X-Git-Url: http://nitlanguage.org

diff --git a/c_src/more_collections.sep.1.c b/c_src/more_collections.sep.1.c
index 4cf7fbe..d8dc958 100644
--- a/c_src/more_collections.sep.1.c
+++ b/c_src/more_collections.sep.1.c
@@ -1,44 +1,60 @@
 #include "more_collections.sep.0.h"
-/* method more_collections#MultiHashMap#add_one for (self: MultiHashMap[Object, nullable Object], Object, nullable Object) */
-void more_collections__MultiHashMap__add_one(val* self, val* p0, val* p1) {
+/* method more_collections#MultiHashMap#add_one for (self: MultiHashMap[nullable Object, nullable Object], nullable Object, nullable Object) */
+void more_collections___more_collections__MultiHashMap___add_one(val* self, val* p0, val* p1) {
 short int var /* : Bool */;
 int cltype;
 int idtype;
 const struct type* type_struct;
+short int is_nullable;
+const char* var_class_name;
 short int var1 /* : Bool */;
 int cltype2;
 int idtype3;
 const struct type* type_struct4;
-short int is_nullable;
-val* var_k /* var k: Object */;
+short int is_nullable5;
+const char* var_class_name6;
+val* var_k /* var k: nullable Object */;
 val* var_v /* var v: nullable Object */;
-short int var5 /* : Bool */;
-val* var6 /* : nullable Object */;
-val* var7 /* : Array[nullable Object] */;
-long var8 /* : Int */;
-val* var9 /* : NativeArray[nullable Object] */;
-/* Covariant cast for argument 0 (k) <p0:Object> isa MultiHashMap#0 */
-/* <p0:Object> isa MultiHashMap#0 */
-type_struct = self->type->resolution_table->types[COLOR_more_collections__MultiHashMap_FT0];
+val* var7 /* : nullable Object */;
+val* var_x /* var x: nullable Array[nullable Object] */;
+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[nullable Object] */;
+long var15 /* : Int */;
+val* var_ /* var : Array[nullable Object] */;
+/* Covariant cast for argument 0 (k) <p0:nullable Object> isa K */
+/* <p0:nullable Object> isa K */
+type_struct = self->type->resolution_table->types[COLOR_more_collections__MultiHashMap___35dK];
 cltype = type_struct->color;
 idtype = type_struct->id;
+is_nullable = type_struct->is_nullable;
+if(p0 == NULL) {
+var = is_nullable;
+} else {
 if(cltype >= p0->type->table_size) {
 var = 0;
 } else {
 var = p0->type->type_table[cltype] == idtype;
 }
-if (!var) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Cast failed", "lib/more_collections.nit", 22);
-exit(1);
 }
-/* Covariant cast for argument 1 (v) <p1:nullable Object> isa MultiHashMap#1 */
-/* <p1:nullable Object> isa MultiHashMap#1 */
-type_struct4 = self->type->resolution_table->types[COLOR_more_collections__MultiHashMap_FT1];
+if (unlikely(!var)) {
+var_class_name = p0 == NULL ? "null" : p0->type->name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "K", var_class_name);
+PRINT_ERROR(" (%s:%d)\n", FILE_more_collections, 35);
+show_backtrace(1);
+}
+/* Covariant cast for argument 1 (v) <p1:nullable Object> isa V */
+/* <p1:nullable Object> isa V */
+type_struct4 = self->type->resolution_table->types[COLOR_more_collections__MultiHashMap___35dV];
 cltype2 = type_struct4->color;
 idtype3 = type_struct4->id;
-is_nullable = type_struct4->is_nullable;
+is_nullable5 = type_struct4->is_nullable;
 if(p1 == NULL) {
-var1 = is_nullable;
+var1 = is_nullable5;
 } else {
 if(cltype2 >= p1->type->table_size) {
 var1 = 0;
@@ -46,560 +62,759 @@ var1 = 0;
 var1 = p1->type->type_table[cltype2] == idtype3;
 }
 }
-if (!var1) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Cast failed", "lib/more_collections.nit", 22);
-exit(1);
+if (unlikely(!var1)) {
+var_class_name6 = p1 == NULL ? "null" : p1->type->name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "V", var_class_name6);
+PRINT_ERROR(" (%s:%d)\n", FILE_more_collections, 35);
+show_backtrace(1);
 }
 var_k = p0;
 var_v = p1;
-var5 = ((short int (*)(val*, val*))(self->class->vft[COLOR_abstract_collection__MapRead__has_key]))(self, var_k) /* has_key on <self:MultiHashMap[Object, nullable Object]>*/;
-if (var5){
-var6 = ((val* (*)(val*, val*))(self->class->vft[COLOR_abstract_collection__MapRead___91d_93d]))(self, var_k) /* [] on <self:MultiHashMap[Object, nullable Object]>*/;
-((void (*)(val*, val*))(var6->class->vft[COLOR_abstract_collection__SimpleCollection__add]))(var6, var_v) /* add on <var6:nullable Object(Array[nullable Object])>*/;
+{
+var7 = standard___standard__HashMap___standard__abstract_collection__MapRead__get_or_null(self, var_k);
+}
+var_x = var7;
+var8 = NULL;
+if (var_x == NULL) {
+var9 = 0; /* is null */
 } else {
-var7 = NEW_array__Array(self->type->resolution_table->types[COLOR_array__Arraymore_collections__MultiHashMap_FT1]);
-{ /* var7 = array_instance Array[MultiHashMap#1] */
-var8 = 1;
-var9 = NEW_array__NativeArray(var8, self->type->resolution_table->types[COLOR_array__NativeArraymore_collections__MultiHashMap_FT1]);
-((struct instance_array__NativeArray*)var9)->values[0] = (val*) var_v;
-((void (*)(val*, val*, long))(var7->class->vft[COLOR_array__Array__with_native]))(var7, var9, var8) /* with_native on <var7:Array[nullable Object]>*/;
-CHECK_NEW_array__Array(var7);
+var9 = 1; /* arg is null and recv is not */
 }
-((void (*)(val*, val*, val*))(self->class->vft[COLOR_abstract_collection__Map___91d_93d_61d]))(self, var_k, var7) /* []= on <self:MultiHashMap[Object, nullable Object]>*/;
+if (0) {
+{ /* Inline kernel#Object#!= (var_x,var8) on <var_x:nullable Array[nullable Object]> */
+var_other = var8;
+{
+var12 = ((short int (*)(val* self, val* p0))(var_x->class->vft[COLOR_standard__kernel__Object___61d_61d]))(var_x, var_other) /* == on <var_x:nullable Array[nullable Object](Array[nullable Object])>*/;
 }
-RET_LABEL:;
+var13 = !var12;
+var10 = var13;
+goto RET_LABEL11;
+RET_LABEL11:(void)0;
 }
-/* method more_collections#MultiHashMap#add_one for (self: Object, Object, nullable Object) */
-void VIRTUAL_more_collections__MultiHashMap__add_one(val* self, val* p0, val* p1) {
-more_collections__MultiHashMap__add_one(self, p0, p1);
-RET_LABEL:;
+var9 = var10;
 }
-/* method more_collections#MultiHashMap#init for (self: MultiHashMap[Object, nullable Object]) */
-void more_collections__MultiHashMap__init(val* self) {
-((void (*)(val*))(self->class->vft[COLOR_hash_collection__HashMap__init]))(self) /* init on <self:MultiHashMap[Object, nullable Object]>*/;
-RET_LABEL:;
+if (var9){
+{
+standard___standard__Array___standard__abstract_collection__SimpleCollection__add(var_x, var_v); /* Direct call array#Array#add on <var_x:nullable Array[nullable Object](Array[nullable Object])>*/
 }
-/* method more_collections#MultiHashMap#init for (self: Object) */
-void VIRTUAL_more_collections__MultiHashMap__init(val* self) {
