__AbstractArrayRead___standard__abstract_collection__Collection__iterator(var_37);
 }
-var_40 = var39;
+var_39 = var38;
 for(;;) {
 {
-var41 = standard__array___standard__array__ArrayIterator___standard__abstract_collection__Iterator__is_ok(var_40);
+var40 = standard__array___standard__array__ArrayIterator___standard__abstract_collection__Iterator__is_ok(var_39);
 }
-if (var41){
+if (var40){
 {
-var42 = standard__array___standard__array__ArrayIterator___standard__abstract_collection__Iterator__item(var_40);
+var41 = standard__array___standard__array__ArrayIterator___standard__abstract_collection__Iterator__item(var_39);
 }
-var_mprop = var42;
+var_mprop = var41;
 {
 standard___standard__HashSet___standard__abstract_collection__SimpleCollection__add(var_properties, var_mprop); /* Direct call hash_collection#HashSet#add on <var_properties:HashSet[MProperty]>*/
 }
 {
-standard__array___standard__array__ArrayIterator___standard__abstract_collection__Iterator__next(var_40); /* Direct call array#ArrayIterator#next on <var_40:ArrayIterator[MProperty]>*/
+standard__array___standard__array__ArrayIterator___standard__abstract_collection__Iterator__next(var_39); /* Direct call array#ArrayIterator#next on <var_39:ArrayIterator[MProperty]>*/
 }
 } else {
-goto BREAK_label43;
+goto BREAK_label42;
 }
 }
-BREAK_label43: (void)0;
+BREAK_label42: (void)0;
 {
-{ /* Inline abstract_collection#Iterator#finish (var_40) on <var_40:ArrayIterator[MProperty]> */
-RET_LABEL44:(void)0;
-}
+standard__array___standard__array__ArrayIterator___standard__abstract_collection__Iterator__finish(var_39); /* Direct call array#ArrayIterator#finish on <var_39:ArrayIterator[MProperty]>*/
 }
-BREAK_label34: (void)0;
+BREAK_label33: (void)0;
 {
-standard__array___standard__array__ArrayIterator___standard__abstract_collection__Iterator__next(var_23); /* Direct call array#ArrayIterator#next on <var_23:ArrayIterator[MClassDef]>*/
+standard__array___standard__array__ArrayIterator___standard__abstract_collection__Iterator__next(var_22); /* Direct call array#ArrayIterator#next on <var_22:ArrayIterator[MClassDef]>*/
 }
 } else {
-goto BREAK_label45;
+goto BREAK_label43;
 }
 }
-BREAK_label45: (void)0;
+BREAK_label43: (void)0;
 {
-{ /* Inline abstract_collection#Iterator#finish (var_23) on <var_23:ArrayIterator[MClassDef]> */
-RET_LABEL46:(void)0;
-}
+standard__array___standard__array__ArrayIterator___standard__abstract_collection__Iterator__finish(var_22); /* Direct call array#ArrayIterator#finish on <var_22:ArrayIterator[MClassDef]>*/
 }
 {
 { /* Inline abstract_compiler#MModule#properties_cache (self) on <self:MModule> */
-var49 = self->attrs[COLOR_nit__abstract_compiler__MModule___properties_cache].val; /* _properties_cache on <self:MModule> */
-if (unlikely(var49 == NULL)) {
+var46 = self->attrs[COLOR_nit__abstract_compiler__MModule___properties_cache].val; /* _properties_cache on <self:MModule> */
+if (unlikely(var46 == NULL)) {
 PRINT_ERROR("Runtime error: %s", "Uninitialized attribute _properties_cache");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 3008);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 3286);
+fatal_exit(1);
 }
-var47 = var49;
-RET_LABEL48:(void)0;
+var44 = var46;
+RET_LABEL45:(void)0;
 }
 }
 {
-((void (*)(val* self, val* p0, val* p1))(var47->class->vft[COLOR_standard__abstract_collection__Map___91d_93d_61d]))(var47, var_mclass, var_properties) /* []= on <var47:Map[MClass, Set[MProperty]]>*/;