-more_collections__MultiHashMap__init(self);
-RET_LABEL:;
+} else {
+var14 = NEW_standard__Array(self->type->resolution_table->types[COLOR_standard__Array__more_collections__MultiHashMap___35dV]);
+var15 = 1;
+{
+standard___standard__Array___with_capacity(var14, var15); /* Direct call array#Array#with_capacity on <var14:Array[nullable Object]>*/
 }
-/* method more_collections#HashMap2#level1 for (self: HashMap2[Object, Object, nullable Object]): HashMap[Object, HashMap[Object, nullable Object]] */
-val* more_collections__HashMap2__level1(val* self) {
-val* var /* : HashMap[Object, HashMap[Object, nullable Object]] */;
-val* var1 /* : HashMap[Object, HashMap[Object, nullable Object]] */;
-var1 = self->attrs[COLOR_more_collections__HashMap2___64dlevel1].val; /* @level1 on <self:HashMap2[Object, Object, nullable Object]> */
-if (var1 == NULL) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Uninitialized attribute @level1", "lib/more_collections.nit", 38);
-exit(1);
+var_ = var14;
+{
+standard___standard__AbstractArray___standard__abstract_collection__Sequence__push(var_, var_v); /* Direct call array#AbstractArray#push on <var_:Array[nullable Object]>*/
+}
+{
+standard___standard__HashMap___standard__abstract_collection__Map___91d_93d_61d(self, var_k, var_); /* Direct call hash_collection#HashMap#[]= on <self:MultiHashMap[nullable Object, nullable Object]>*/
 }
-var = var1;
-RET_LABEL:;
-return var;
 }
-/* method more_collections#HashMap2#level1 for (self: Object): HashMap[Object, HashMap[Object, nullable Object]] */
-val* VIRTUAL_more_collections__HashMap2__level1(val* self) {
-val* var /* : HashMap[Object, HashMap[Object, nullable Object]] */;
-val* var1 /* : HashMap[Object, HashMap[Object, nullable Object]] */;
-var1 = more_collections__HashMap2__level1(self);
-var = var1;
 RET_LABEL:;
-return var;
 }
-/* method more_collections#HashMap2#level1= for (self: HashMap2[Object, Object, nullable Object], HashMap[Object, HashMap[Object, nullable Object]]) */
-void more_collections__HashMap2__level1_61d(val* self, val* p0) {
-short int var /* : Bool */;
+/* method more_collections#MultiHashMap#provide_default_value for (self: MultiHashMap[nullable Object, nullable Object], nullable Object): Array[nullable Object] */
+val* more_collections___more_collections__MultiHashMap___standard__abstract_collection__MapRead__provide_default_value(val* self, val* p0) {
+val* var /* : Array[nullable Object] */;
+short int var1 /* : Bool */;
 int cltype;
 int idtype;
 const struct type* type_struct;
-/* Covariant cast for argument 0 (level1) <p0:HashMap[Object, HashMap[Object, nullable Object]]> isa HashMap[HashMap2#0, HashMap[HashMap2#1, HashMap2#2]] */
-/* <p0:HashMap[Object, HashMap[Object, nullable Object]]> isa HashMap[HashMap2#0, HashMap[HashMap2#1, HashMap2#2]] */
-type_struct = self->type->resolution_table->types[COLOR_hash_collection__HashMapmore_collections__HashMap2_FT0hash_collection__HashMapmore_collections__HashMap2_FT1more_collections__HashMap2_FT2];
+short int is_nullable;
+const char* var_class_name;
+val* var_key /* var key: nullable Object */;
+val* var2 /* : Array[nullable Object] */;
+val* var_res /* var res: Array[nullable Object] */;
+/* Covariant cast for argument 0 (key) <p0:nullable Object> isa K */
+/* <p0:nullable Object> isa K */
+type_struct = self->type->resolution_table->types[COLOR_more_collections__MultiHashMap___35dK];
 cltype = type_struct->color;
 idtype = type_struct->id;
+is_nullable = type_struct->is_nullable;
+if(p0 == NULL) {
+var1 = is_nullable;
+} else {
 if(cltype >= p0->type->table_size) {
-var = 0;
+var1 = 0;
 } else {
-var = p0->type->type_table[cltype] == idtype;
+var1 = p0->type->type_table[cltype] == idtype;
+}
 }
-if (!var) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Cast failed", "lib/more_collections.nit", 38);
-exit(1);
+if (unlikely(!var1)) {
+var_class_name = p0 == NULL ? "null" : p0->type->name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "K", var_class_name);
+PRINT_ERROR(" (%s:%d)\n", FILE_more_collections, 47);
+show_backtrace(1);
 }
-self->attrs[COLOR_more_collections__HashMap2___64dlevel1].val = p0; /* @level1 on <self:HashMap2[Object, Object, nullable Object]> */
+var_key = p0;
+var2 = NEW_standard__Array(self->type->resolution_table->types[COLOR_standard__Array__more_collections__MultiHashMap___35dV]);
+{
+standard___standard__Array___standard__kernel__Object__init(var2); /* Direct call array#Array#init on <var2:Array[nullable Object]>*/
+}
+var_res = var2;
+{
+standard___standard__HashMap___standard__abstract_collection__Map___91d_93d_61d(self, var_key, var_res); /* Direct call hash_collection#HashMap#[]= on <self:MultiHashMap[nullable Object, nullable Object]>*/
+}
+var = var_res;
+goto RET_LABEL;
 RET_LABEL:;
+return var;
+}
+/* method more_collections#HashMap2#level1 for (self: HashMap2[nullable Object, nullable Object, nullable Object]): HashMap[nullable Object, HashMap[nullable Object, nullable Object]] */
+val* more_collections___more_collections__HashMap2___level1(val* self) {
+val* var /* : HashMap[nullable Object, HashMap[nullable Object, nullable Object]] */;
+val* var1 /* : HashMap[nullable Object, HashMap[nullable Object, nullable Object]] */;
+var1 = self->attrs[COLOR_more_collections__HashMap2___level1].val; /* _level1 on <self:HashMap2[nullable Object, nullable Object, nullable Object]> */
+if (unlikely(var1 == NULL)) {
+PRINT_ERROR("Runtime error: %s", "Uninitialized attribute _level1");
+PRINT_ERROR(" (%s:%d)\n", FILE_more_collections, 64);
+show_backtrace(1);
 }
-/* method more_collections#HashMap2#level1= for (self: Object, HashMap[Object, HashMap[Object, nullable Object]]) */
-void VIRTUAL_more_collections__HashMap2__level1_61d(val* self, val* p0) {
-more_collections__HashMap2__level1_61d(self, p0);
+var = var1;
 RET_LABEL:;
+return var;
 }
-/* method more_collections#HashMap2#[] for (self: HashMap2[Object, Object, nullable Object], Object, Object): nullable Object */
-val* more_collections__HashMap2___91d_93d(val* self, val* p0, val* p1) {
+/* method more_collections#HashMap2#[] for (self: HashMap2[nullable Object, nullable Object, nullable Object], nullable Object, nullable Object): nullable Object */
+val* more_collections___more_collections__HashMap2____91d_93d(val* self, val* p0, val* p1) {
 val* var /* : nullable Object */;
 short int var1 /* : Bool */;
 int cltype;
 int idtype;
 const struct type* type_struct;
+short int is_nullable;
+const char* var_class_name;
 short int var2 /* : Bool */;
 int cltype3;
 int idtype4;
 const struct type* type_struct5;
-val* var_k1 /* var k1: Object */;
-val* var_k2 /* var k2: Object */;
-val* var6 /* : HashMap[Object, HashMap[Object, nullable Object]] */;
-val* var_level1 /* var level1: HashMap[Object, HashMap[Object, nullable Object]] */;
-short int var7 /* : Bool */;
-short int var8 /* : Bool */;
-val* var9 /* : null */;
-val* var10 /* : nullable Object */;
-val* var_level2 /* var level2: HashMap[Object, nullable Object] */;
-short int var11 /* : Bool */;
-short int var12 /* : Bool */;
-val* var13 /* : null */;
-val* var14 /* : nullable Object */;
-/* Covariant cast for argument 0 (k1) <p0:Object> isa HashMap2#0 */
-/* <p0:Object> isa HashMap2#0 */
-type_struct = self->type->resolution_table->types[COLOR_more_collections__HashMap2_FT0];
+short int is_nullable6;
+const char* var_class_name7;
+val* var_k1 /* var k1: nullable Object */;
+val* var_k2 /* var k2: nullable Object */;
+val* var8 /* : HashMap[nullable Object, HashMap[nullable Object, nullable Object]] */;
+val* var10 /* : HashMap[nullable Object, HashMap[nullable Object, nullable Object]] */;
+val* var_level1 /* var level1: HashMap[nullable Object, HashMap[nullable Object, nullable Object]] */;
+val* var11 /* : nullable Object */;
+val* var_level2 /* var level2: nullable HashMap[nullable Object, nullable Object] */;
+val* var12 /* : null */;
+short int var13 /* : Bool */;
+short int var14 /* : Bool */;
+val* var_other /* var other: nullable Object */;
+short int var16 /* : Bool */;
+short int var18 /* : Bool */;
+val* var19 /* : null */;
+val* var20 /* : nullable Object */;
+/* Covariant cast for argument 0 (k1) <p0:nullable Object> isa K1 */
+/* <p0:nullable Object> isa K1 */
+type_struct = self->type->resolution_table->types[COLOR_more_collections__HashMap2___35dK1];
 cltype = type_struct->color;
 idtype = type_struct->id;
+is_nullable = type_struct->is_nullable;
+if(p0 == NULL) {
+var1 = is_nullable;
+} else {
 if(cltype >= p0->type->table_size) {
 var1 = 0;
 } else {
 var1 = p0->type->type_table[cltype] == idtype;
 }
-if (!var1) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Cast failed", "lib/more_collections.nit", 40);
-exit(1);
 }
-/* Covariant cast for argument 1 (k2) <p1:Object> isa HashMap2#1 */
-/* <p1:Object> isa HashMap2#1 */
-type_struct5 = self->type->resolution_table->types[COLOR_more_collections__HashMap2_FT1];
+if (unlikely(!var1)) {
+var_class_name = p0 == NULL ? "null" : p0->type->name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "K1", var_class_name);
+PRINT_ERROR(" (%s:%d)\n", FILE_more_collections, 66);
+show_backtrace(1);
+}
+/* Covariant cast for argument 1 (k2) <p1:nullable Object> isa K2 */
+/* <p1:nullable Object> isa K2 */
+type_struct5 = self->type->resolution_table->types[COLOR_more_collections__HashMap2___35dK2];
 cltype3 = type_struct5->color;
 idtype4 = type_struct5->id;
+is_nullable6 = type_struct5->is_nullable;
+if(p1 == NULL) {
+var2 = is_nullable6;
+} else {
 if(cltype3 >= p1->type->table_size) {
 var2 = 0;
 } else {
 var2 = p1->type->type_table[cltype3] == idtype4;
 }
-if (!var2) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Cast failed", "lib/more_collections.nit", 40);
-exit(1);
+}
+if (unlikely(!var2)) {
+var_class_name7 = p1 == NULL ? "null" : p1->type->name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "K2", var_class_name7);
+PRINT_ERROR(" (%s:%d)\n", FILE_more_collections, 66);
+show_backtrace(1);
 }
 var_k1 = p0;
 var_k2 = p1;
-var6 = ((val* (*)(val*))(self->class->vft[COLOR_more_collections__HashMap2__level1]))(self) /* level1 on <self:HashMap2[Object, Object, nullable Object]>*/;
-var_level1 = var6;
-var7 = ((short int (*)(val*, val*))(var_level1->class->vft[COLOR_abstract_collection__MapRead__has_key]))(var_level1, var_k1) /* has_key on <var_level1:HashMap[Object, HashMap[Object, nullable Object]]>*/;
-var8 = !var7;
-if (var8){
-var9 = NULL;
-var = var9;
-goto RET_LABEL;
+{
+{ /* Inline more_collections#HashMap2#level1 (self) on <self:HashMap2[nullable Object, nullable Object, nullable Object]> */
+var10 = self->attrs[COLOR_more_collections__HashMap2___level1].val; /* _level1 on <self:HashMap2[nullable Object, nullable Object, nullable Object]> */
+if (unlikely(var10 == NULL)) {
+PRINT_ERROR("Runtime error: %s", "Uninitialized attribute _level1");
+PRINT_ERROR(" (%s:%d)\n", FILE_more_collections, 64);
+show_backtrace(1);
+}
+var8 = var10;
+RET_LABEL9:(void)0;
+}
+}
+var_level1 = var8;
+{
+var11 = standard___standard__HashMap___standard__abstract_collection__MapRead__get_or_null(var_level1, var_k1);
+}
+var_level2 = var11;
+var12 = NULL;
+if (var_level2 == NULL) {
+var13 = 1; /* is null */
 } else {
+var13 = 0; /* arg is null but recv is not */
+}
+if (0) {
+{ /* Inline kernel#Object#== (var_level2,var12) on <var_level2:nullable HashMap[nullable Object, nullable Object]> */
+var_other = var12;
+{
+{ /* Inline kernel#Object#is_same_instance (var_level2,var_other) on <var_level2:nullable HashMap[nullable Object, nullable Object](HashMap[nullable Object, nullable Object])> */
+var18 = var_level2 == var_other;
+var16 = var18;
+goto RET_LABEL17;
+RET_LABEL17:(void)0;
 }
-var10 = ((val* (*)(val*, val*))(var_level1->class->vft[COLOR_abstract_collection__MapRead___91d_93d]))(var_level1, var_k1) /* [] on <var_level1:HashMap[Object, HashMap[Object, nullable Object]]>*/;
-var_level2 = var10;
-var11 = ((short int (*)(val*, val*))(var_level2->class->vft[COLOR_abstract_collection__MapRead__has_key]))(var_level2, var_k2) /* has_key on <var_level2:HashMap[Object, nullable Object]>*/;
-var12 = !var11;
-if (var12){
-var13 = NULL;
-var = var13;
+}
+var14 = var16;
+goto RET_LABEL15;
+RET_LABEL15:(void)0;
+}
+var13 = var14;
+}
+if (var13){
+var19 = NULL;
+var = var19;
 goto RET_LABEL;
 } else {
 }
-var14 = ((val* (*)(val*, val*))(var_level2->class->vft[COLOR_abstract_collection__MapRead___91d_93d]))(var_level2, var_k2) /* [] on <var_level2:HashMap[Object, nullable Object]>*/;
-var = var14;
-goto RET_LABEL;
-RET_LABEL:;
-return var;
+{
+var20 = standard___standard__HashMap___standard__abstract_collection__MapRead__get_or_null(var_level2, var_k2);
 }
-/* method more_collections#HashMap2#[] for (self: Object, Object, Object): nullable Object */
-val* VIRTUAL_more_collections__HashMap2___91d_93d(val* self, val* p0, val* p1) {
-val* var /* : nullable Object */;
-val* var1 /* : nullable Object */;
-var1 = more_collections__HashMap2___91d_93d(self, p0, p1);
-var = var1;
+var = var20;
+goto RET_LABEL;
 RET_LABEL:;
 return var;
 }
-/* method more_collections#HashMap2#[]= for (self: HashMap2[Object, Object, nullable Object], Object, Object, nullable Object) */
-void more_collections__HashMap2___91d_93d_61d(val* self, val* p0, val* p1, val* p2) {