+((void(*)(val* self, val* p0, val* p1))((((long)var44&3)?class_info[((long)var44&3)]:var44->class)->vft[COLOR_standard__abstract_collection__Map___91d_93d_61d]))(var44, var_mclass, var_properties); /* []= on <var44:Map[MClass, Set[MProperty]]>*/
 }
 } else {
 }
 {
 { /* Inline abstract_compiler#MModule#properties_cache (self) on <self:MModule> */
-var52 = self->attrs[COLOR_nit__abstract_compiler__MModule___properties_cache].val; /* _properties_cache on <self:MModule> */
-if (unlikely(var52 == NULL)) {
+var49 = self->attrs[COLOR_nit__abstract_compiler__MModule___properties_cache].val; /* _properties_cache on <self:MModule> */
+if (unlikely(var49 == NULL)) {
 PRINT_ERROR("Runtime error: %s", "Uninitialized attribute _properties_cache");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 3008);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 3286);
+fatal_exit(1);
 }
-var50 = var52;
-RET_LABEL51:(void)0;
+var47 = var49;
+RET_LABEL48:(void)0;
 }
 }
 {
-var53 = ((val* (*)(val* self, val* p0))(var50->class->vft[COLOR_standard__abstract_collection__MapRead___91d_93d]))(var50, var_mclass) /* [] on <var50:Map[MClass, Set[MProperty]]>*/;
+var50 = ((val*(*)(val* self, val* p0))((((long)var47&3)?class_info[((long)var47&3)]:var47->class)->vft[COLOR_standard__abstract_collection__MapRead___91d_93d]))(var47, var_mclass); /* [] on <var47:Map[MClass, Set[MProperty]]>*/
 }
-var = var53;
+var = var50;
 goto RET_LABEL;
 RET_LABEL:;
 return var;
@@ -5699,26 +6585,10 @@ val* var1 /* : Map[MClass, Set[MProperty]] */;
 var1 = self->attrs[COLOR_nit__abstract_compiler__MModule___properties_cache].val; /* _properties_cache on <self:MModule> */
 if (unlikely(var1 == NULL)) {
 PRINT_ERROR("Runtime error: %s", "Uninitialized attribute _properties_cache");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 3008);
-show_backtrace(1);
-}
-var = var1;
-RET_LABEL:;
-return var;
-}
-/* method abstract_compiler#MModule#finalize_ffi for (self: MModule, AbstractCompiler) */
-void nit__abstract_compiler___MModule___finalize_ffi(val* self, val* p0) {
-val* var_c /* var c: AbstractCompiler */;
-var_c = p0;
-RET_LABEL:;
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 3286);
+fatal_exit(1);
 }
-/* method abstract_compiler#MModule#collect_linker_libs for (self: MModule): nullable Array[String] */
-val* nit__abstract_compiler___MModule___collect_linker_libs(val* self) {
-val* var /* : nullable Array[String] */;
-val* var1 /* : null */;
-var1 = NULL;
 var = var1;
-goto RET_LABEL;
 RET_LABEL:;
 return var;
 }
@@ -5729,312 +6599,296 @@ val* var_toolcontext /* var toolcontext: ToolContext */;
 static val* varonce;
 val* var1 /* : String */;
 char* var2 /* : NativeString */;
-long var3 /* : Int */;
-val* var4 /* : FlatString */;
-val* var6 /* : Sequence[String] */;
-val* var7 /* : Model */;
+val* var3 /* : FlatString */;
+val* var5 /* : Sequence[String] */;
+val* var6 /* : Model */;
 val* var_model /* var model: Model */;
-val* var9 /* : ModelBuilder */;
+val* var8 /* : ModelBuilder */;
 val* var_modelbuilder /* var modelbuilder: ModelBuilder */;
-val* var10 /* : OptionContext */;
-val* var12 /* : OptionContext */;
-val* var13 /* : Array[String] */;
-val* var15 /* : Array[String] */;
+val* var9 /* : OptionContext */;
+val* var11 /* : OptionContext */;
+val* var12 /* : Array[String] */;
+val* var14 /* : Array[String] */;
 val* var_arguments /* var arguments: Array[String] */;
-short int var16 /* : Bool */;
-long var17 /* : Int */;
-long var19 /* : Int */;
-long var20 /* : Int */;
+short int var15 /* : Bool */;
+long var16 /* : Int */;
+long var18 /* : Int */;
+short int var19 /* : Bool */;
 short int var21 /* : Bool */;
-short int var23 /* : Bool */;
 int cltype;
 int idtype;
 const char* var_class_name;
-short int var24 /* : Bool */;
+short int var22 /* : Bool */;
 short int var_ /* var : Bool */;
+val* var23 /* : OptionString */;
 val* var25 /* : OptionString */;
-val* var27 /* : OptionString */;
+val* var26 /* : nullable Object */;
 val* var28 /* : nullable Object */;
-val* var30 /* : nullable Object */;
-val* var31 /* : null */;
+short int var29 /* : Bool */;
+short int var30 /* : Bool */;
+val* var_other /* var other: nullable Object */;
 short int var32 /* : Bool */;
 short int var33 /* : Bool */;
-val* var_other /* var other: nullable Object */;
-short int var35 /* : Bool */;
-short int var36 /* : Bool */;
-static val* varonce37;
-val* var38 /* : String */;
-char* var39 /* : NativeString */;
-long var40 /* : Int */;
-val* var41 /* : FlatString */;
-long var42 /* : Int */;
-val* var44 /* : Array[MModule] */;
+static val* varonce34;
+val* var35 /* : String */;
+char* var36 /* : NativeString */;
+val* var37 /* : FlatString */;
+val* var39 /* : Array[MModule] */;
 val* var_mmodules /* var mmodules: Array[MModule] */;
-short int var45 /* : Bool */;
-val* var_46 /* var : Array[MModule] */;
-val* var47 /* : ArrayIterator[nullable Object] */;
-val* var_48 /* var : ArrayIterator[MModule] */;
-short int var49 /* : Bool */;
-val* var50 /* : nullable Object */;
+short int var40 /* : Bool */;
+val* var_41 /* var : Array[MModule] */;
+val* var42 /* : ArrayIterator[nullable Object] */;
+val* var_43 /* var : ArrayIterator[MModule] */;
+short int var44 /* : Bool */;
+val* var45 /* : nullable Object */;
 val* var_mmodule /* var mmodule: MModule */;
-static val* varonce51;
-val* var52 /* : String */;
-char* var53 /* : NativeString */;
-long var54 /* : Int */;
+val* var47 /* : NativeArray[String] */;
+static val* varonce46;
+static val* varonce48;
+val* var49 /* : String */;
+char* var50 /* : NativeString */;
+val* var51 /* : FlatString */;
+static val* varonce52;
+val* var53 /* : String */;
+char* var54 /* : NativeString */;
 val* var55 /* : FlatString */;
-static val* varonce56;
+val* var56 /* : String */;
 val* var57 /* : String */;
-char* var58 /* : NativeString */;
-long var59 /* : Int */;
-val* var60 /* : FlatString */;
-val* var61 /* : Array[Object] */;
-long var62 /* : Int */;
-val* var63 /* : NativeArray[Object] */;
-val* var64 /* : String */;
-long var65 /* : Int */;
-val* var66 /* : Array[MModule] */;
-long var67 /* : Int */;
-val* var_68 /* var : Array[MModule] */;
+val* var58 /* : Array[MModule] */;
+val* var_59 /* var : Array[MModule] */;
 val* var_ms /* var ms: Array[MModule] */;
 var = NEW_nit__ToolContext(&type_nit__ToolContext);
 {
 nit__separate_erasure_compiler___ToolContext___standard__kernel__Object__init(var); /* Direct call separate_erasure_compiler#ToolContext#init on <var:ToolContext>*/
 }
 var_toolcontext = var;
-if (varonce) {
+if (likely(varonce!=NULL)) {
 var1 = varonce;
 } else {
 var2 = "Usage: nitc [OPTION]... file.nit...\nCompiles Nit programs.";
-var3 = 58;
-var4 = standard___standard__NativeString___to_s_with_length(var2, var3);
-var1 = var4;
+var3 = standard___standard__NativeString___to_s_with_length(var2, 58l);
+var1 = var3;
 varonce = var1;
 }
 {
 { /* Inline toolcontext#ToolContext#tooldescription= (var_toolcontext,var1) on <var_toolcontext:ToolContext> */