+/* method more_collections#HashMap2#[]= for (self: HashMap2[nullable Object, nullable Object, nullable Object], nullable Object, nullable Object, nullable Object) */
+void more_collections___more_collections__HashMap2____91d_93d_61d(val* self, val* p0, val* p1, val* p2) {
 short int var /* : Bool */;
 int cltype;
 int idtype;
 const struct type* type_struct;
+short int is_nullable;
+const char* var_class_name;
 short int var1 /* : Bool */;
 int cltype2;
 int idtype3;
 const struct type* type_struct4;
-short int var5 /* : Bool */;
-int cltype6;
-int idtype7;
-const struct type* type_struct8;
-short int is_nullable;
-val* var_k1 /* var k1: Object */;
-val* var_k2 /* var k2: Object */;
+short int is_nullable5;
+const char* var_class_name6;
+short int var7 /* : Bool */;
+int cltype8;
+int idtype9;
+const struct type* type_struct10;
+short int is_nullable11;
+const char* var_class_name12;
+val* var_k1 /* var k1: nullable Object */;
+val* var_k2 /* var k2: nullable Object */;
 val* var_v /* var v: nullable Object */;
-val* var9 /* : HashMap[Object, HashMap[Object, nullable Object]] */;
-val* var_level1 /* var level1: HashMap[Object, HashMap[Object, nullable Object]] */;
-short int var10 /* : Bool */;
-short int var11 /* : Bool */;
-val* var12 /* : HashMap[Object, nullable Object] */;
-val* var_level2 /* var level2: HashMap[Object, nullable Object] */;
-val* var13 /* : nullable Object */;
-/* Covariant cast for argument 0 (k1) <p0:Object> isa HashMap2#0 */
-/* <p0:Object> isa HashMap2#0 */
-type_struct = self->type->resolution_table->types[COLOR_more_collections__HashMap2_FT0];
+val* var13 /* : HashMap[nullable Object, HashMap[nullable Object, nullable Object]] */;
+val* var15 /* : HashMap[nullable Object, HashMap[nullable Object, nullable Object]] */;
+val* var_level1 /* var level1: HashMap[nullable Object, HashMap[nullable Object, nullable Object]] */;
+val* var16 /* : nullable Object */;
+val* var_level2 /* var level2: nullable HashMap[nullable Object, nullable Object] */;
+val* var17 /* : null */;
+short int var18 /* : Bool */;
+short int var19 /* : Bool */;
+val* var_other /* var other: nullable Object */;
+short int var21 /* : Bool */;
+short int var23 /* : Bool */;
+val* var24 /* : HashMap[nullable Object, nullable Object] */;
+/* Covariant cast for argument 0 (k1) <p0:nullable Object> isa K1 */
+/* <p0:nullable Object> isa K1 */
+type_struct = self->type->resolution_table->types[COLOR_more_collections__HashMap2___35dK1];
 cltype = type_struct->color;
 idtype = type_struct->id;
+is_nullable = type_struct->is_nullable;
+if(p0 == NULL) {
+var = is_nullable;
+} else {
 if(cltype >= p0->type->table_size) {
 var = 0;
 } else {
 var = p0->type->type_table[cltype] == idtype;
 }
-if (!var) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Cast failed", "lib/more_collections.nit", 51);
-exit(1);
 }
-/* Covariant cast for argument 1 (k2) <p1:Object> isa HashMap2#1 */
-/* <p1:Object> isa HashMap2#1 */
-type_struct4 = self->type->resolution_table->types[COLOR_more_collections__HashMap2_FT1];
+if (unlikely(!var)) {
+var_class_name = p0 == NULL ? "null" : p0->type->name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "K1", var_class_name);
+PRINT_ERROR(" (%s:%d)\n", FILE_more_collections, 76);
+show_backtrace(1);
+}
+/* Covariant cast for argument 1 (k2) <p1:nullable Object> isa K2 */
+/* <p1:nullable Object> isa K2 */
+type_struct4 = self->type->resolution_table->types[COLOR_more_collections__HashMap2___35dK2];
 cltype2 = type_struct4->color;
 idtype3 = type_struct4->id;
+is_nullable5 = type_struct4->is_nullable;
+if(p1 == NULL) {
+var1 = is_nullable5;
+} else {
 if(cltype2 >= p1->type->table_size) {
 var1 = 0;
 } else {
 var1 = p1->type->type_table[cltype2] == idtype3;
 }
-if (!var1) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Cast failed", "lib/more_collections.nit", 51);
-exit(1);
 }
-/* Covariant cast for argument 2 (v) <p2:nullable Object> isa HashMap2#2 */
-/* <p2:nullable Object> isa HashMap2#2 */
-type_struct8 = self->type->resolution_table->types[COLOR_more_collections__HashMap2_FT2];
-cltype6 = type_struct8->color;
-idtype7 = type_struct8->id;
-is_nullable = type_struct8->is_nullable;
+if (unlikely(!var1)) {
+var_class_name6 = p1 == NULL ? "null" : p1->type->name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "K2", var_class_name6);
+PRINT_ERROR(" (%s:%d)\n", FILE_more_collections, 76);
+show_backtrace(1);
+}
+/* Covariant cast for argument 2 (v) <p2:nullable Object> isa V */
+/* <p2:nullable Object> isa V */
+type_struct10 = self->type->resolution_table->types[COLOR_more_collections__HashMap2___35dV];
+cltype8 = type_struct10->color;
+idtype9 = type_struct10->id;
+is_nullable11 = type_struct10->is_nullable;
 if(p2 == NULL) {
-var5 = is_nullable;
+var7 = is_nullable11;
 } else {
-if(cltype6 >= p2->type->table_size) {
-var5 = 0;
+if(cltype8 >= p2->type->table_size) {
+var7 = 0;
 } else {
-var5 = p2->type->type_table[cltype6] == idtype7;
+var7 = p2->type->type_table[cltype8] == idtype9;
 }
 }
-if (!var5) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Cast failed", "lib/more_collections.nit", 51);
-exit(1);
+if (unlikely(!var7)) {
+var_class_name12 = p2 == NULL ? "null" : p2->type->name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "V", var_class_name12);
+PRINT_ERROR(" (%s:%d)\n", FILE_more_collections, 76);
+show_backtrace(1);
 }
 var_k1 = p0;
 var_k2 = p1;
 var_v = p2;
-var9 = ((val* (*)(val*))(self->class->vft[COLOR_more_collections__HashMap2__level1]))(self) /* level1 on <self:HashMap2[Object, Object, nullable Object]>*/;
-var_level1 = var9;
-var10 = ((short int (*)(val*, val*))(var_level1->class->vft[COLOR_abstract_collection__MapRead__has_key]))(var_level1, var_k1) /* has_key on <var_level1:HashMap[Object, HashMap[Object, nullable Object]]>*/;
-var11 = !var10;
-if (var11){
-var12 = NEW_hash_collection__HashMap(self->type->resolution_table->types[COLOR_hash_collection__HashMapmore_collections__HashMap2_FT1more_collections__HashMap2_FT2]);
-((void (*)(val*))(var12->class->vft[COLOR_hash_collection__HashMap__init]))(var12) /* init on <var12:HashMap[Object, nullable Object]>*/;
-CHECK_NEW_hash_collection__HashMap(var12);
-var_level2 = var12;
-((void (*)(val*, val*, val*))(var_level1->class->vft[COLOR_abstract_collection__Map___91d_93d_61d]))(var_level1, var_k1, var_level2) /* []= on <var_level1:HashMap[Object, HashMap[Object, nullable Object]]>*/;
-} else {
-var13 = ((val* (*)(val*, val*))(var_level1->class->vft[COLOR_abstract_collection__MapRead___91d_93d]))(var_level1, var_k1) /* [] on <var_level1:HashMap[Object, HashMap[Object, nullable Object]]>*/;