 var_toolcontext->attrs[COLOR_nit__toolcontext__ToolContext___tooldescription].val = var1; /* _tooldescription on <var_toolcontext:ToolContext> */
-RET_LABEL5:(void)0;
+RET_LABEL4:(void)0;
 }
 }
 {
-var6 = standard__string___Object___args(self);
+var5 = standard__string___Sys___args(self);
 }
 {
-nit__nith___ToolContext___process_options(var_toolcontext, var6); /* Direct call nith#ToolContext#process_options on <var_toolcontext:ToolContext>*/
+nit__nith___ToolContext___process_options(var_toolcontext, var5); /* Direct call nith#ToolContext#process_options on <var_toolcontext:ToolContext>*/
 }
-var7 = NEW_nit__Model(&type_nit__Model);
+var6 = NEW_nit__Model(&type_nit__Model);
 {
-{ /* Inline kernel#Object#init (var7) on <var7:Model> */
-RET_LABEL8:(void)0;
+{ /* Inline kernel#Object#init (var6) on <var6:Model> */
+RET_LABEL7:(void)0;
 }
 }
-var_model = var7;
-var9 = NEW_nit__ModelBuilder(&type_nit__ModelBuilder);
+var_model = var6;
+var8 = NEW_nit__ModelBuilder(&type_nit__ModelBuilder);
 {
-((void (*)(val* self, val* p0))(var9->class->vft[COLOR_nit__modelbuilder_base__ModelBuilder__model_61d]))(var9, var_model) /* model= on <var9:ModelBuilder>*/;
+((void(*)(val* self, val* p0))(var8->class->vft[COLOR_nit__modelbuilder_base__ModelBuilder__model_61d]))(var8, var_model); /* model= on <var8:ModelBuilder>*/
 }
 {
-((void (*)(val* self, val* p0))(var9->class->vft[COLOR_nit__modelbuilder_base__ModelBuilder__toolcontext_61d]))(var9, var_toolcontext) /* toolcontext= on <var9:ModelBuilder>*/;
+((void(*)(val* self, val* p0))(var8->class->vft[COLOR_nit__modelbuilder_base__ModelBuilder__toolcontext_61d]))(var8, var_toolcontext); /* toolcontext= on <var8:ModelBuilder>*/
 }
 {
-((void (*)(val* self))(var9->class->vft[COLOR_standard__kernel__Object__init]))(var9) /* init on <var9:ModelBuilder>*/;
+((void(*)(val* self))(var8->class->vft[COLOR_standard__kernel__Object__init]))(var8); /* init on <var8:ModelBuilder>*/
 }
-var_modelbuilder = var9;
+var_modelbuilder = var8;
 {
 { /* Inline toolcontext#ToolContext#option_context (var_toolcontext) on <var_toolcontext:ToolContext> */
-var12 = var_toolcontext->attrs[COLOR_nit__toolcontext__ToolContext___option_context].val; /* _option_context on <var_toolcontext:ToolContext> */
-if (unlikely(var12 == NULL)) {
+var11 = var_toolcontext->attrs[COLOR_nit__toolcontext__ToolContext___option_context].val; /* _option_context on <var_toolcontext:ToolContext> */
+if (unlikely(var11 == NULL)) {
 PRINT_ERROR("Runtime error: %s", "Uninitialized attribute _option_context");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__toolcontext, 270);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__toolcontext, 332);
+fatal_exit(1);
 }
-var10 = var12;
-RET_LABEL11:(void)0;
+var9 = var11;
+RET_LABEL10:(void)0;
 }
 }
 {
-{ /* Inline opts#OptionContext#rest (var10) on <var10:OptionContext> */
-var15 = var10->attrs[COLOR_opts__OptionContext___rest].val; /* _rest on <var10:OptionContext> */
-if (unlikely(var15 == NULL)) {
+{ /* Inline opts#OptionContext#rest (var9) on <var9:OptionContext> */
+var14 = var9->attrs[COLOR_opts__OptionContext___rest].val; /* _rest on <var9:OptionContext> */
+if (unlikely(var14 == NULL)) {
 PRINT_ERROR("Runtime error: %s", "Uninitialized attribute _rest");
 PRINT_ERROR(" (%s:%d)\n", FILE_opts, 267);
-show_backtrace(1);
+fatal_exit(1);
 }
-var13 = var15;
-RET_LABEL14:(void)0;
+var12 = var14;
+RET_LABEL13:(void)0;
 }
 }
-var_arguments = var13;
+var_arguments = var12;
 {
 { /* Inline array#AbstractArrayRead#length (var_arguments) on <var_arguments:Array[String]> */
-var19 = var_arguments->attrs[COLOR_standard__array__AbstractArrayRead___length].l; /* _length on <var_arguments:Array[String]> */
-var17 = var19;
-RET_LABEL18:(void)0;
+var18 = var_arguments->attrs[COLOR_standard__array__AbstractArrayRead___length].l; /* _length on <var_arguments:Array[String]> */
+var16 = var18;
+RET_LABEL17:(void)0;
 }
 }
-var20 = 1;
 {
-{ /* Inline kernel#Int#> (var17,var20) on <var17:Int> */
-/* Covariant cast for argument 0 (i) <var20:Int> isa OTHER */
-/* <var20:Int> isa OTHER */
-var23 = 1; /* easy <var20:Int> isa OTHER*/
-if (unlikely(!var23)) {
+{ /* Inline kernel#Int#> (var16,1l) on <var16:Int> */
+/* Covariant cast for argument 0 (i) <1l:Int> isa OTHER */
+/* <1l:Int> isa OTHER */
+var21 = 1; /* easy <1l:Int> isa OTHER*/
+if (unlikely(!var21)) {
 var_class_name = type_standard__Int.name;
 PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name);
-PRINT_ERROR(" (%s:%d)\n", FILE_standard__kernel, 412);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_standard__kernel, 536);
+fatal_exit(1);
 }
-var24 = var17 > var20;
-var21 = var24;
-goto RET_LABEL22;
-RET_LABEL22:(void)0;
+var22 = var16 > 1l;
+var19 = var22;
+goto RET_LABEL20;
+RET_LABEL20:(void)0;
 }
 }
-var_ = var21;
-if (var21){
+var_ = var19;
+if (var19){
 {
 { /* Inline abstract_compiler#ToolContext#opt_output (var_toolcontext) on <var_toolcontext:ToolContext> */
-var27 = var_toolcontext->attrs[COLOR_nit__abstract_compiler__ToolContext___opt_output].val; /* _opt_output on <var_toolcontext:ToolContext> */
-if (unlikely(var27 == NULL)) {
+var25 = var_toolcontext->attrs[COLOR_nit__abstract_compiler__ToolContext___opt_output].val; /* _opt_output on <var_toolcontext:ToolContext> */
+if (unlikely(var25 == NULL)) {
 PRINT_ERROR("Runtime error: %s", "Uninitialized attribute _opt_output");
-PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 29);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_nit__abstract_compiler, 30);
+fatal_exit(1);
 }
-var25 = var27;
-RET_LABEL26:(void)0;
+var23 = var25;
+RET_LABEL24:(void)0;
 }
 }
 {
-{ /* Inline opts#Option#value (var25) on <var25:OptionString> */
-var30 = var25->attrs[COLOR_opts__Option___value].val; /* _value on <var25:OptionString> */
-var28 = var30;
-RET_LABEL29:(void)0;
+{ /* Inline opts#Option#value (var23) on <var23:OptionString> */
+var28 = var23->attrs[COLOR_opts__Option___value].val; /* _value on <var23:OptionString> */
+var26 = var28;
+RET_LABEL27:(void)0;
 }
 }
-var31 = NULL;
-if (var28 == NULL) {
-var32 = 0; /* is null */
+if (var26 == NULL) {
+var29 = 0; /* is null */
 } else {
-var32 = 1; /* arg is null and recv is not */
+var29 = 1; /* arg is null and recv is not */
 }
 if (0) {
-{ /* Inline kernel#Object#!= (var28,var31) on <var28:nullable Object(nullable String)> */
-var_other = var31;
+{ /* Inline kernel#Object#!= (var26,((val*)NULL)) on <var26:nullable Object(nullable String)> */
+var_other = ((val*)NULL);
 {
-var35 = ((short int (*)(val* self, val* p0))(var28->class->vft[COLOR_standard__kernel__Object___61d_61d]))(var28, var_other) /* == on <var28:nullable String(String)>*/;
+var32 = ((short int(*)(val* self, val* p0))(var26->class->vft[COLOR_standard__kernel__Object___61d_61d]))(var26, var_other); /* == on <var26:nullable String(String)>*/
 }
-var36 = !var35;
-var33 = var36;
-goto RET_LABEL34;
-RET_LABEL34:(void)0;
+var33 = !var32;
+var30 = var33;
+goto RET_LABEL31;