-var_level2 = var13;
-}
-((void (*)(val*, val*, val*))(var_level2->class->vft[COLOR_abstract_collection__Map___91d_93d_61d]))(var_level2, var_k2, var_v) /* []= on <var_level2:HashMap[Object, nullable Object]>*/;
-RET_LABEL:;
+{
+{ /* Inline more_collections#HashMap2#level1 (self) on <self:HashMap2[nullable Object, nullable Object, nullable Object]> */
+var15 = self->attrs[COLOR_more_collections__HashMap2___level1].val; /* _level1 on <self:HashMap2[nullable Object, nullable Object, nullable Object]> */
+if (unlikely(var15 == NULL)) {
+PRINT_ERROR("Runtime error: %s", "Uninitialized attribute _level1");
+PRINT_ERROR(" (%s:%d)\n", FILE_more_collections, 64);
+show_backtrace(1);
 }
-/* method more_collections#HashMap2#[]= for (self: Object, Object, Object, nullable Object) */
-void VIRTUAL_more_collections__HashMap2___91d_93d_61d(val* self, val* p0, val* p1, val* p2) {
-more_collections__HashMap2___91d_93d_61d(self, p0, p1, p2);
-RET_LABEL:;
+var13 = var15;
+RET_LABEL14:(void)0;
 }
-/* method more_collections#HashMap2#init for (self: HashMap2[Object, Object, nullable Object]) */
-void more_collections__HashMap2__init(val* self) {
-RET_LABEL:;
 }
-/* method more_collections#HashMap2#init for (self: Object) */
-void VIRTUAL_more_collections__HashMap2__init(val* self) {
-more_collections__HashMap2__init(self);
-RET_LABEL:;
+var_level1 = var13;
+{
+var16 = standard___standard__HashMap___standard__abstract_collection__MapRead__get_or_null(var_level1, var_k1);
 }
-/* method more_collections#HashMap3#level1 for (self: HashMap3[Object, Object, Object, nullable Object]): HashMap[Object, HashMap2[Object, Object, nullable Object]] */
-val* more_collections__HashMap3__level1(val* self) {
-val* var /* : HashMap[Object, HashMap2[Object, Object, nullable Object]] */;
-val* var1 /* : HashMap[Object, HashMap2[Object, Object, nullable Object]] */;
-var1 = self->attrs[COLOR_more_collections__HashMap3___64dlevel1].val; /* @level1 on <self:HashMap3[Object, Object, Object, nullable Object]> */
-if (var1 == NULL) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Uninitialized attribute @level1", "lib/more_collections.nit", 68);
-exit(1);
+var_level2 = var16;
+var17 = NULL;
+if (var_level2 == NULL) {
+var18 = 1; /* is null */
+} else {
+var18 = 0; /* arg is null but recv is not */
 }
-var = var1;
-RET_LABEL:;
-return var;
+if (0) {
+{ /* Inline kernel#Object#== (var_level2,var17) on <var_level2:nullable HashMap[nullable Object, nullable Object]> */
+var_other = var17;
+{
+{ /* Inline kernel#Object#is_same_instance (var_level2,var_other) on <var_level2:nullable HashMap[nullable Object, nullable Object](HashMap[nullable Object, nullable Object])> */
+var23 = var_level2 == var_other;
+var21 = var23;
+goto RET_LABEL22;
+RET_LABEL22:(void)0;
 }
-/* method more_collections#HashMap3#level1 for (self: Object): HashMap[Object, HashMap2[Object, Object, nullable Object]] */
-val* VIRTUAL_more_collections__HashMap3__level1(val* self) {
-val* var /* : HashMap[Object, HashMap2[Object, Object, nullable Object]] */;
-val* var1 /* : HashMap[Object, HashMap2[Object, Object, nullable Object]] */;
-var1 = more_collections__HashMap3__level1(self);
-var = var1;
-RET_LABEL:;
-return var;
 }
-/* method more_collections#HashMap3#level1= for (self: HashMap3[Object, Object, Object, nullable Object], HashMap[Object, HashMap2[Object, Object, nullable Object]]) */
-void more_collections__HashMap3__level1_61d(val* self, val* p0) {
-short int var /* : Bool */;
-int cltype;
-int idtype;
-const struct type* type_struct;
-/* Covariant cast for argument 0 (level1) <p0:HashMap[Object, HashMap2[Object, Object, nullable Object]]> isa HashMap[HashMap3#0, HashMap2[HashMap3#1, HashMap3#2, HashMap3#3]] */
-/* <p0:HashMap[Object, HashMap2[Object, Object, nullable Object]]> isa HashMap[HashMap3#0, HashMap2[HashMap3#1, HashMap3#2, HashMap3#3]] */
-type_struct = self->type->resolution_table->types[COLOR_hash_collection__HashMapmore_collections__HashMap3_FT0more_collections__HashMap2more_collections__HashMap3_FT1more_collections__HashMap3_FT2more_collections__HashMap3_FT3];
-cltype = type_struct->color;
-idtype = type_struct->id;
-if(cltype >= p0->type->table_size) {
-var = 0;
+var19 = var21;
+goto RET_LABEL20;
+RET_LABEL20:(void)0;
+}
+var18 = var19;
+}
+if (var18){
+var24 = NEW_standard__HashMap(self->type->resolution_table->types[COLOR_standard__HashMap__more_collections__HashMap2___35dK2__more_collections__HashMap2___35dV]);
+{
+standard___standard__HashMap___standard__kernel__Object__init(var24); /* Direct call hash_collection#HashMap#init on <var24:HashMap[nullable Object, nullable Object]>*/
+}
+var_level2 = var24;
+{
+standard___standard__HashMap___standard__abstract_collection__Map___91d_93d_61d(var_level1, var_k1, var_level2); /* Direct call hash_collection#HashMap#[]= on <var_level1:HashMap[nullable Object, HashMap[nullable Object, nullable Object]]>*/
+}
 } else {
-var = p0->type->type_table[cltype] == idtype;
 }
-if (!var) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Cast failed", "lib/more_collections.nit", 68);
-exit(1);
+{
+standard___standard__HashMap___standard__abstract_collection__Map___91d_93d_61d(var_level2, var_k2, var_v); /* Direct call hash_collection#HashMap#[]= on <var_level2:nullable HashMap[nullable Object, nullable Object](HashMap[nullable Object, nullable Object])>*/
 }
-self->attrs[COLOR_more_collections__HashMap3___64dlevel1].val = p0; /* @level1 on <self:HashMap3[Object, Object, Object, nullable Object]> */
 RET_LABEL:;
 }
-/* method more_collections#HashMap3#level1= for (self: Object, HashMap[Object, HashMap2[Object, Object, nullable Object]]) */
-void VIRTUAL_more_collections__HashMap3__level1_61d(val* self, val* p0) {
-more_collections__HashMap3__level1_61d(self, p0);
+/* method more_collections#HashMap3#level1 for (self: HashMap3[nullable Object, nullable Object, nullable Object, nullable Object]): HashMap[nullable Object, HashMap2[nullable Object, nullable Object, nullable Object]] */
+val* more_collections___more_collections__HashMap3___level1(val* self) {
+val* var /* : HashMap[nullable Object, HashMap2[nullable Object, nullable Object, nullable Object]] */;
+val* var1 /* : HashMap[nullable Object, HashMap2[nullable Object, nullable Object, nullable Object]] */;
+var1 = self->attrs[COLOR_more_collections__HashMap3___level1].val; /* _level1 on <self:HashMap3[nullable Object, nullable Object, nullable Object, nullable Object]> */
+if (unlikely(var1 == NULL)) {
+PRINT_ERROR("Runtime error: %s", "Uninitialized attribute _level1");
+PRINT_ERROR(" (%s:%d)\n", FILE_more_collections, 108);
+show_backtrace(1);
+}
+var = var1;
 RET_LABEL:;
+return var;
 }
-/* method more_collections#HashMap3#[] for (self: HashMap3[Object, Object, Object, nullable Object], Object, Object, Object): nullable Object */
-val* more_collections__HashMap3___91d_93d(val* self, val* p0, val* p1, val* p2) {
+/* method more_collections#HashMap3#[] for (self: HashMap3[nullable Object, nullable Object, nullable Object, nullable Object], nullable Object, nullable Object, nullable Object): nullable Object */
+val* more_collections___more_collections__HashMap3____91d_93d(val* self, val* p0, val* p1, val* p2) {
 val* var /* : nullable Object */;
 short int var1 /* : Bool */;
 int cltype;
 int idtype;
 const struct type* type_struct;
+short int is_nullable;
+const char* var_class_name;
 short int var2 /* : Bool */;
 int cltype3;
 int idtype4;
 const struct type* type_struct5;
-short int var6 /* : Bool */;
-int cltype7;
-int idtype8;
-const struct type* type_struct9;
-val* var_k1 /* var k1: Object */;
-val* var_k2 /* var k2: Object */;
-val* var_k3 /* var k3: Object */;
-val* var10 /* : HashMap[Object, HashMap2[Object, Object, nullable Object]] */;
-val* var_level1 /* var level1: HashMap[Object, HashMap2[Object, Object, nullable Object]] */;
-short int var11 /* : Bool */;
-short int var12 /* : Bool */;
-val* var13 /* : null */;
-val* var14 /* : nullable Object */;
-val* var_level2 /* var level2: HashMap2[Object, Object, nullable Object] */;
-val* var15 /* : nullable Object */;
-/* Covariant cast for argument 0 (k1) <p0:Object> isa HashMap3#0 */
-/* <p0:Object> isa HashMap3#0 */
-type_struct = self->type->resolution_table->types[COLOR_more_collections__HashMap3_FT0];
+short int is_nullable6;
+const char* var_class_name7;
+short int var8 /* : Bool */;
+int cltype9;
+int idtype10;
+const struct type* type_struct11;
+short int is_nullable12;
+const char* var_class_name13;
+val* var_k1 /* var k1: nullable Object */;
+val* var_k2 /* var k2: nullable Object */;
+val* var_k3 /* var k3: nullable Object */;
+val* var14 /* : HashMap[nullable Object, HashMap2[nullable Object, nullable Object, nullable Object]] */;
+val* var16 /* : HashMap[nullable Object, HashMap2[nullable Object, nullable Object, nullable Object]] */;
+val* var_level1 /* var level1: HashMap[nullable Object, HashMap2[nullable Object, nullable Object, nullable Object]] */;
+val* var17 /* : nullable Object */;
+val* var_level2 /* var level2: nullable HashMap2[nullable Object, nullable Object, nullable Object] */;
+val* var18 /* : null */;
+short int var19 /* : Bool */;
+short int var20 /* : Bool */;
+val* var_other /* var other: nullable Object */;
+short int var22 /* : Bool */;
+short int var24 /* : Bool */;
+val* var25 /* : null */;
+val* var26 /* : nullable Object */;
+/* Covariant cast for argument 0 (k1) <p0:nullable Object> isa K1 */
+/* <p0:nullable Object> isa K1 */
+type_struct = self->type->resolution_table->types[COLOR_more_collections__HashMap3___35dK1];
 cltype = type_struct->color;
 idtype = type_struct->id;
+is_nullable = type_struct->is_nullable;
+if(p0 == NULL) {
+var1 = is_nullable;
+} else {
 if(cltype >= p0->type->table_size) {
 var1 = 0;
 } else {
 var1 = p0->type->type_table[cltype] == idtype;
 }
-if (!var1) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Cast failed", "lib/more_collections.nit", 70);
-exit(1);
 }
-/* Covariant cast for argument 1 (k2) <p1:Object> isa HashMap3#1 */
-/* <p1:Object> isa HashMap3#1 */
-type_struct5 = self->type->resolution_table->types[COLOR_more_collections__HashMap3_FT1];
+if (unlikely(!var1)) {
+var_class_name = p0 == NULL ? "null" : p0->type->name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "K1", var_class_name);
+PRINT_ERROR(" (%s:%d)\n", FILE_more_collections, 110);
+show_backtrace(1);
+}
+/* Covariant cast for argument 1 (k2) <p1:nullable Object> isa K2 */
+/* <p1:nullable Object> isa K2 */
+type_struct5 = self->type->resolution_table->types[COLOR_more_collections__HashMap3___35dK2];
 cltype3 = type_struct5->color;
 idtype4 = type_struct5->id;
+is_nullable6 = type_struct5->is_nullable;
+if(p1 == NULL) {
+var2 = is_nullable6;
+} else {
 if(cltype3 >= p1->type->table_size) {
 var2 = 0;
 } else {
 var2 = p1->type->type_table[cltype3] == idtype4;
 }
-if (!var2) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Cast failed", "lib/more_collections.nit", 70);
-exit(1);
 }
-/* Covariant cast for argument 2 (k3) <p2:Object> isa HashMap3#2 */
-/* <p2:Object> isa HashMap3#2 */
-type_struct9 = self->type->resolution_table->types[COLOR_more_collections__HashMap3_FT2];
-cltype7 = type_struct9->color;
-idtype8 = type_struct9->id;
-if(cltype7 >= p2->type->table_size) {
-var6 = 0;
+if (unlikely(!var2)) {
+var_class_name7 = p1 == NULL ? "null" : p1->type->name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "K2", var_class_name7);
+PRINT_ERROR(" (%s:%d)\n", FILE_more_collections, 110);
+show_backtrace(1);
+}
+/* Covariant cast for argument 2 (k3) <p2:nullable Object> isa K3 */
+/* <p2:nullable Object> isa K3 */
+type_struct11 = self->type->resolution_table->types[COLOR_more_collections__HashMap3___35dK3];
+cltype9 = type_struct11->color;
+idtype10 = type_struct11->id;
+is_nullable12 = type_struct11->is_nullable;
+if(p2 == NULL) {
+var8 = is_nullable12;
+} else {
+if(cltype9 >= p2->type->table_size) {
+var8 = 0;
 } else {
-var6 = p2->type->type_table[cltype7] == idtype8;
+var8 = p2->type->type_table[cltype9] == idtype10;
 }
-if (!var6) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Cast failed", "lib/more_collections.nit", 70);
-exit(1);
+}
+if (unlikely(!var8)) {
+var_class_name13 = p2 == NULL ? "null" : p2->type->name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "K3", var_class_name13);
+PRINT_ERROR(" (%s:%d)\n", FILE_more_collections, 110);
+show_backtrace(1);
 }
 var_k1 = p0;
 var_k2 = p1;
 var_k3 = p2;
-var10 = ((val* (*)(val*))(self->class->vft[COLOR_more_collections__HashMap3__level1]))(self) /* level1 on <self:HashMap3[Object, Object, Object, nullable Object]>*/;
-var_level1 = var10;
-var11 = ((short int (*)(val*, val*))(var_level1->class->vft[COLOR_abstract_collection__MapRead__has_key]))(var_level1, var_k1) /* has_key on <var_level1:HashMap[Object, HashMap2[Object, Object, nullable Object]]>*/;
-var12 = !var11;
-if (var12){
-var13 = NULL;
-var = var13;
-goto RET_LABEL;
+{
+{ /* Inline more_collections#HashMap3#level1 (self) on <self:HashMap3[nullable Object, nullable Object, nullable Object, nullable Object]> */
+var16 = self->attrs[COLOR_more_collections__HashMap3___level1].val; /* _level1 on <self:HashMap3[nullable Object, nullable Object, nullable Object, nullable Object]> */