+RET_LABEL31:(void)0;
 }
-var32 = var33;
+var29 = var30;
 }
-var16 = var32;
+var15 = var29;
 } else {
-var16 = var_;
+var15 = var_;
 }
-if (var16){
-if (varonce37) {
-var38 = varonce37;
+if (var15){
+if (likely(varonce34!=NULL)) {
+var35 = varonce34;
 } else {
-var39 = "Error: --output needs a single source file. Do you prefer --dir?";
-var40 = 64;
-var41 = standard___standard__NativeString___to_s_with_length(var39, var40);
-var38 = var41;
-varonce37 = var38;
+var36 = "Option Error: --output needs a single source file. Do you prefer --dir?";
+var37 = standard___standard__NativeString___to_s_with_length(var36, 71l);
+var35 = var37;
+varonce34 = var35;
 }
 {
-standard__file___Object___print(self, var38); /* Direct call file#Object#print on <self:Sys>*/
+standard__file___Sys___print(self, var35); /* Direct call file#Sys#print on <self:Sys>*/
 }
-var42 = 1;
 {
-{ /* Inline kernel#Object#exit (self,var42) on <self:Sys> */
-exit(var42);
-RET_LABEL43:(void)0;
+{ /* Inline kernel#Sys#exit (self,1l) on <self:Sys> */
+exit(1l);
+RET_LABEL38:(void)0;
 }
 }
 } else {
 }
 {
-var44 = nit__loader___ModelBuilder___parse(var_modelbuilder, var_arguments);
+var39 = nit__loader___ModelBuilder___parse(var_modelbuilder, var_arguments);
 }
-var_mmodules = var44;
+var_mmodules = var39;
 {
-var45 = standard___standard__AbstractArrayRead___standard__abstract_collection__Collection__is_empty(var_mmodules);
+var40 = standard___standard__AbstractArrayRead___standard__abstract_collection__Collection__is_empty(var_mmodules);
 }
-if (var45){
+if (var40){
 goto RET_LABEL;
 } else {
 }
 {
 nit__modelbuilder___ModelBuilder___run_phases(var_modelbuilder); /* Direct call modelbuilder#ModelBuilder#run_phases on <var_modelbuilder:ModelBuilder>*/
 }
-var_46 = var_mmodules;
+var_41 = var_mmodules;
 {
-var47 = standard___standard__AbstractArrayRead___standard__abstract_collection__Collection__iterator(var_46);
+var42 = standard___standard__AbstractArrayRead___standard__abstract_collection__Collection__iterator(var_41);
 }
-var_48 = var47;
+var_43 = var42;
 for(;;) {
 {
-var49 = standard__array___standard__array__ArrayIterator___standard__abstract_collection__Iterator__is_ok(var_48);
+var44 = standard__array___standard__array__ArrayIterator___standard__abstract_collection__Iterator__is_ok(var_43);
 }
-if (var49){
+if (var44){
 {
-var50 = standard__array___standard__array__ArrayIterator___standard__abstract_collection__Iterator__item(var_48);
+var45 = standard__array___standard__array__ArrayIterator___standard__abstract_collection__Iterator__item(var_43);
 }
-var_mmodule = var50;
-if (varonce51) {
-var52 = varonce51;
+var_mmodule = var45;
+if (unlikely(varonce46==NULL)) {
+var47 = NEW_standard__NativeArray(3l, &type_standard__NativeArray__standard__String);
+if (likely(varonce48!=NULL)) {
+var49 = varonce48;
 } else {
-var53 = "*** PROCESS ";
-var54 = 12;
-var55 = standard___standard__NativeString___to_s_with_length(var53, var54);
-var52 = var55;
-varonce51 = var52;
+var50 = "*** PROCESS ";
+var51 = standard___standard__NativeString___to_s_with_length(var50, 12l);
+var49 = var51;
+varonce48 = var49;
 }
-if (varonce56) {
-var57 = varonce56;
+((struct instance_standard__NativeArray*)var47)->values[0]=var49;
+if (likely(varonce52!=NULL)) {
+var53 = varonce52;
 } else {
-var58 = " ***";
-var59 = 4;
-var60 = standard___standard__NativeString___to_s_with_length(var58, var59);
-var57 = var60;
-varonce56 = var57;
+var54 = " ***";