+if (unlikely(var16 == NULL)) {
+PRINT_ERROR("Runtime error: %s", "Uninitialized attribute _level1");
+PRINT_ERROR(" (%s:%d)\n", FILE_more_collections, 108);
+show_backtrace(1);
+}
+var14 = var16;
+RET_LABEL15:(void)0;
+}
+}
+var_level1 = var14;
+{
+var17 = standard___standard__HashMap___standard__abstract_collection__MapRead__get_or_null(var_level1, var_k1);
+}
+var_level2 = var17;
+var18 = NULL;
+if (var_level2 == NULL) {
+var19 = 1; /* is null */
 } else {
+var19 = 0; /* arg is null but recv is not */
+}
+if (0) {
+{ /* Inline kernel#Object#== (var_level2,var18) on <var_level2:nullable HashMap2[nullable Object, nullable Object, nullable Object]> */
+var_other = var18;
+{
+{ /* Inline kernel#Object#is_same_instance (var_level2,var_other) on <var_level2:nullable HashMap2[nullable Object, nullable Object, nullable Object](HashMap2[nullable Object, nullable Object, nullable Object])> */
+var24 = var_level2 == var_other;
+var22 = var24;
+goto RET_LABEL23;
+RET_LABEL23:(void)0;
+}
+}
+var20 = var22;
+goto RET_LABEL21;
+RET_LABEL21:(void)0;
 }
-var14 = ((val* (*)(val*, val*))(var_level1->class->vft[COLOR_abstract_collection__MapRead___91d_93d]))(var_level1, var_k1) /* [] on <var_level1:HashMap[Object, HashMap2[Object, Object, nullable Object]]>*/;
-var_level2 = var14;
-var15 = ((val* (*)(val*, val*, val*))(var_level2->class->vft[COLOR_more_collections__HashMap2___91d_93d]))(var_level2, var_k2, var_k3) /* [] on <var_level2:HashMap2[Object, Object, nullable Object]>*/;
-var = var15;
+var19 = var20;
+}
+if (var19){
+var25 = NULL;
+var = var25;
 goto RET_LABEL;
-RET_LABEL:;
-return var;
+} else {
 }
-/* method more_collections#HashMap3#[] for (self: Object, Object, Object, Object): nullable Object */
-val* VIRTUAL_more_collections__HashMap3___91d_93d(val* self, val* p0, val* p1, val* p2) {
-val* var /* : nullable Object */;
-val* var1 /* : nullable Object */;
-var1 = more_collections__HashMap3___91d_93d(self, p0, p1, p2);
-var = var1;
+{
+var26 = more_collections___more_collections__HashMap2____91d_93d(var_level2, var_k2, var_k3);
+}
+var = var26;
+goto RET_LABEL;
 RET_LABEL:;
 return var;
 }
-/* method more_collections#HashMap3#[]= for (self: HashMap3[Object, Object, Object, nullable Object], Object, Object, Object, nullable Object) */
-void more_collections__HashMap3___91d_93d_61d(val* self, val* p0, val* p1, val* p2, val* p3) {
+/* method more_collections#HashMap3#[]= for (self: HashMap3[nullable Object, nullable Object, nullable Object, nullable Object], nullable Object, nullable Object, nullable Object, nullable Object) */
+void more_collections___more_collections__HashMap3____91d_93d_61d(val* self, val* p0, val* p1, val* p2, val* p3) {
 short int var /* : Bool */;
 int cltype;
 int idtype;
 const struct type* type_struct;
+short int is_nullable;
+const char* var_class_name;
 short int var1 /* : Bool */;
 int cltype2;
 int idtype3;
 const struct type* type_struct4;
-short int var5 /* : Bool */;
-int cltype6;
-int idtype7;
-const struct type* type_struct8;
-short int var9 /* : Bool */;
-int cltype10;
-int idtype11;
-const struct type* type_struct12;
-short int is_nullable;
-val* var_k1 /* var k1: Object */;
-val* var_k2 /* var k2: Object */;
-val* var_k3 /* var k3: Object */;
+short int is_nullable5;
+const char* var_class_name6;
+short int var7 /* : Bool */;
+int cltype8;
+int idtype9;
+const struct type* type_struct10;
+short int is_nullable11;
+const char* var_class_name12;
+short int var13 /* : Bool */;
+int cltype14;
+int idtype15;
+const struct type* type_struct16;
+short int is_nullable17;
+const char* var_class_name18;
+val* var_k1 /* var k1: nullable Object */;
+val* var_k2 /* var k2: nullable Object */;
+val* var_k3 /* var k3: nullable Object */;
 val* var_v /* var v: nullable Object */;
-val* var13 /* : HashMap[Object, HashMap2[Object, Object, nullable Object]] */;
-val* var_level1 /* var level1: HashMap[Object, HashMap2[Object, Object, nullable Object]] */;
-short int var14 /* : Bool */;
-short int var15 /* : Bool */;
-val* var16 /* : HashMap2[Object, Object, nullable Object] */;
-val* var_level2 /* var level2: HashMap2[Object, Object, nullable Object] */;
-val* var17 /* : nullable Object */;
-/* Covariant cast for argument 0 (k1) <p0:Object> isa HashMap3#0 */
-/* <p0:Object> isa HashMap3#0 */
-type_struct = self->type->resolution_table->types[COLOR_more_collections__HashMap3_FT0];
+val* var19 /* : HashMap[nullable Object, HashMap2[nullable Object, nullable Object, nullable Object]] */;
+val* var21 /* : HashMap[nullable Object, HashMap2[nullable Object, nullable Object, nullable Object]] */;
+val* var_level1 /* var level1: HashMap[nullable Object, HashMap2[nullable Object, nullable Object, nullable Object]] */;
+val* var22 /* : nullable Object */;
+val* var_level2 /* var level2: nullable HashMap2[nullable Object, nullable Object, nullable Object] */;
+val* var23 /* : null */;
+short int var24 /* : Bool */;
+short int var25 /* : Bool */;
+val* var_other /* var other: nullable Object */;
+short int var27 /* : Bool */;
+short int var29 /* : Bool */;
+val* var30 /* : HashMap2[nullable Object, nullable Object, nullable Object] */;
+/* Covariant cast for argument 0 (k1) <p0:nullable Object> isa K1 */
+/* <p0:nullable Object> isa K1 */
+type_struct = self->type->resolution_table->types[COLOR_more_collections__HashMap3___35dK1];
 cltype = type_struct->color;
 idtype = type_struct->id;
+is_nullable = type_struct->is_nullable;
+if(p0 == NULL) {
+var = is_nullable;
+} else {
 if(cltype >= p0->type->table_size) {
 var = 0;
 } else {
 var = p0->type->type_table[cltype] == idtype;
 }
-if (!var) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Cast failed", "lib/more_collections.nit", 80);
-exit(1);
 }
-/* Covariant cast for argument 1 (k2) <p1:Object> isa HashMap3#1 */
-/* <p1:Object> isa HashMap3#1 */
-type_struct4 = self->type->resolution_table->types[COLOR_more_collections__HashMap3_FT1];
+if (unlikely(!var)) {
+var_class_name = p0 == NULL ? "null" : p0->type->name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "K1", var_class_name);
+PRINT_ERROR(" (%s:%d)\n", FILE_more_collections, 120);
+show_backtrace(1);
+}
+/* Covariant cast for argument 1 (k2) <p1:nullable Object> isa K2 */
+/* <p1:nullable Object> isa K2 */
+type_struct4 = self->type->resolution_table->types[COLOR_more_collections__HashMap3___35dK2];
 cltype2 = type_struct4->color;
 idtype3 = type_struct4->id;
+is_nullable5 = type_struct4->is_nullable;
+if(p1 == NULL) {
+var1 = is_nullable5;
+} else {
 if(cltype2 >= p1->type->table_size) {
 var1 = 0;
 } else {
 var1 = p1->type->type_table[cltype2] == idtype3;
 }