+var55 = standard___standard__NativeString___to_s_with_length(var54, 4l);
+var53 = var55;
+varonce52 = var53;
 }
-var61 = NEW_standard__Array(&type_standard__Array__standard__Object);
-{ /* var61 = array_instance Array[Object] */
-var62 = 3;
-var63 = NEW_standard__NativeArray(var62, &type_standard__NativeArray__standard__Object);
-((struct instance_standard__NativeArray*)var63)->values[0] = (val*) var52;
-((struct instance_standard__NativeArray*)var63)->values[1] = (val*) var_mmodule;
-((struct instance_standard__NativeArray*)var63)->values[2] = (val*) var57;
-{
-((void (*)(val* self, val* p0, long p1))(var61->class->vft[COLOR_standard__array__Array__with_native]))(var61, var63, var62) /* with_native on <var61:Array[Object]>*/;
+((struct instance_standard__NativeArray*)var47)->values[2]=var53;
+} else {
+var47 = varonce46;
+varonce46 = NULL;
 }
+{
+var56 = ((val*(*)(val* self))(var_mmodule->class->vft[COLOR_standard__string__Object__to_s]))(var_mmodule); /* to_s on <var_mmodule:MModule>*/
 }
+((struct instance_standard__NativeArray*)var47)->values[1]=var56;
 {
-var64 = ((val* (*)(val* self))(var61->class->vft[COLOR_standard__string__Object__to_s]))(var61) /* to_s on <var61:Array[Object]>*/;
+var57 = ((val*(*)(val* self))(var47->class->vft[COLOR_standard__string__NativeArray__native_to_s]))(var47); /* native_to_s on <var47:NativeArray[String]>*/
 }
-var65 = 1;
+varonce46 = var47;
 {
-nit___nit__ToolContext___info(var_toolcontext, var64, var65); /* Direct call toolcontext#ToolContext#info on <var_toolcontext:ToolContext>*/
+nit___nit__ToolContext___info(var_toolcontext, var57, 1l); /* Direct call toolcontext#ToolContext#info on <var_toolcontext:ToolContext>*/
 }
-var66 = NEW_standard__Array(&type_standard__Array__nit__MModule);
-var67 = 1;
+var58 = NEW_standard__Array(&type_standard__Array__nit__MModule);
 {
-standard___standard__Array___with_capacity(var66, var67); /* Direct call array#Array#with_capacity on <var66:Array[MModule]>*/
+standard___standard__Array___with_capacity(var58, 1l); /* Direct call array#Array#with_capacity on <var58:Array[MModule]>*/
 }
-var_68 = var66;
+var_59 = var58;
 {
-standard___standard__AbstractArray___standard__abstract_collection__Sequence__push(var_68, var_mmodule); /* Direct call array#AbstractArray#push on <var_68:Array[MModule]>*/
+standard___standard__AbstractArray___standard__abstract_collection__Sequence__push(var_59, var_mmodule); /* Direct call array#AbstractArray#push on <var_59:Array[MModule]>*/
 }
-var_ms = var_68;
+var_ms = var_59;
 {
 nit__modelbuilder___ToolContext___run_global_phases(var_toolcontext, var_ms); /* Direct call modelbuilder#ToolContext#run_global_phases on <var_toolcontext:ToolContext>*/
 }
 {
-standard__array___standard__array__ArrayIterator___standard__abstract_collection__Iterator__next(var_48); /* Direct call array#ArrayIterator#next on <var_48:ArrayIterator[MModule]>*/
+standard__array___standard__array__ArrayIterator___standard__abstract_collection__Iterator__next(var_43); /* Direct call array#ArrayIterator#next on <var_43:ArrayIterator[MModule]>*/
 }
 } else {
 goto BREAK_label;
@@ -6042,9 +6896,7 @@ goto BREAK_label;
 }
 BREAK_label: (void)0;
 {
-{ /* Inline abstract_collection#Iterator#finish (var_48) on <var_48:ArrayIterator[MModule]> */
-RET_LABEL69:(void)0;
-}
+standard__array___standard__array__ArrayIterator___standard__abstract_collection__Iterator__finish(var_43); /* Direct call array#ArrayIterator#finish on <var_43:ArrayIterator[MModule]>*/
 }
 RET_LABEL:;
 }