-if (!var1) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Cast failed", "lib/more_collections.nit", 80);
-exit(1);
-}
-/* Covariant cast for argument 2 (k3) <p2:Object> isa HashMap3#2 */
-/* <p2:Object> isa HashMap3#2 */
-type_struct8 = self->type->resolution_table->types[COLOR_more_collections__HashMap3_FT2];
-cltype6 = type_struct8->color;
-idtype7 = type_struct8->id;
-if(cltype6 >= p2->type->table_size) {
-var5 = 0;
-} else {
-var5 = p2->type->type_table[cltype6] == idtype7;
-}
-if (!var5) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Cast failed", "lib/more_collections.nit", 80);
-exit(1);
-}
-/* Covariant cast for argument 3 (v) <p3:nullable Object> isa HashMap3#3 */
-/* <p3:nullable Object> isa HashMap3#3 */
-type_struct12 = self->type->resolution_table->types[COLOR_more_collections__HashMap3_FT3];
-cltype10 = type_struct12->color;
-idtype11 = type_struct12->id;
-is_nullable = type_struct12->is_nullable;
+}
+if (unlikely(!var1)) {
+var_class_name6 = p1 == NULL ? "null" : p1->type->name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "K2", var_class_name6);
+PRINT_ERROR(" (%s:%d)\n", FILE_more_collections, 120);
+show_backtrace(1);
+}
+/* Covariant cast for argument 2 (k3) <p2:nullable Object> isa K3 */
+/* <p2:nullable Object> isa K3 */
+type_struct10 = self->type->resolution_table->types[COLOR_more_collections__HashMap3___35dK3];
+cltype8 = type_struct10->color;
+idtype9 = type_struct10->id;
+is_nullable11 = type_struct10->is_nullable;
+if(p2 == NULL) {
+var7 = is_nullable11;
+} else {
+if(cltype8 >= p2->type->table_size) {
+var7 = 0;
+} else {
+var7 = p2->type->type_table[cltype8] == idtype9;
+}
+}
+if (unlikely(!var7)) {
+var_class_name12 = p2 == NULL ? "null" : p2->type->name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "K3", var_class_name12);
+PRINT_ERROR(" (%s:%d)\n", FILE_more_collections, 120);
+show_backtrace(1);
+}
+/* Covariant cast for argument 3 (v) <p3:nullable Object> isa V */
+/* <p3:nullable Object> isa V */
+type_struct16 = self->type->resolution_table->types[COLOR_more_collections__HashMap3___35dV];
+cltype14 = type_struct16->color;
+idtype15 = type_struct16->id;
+is_nullable17 = type_struct16->is_nullable;
 if(p3 == NULL) {
-var9 = is_nullable;
+var13 = is_nullable17;
 } else {
-if(cltype10 >= p3->type->table_size) {
-var9 = 0;
+if(cltype14 >= p3->type->table_size) {
+var13 = 0;
 } else {
-var9 = p3->type->type_table[cltype10] == idtype11;
+var13 = p3->type->type_table[cltype14] == idtype15;
 }
 }
-if (!var9) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Cast failed", "lib/more_collections.nit", 80);
-exit(1);
+if (unlikely(!var13)) {
+var_class_name18 = p3 == NULL ? "null" : p3->type->name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "V", var_class_name18);
+PRINT_ERROR(" (%s:%d)\n", FILE_more_collections, 120);
+show_backtrace(1);
 }
 var_k1 = p0;
 var_k2 = p1;
 var_k3 = p2;
 var_v = p3;
-var13 = ((val* (*)(val*))(self->class->vft[COLOR_more_collections__HashMap3__level1]))(self) /* level1 on <self:HashMap3[Object, Object, Object, nullable Object]>*/;
-var_level1 = var13;
-var14 = ((short int (*)(val*, val*))(var_level1->class->vft[COLOR_abstract_collection__MapRead__has_key]))(var_level1, var_k1) /* has_key on <var_level1:HashMap[Object, HashMap2[Object, Object, nullable Object]]>*/;
-var15 = !var14;
-if (var15){
-var16 = NEW_more_collections__HashMap2(self->type->resolution_table->types[COLOR_more_collections__HashMap2more_collections__HashMap3_FT1more_collections__HashMap3_FT2more_collections__HashMap3_FT3]);
-((void (*)(val*))(var16->class->vft[COLOR_more_collections__HashMap2__init]))(var16) /* init on <var16:HashMap2[Object, Object, nullable Object]>*/;
-CHECK_NEW_more_collections__HashMap2(var16);
-var_level2 = var16;
-((void (*)(val*, val*, val*))(var_level1->class->vft[COLOR_abstract_collection__Map___91d_93d_61d]))(var_level1, var_k1, var_level2) /* []= on <var_level1:HashMap[Object, HashMap2[Object, Object, nullable Object]]>*/;
+{
+{ /* Inline more_collections#HashMap3#level1 (self) on <self:HashMap3[nullable Object, nullable Object, nullable Object, nullable Object]> */
+var21 = self->attrs[COLOR_more_collections__HashMap3___level1].val; /* _level1 on <self:HashMap3[nullable Object, nullable Object, nullable Object, nullable Object]> */
+if (unlikely(var21 == NULL)) {
+PRINT_ERROR("Runtime error: %s", "Uninitialized attribute _level1");
+PRINT_ERROR(" (%s:%d)\n", FILE_more_collections, 108);
+show_backtrace(1);
+}
+var19 = var21;
+RET_LABEL20:(void)0;
+}
+}
+var_level1 = var19;
+{
+var22 = standard___standard__HashMap___standard__abstract_collection__MapRead__get_or_null(var_level1, var_k1);
+}
+var_level2 = var22;
+var23 = NULL;
+if (var_level2 == NULL) {
+var24 = 1; /* is null */
 } else {
-var17 = ((val* (*)(val*, val*))(var_level1->class->vft[COLOR_abstract_collection__MapRead___91d_93d]))(var_level1, var_k1) /* [] on <var_level1:HashMap[Object, HashMap2[Object, Object, nullable Object]]>*/;
-var_level2 = var17;
+var24 = 0; /* arg is null but recv is not */
 }
-((void (*)(val*, val*, val*, val*))(var_level2->class->vft[COLOR_more_collections__HashMap2___91d_93d_61d]))(var_level2, var_k2, var_k3, var_v) /* []= on <var_level2:HashMap2[Object, Object, nullable Object]>*/;
-RET_LABEL:;
+if (0) {
+{ /* Inline kernel#Object#== (var_level2,var23) on <var_level2:nullable HashMap2[nullable Object, nullable Object, nullable Object]> */
+var_other = var23;
+{
+{ /* Inline kernel#Object#is_same_instance (var_level2,var_other) on <var_level2:nullable HashMap2[nullable Object, nullable Object, nullable Object](HashMap2[nullable Object, nullable Object, nullable Object])> */
+var29 = var_level2 == var_other;
+var27 = var29;
+goto RET_LABEL28;
+RET_LABEL28:(void)0;
 }
-/* method more_collections#HashMap3#[]= for (self: Object, Object, Object, Object, nullable Object) */
-void VIRTUAL_more_collections__HashMap3___91d_93d_61d(val* self, val* p0, val* p1, val* p2, val* p3) {
-more_collections__HashMap3___91d_93d_61d(self, p0, p1, p2, p3);
-RET_LABEL:;
 }
-/* method more_collections#HashMap3#init for (self: HashMap3[Object, Object, Object, nullable Object]) */
-void more_collections__HashMap3__init(val* self) {
-RET_LABEL:;
+var25 = var27;
+goto RET_LABEL26;
+RET_LABEL26:(void)0;
+}
+var24 = var25;
+}
+if (var24){
+var30 = NEW_more_collections__HashMap2(self->type->resolution_table->types[COLOR_more_collections__HashMap2__more_collections__HashMap3___35dK2__more_collections__HashMap3___35dK3__more_collections__HashMap3___35dV]);
+{
+{ /* Inline kernel#Object#init (var30) on <var30:HashMap2[nullable Object, nullable Object, nullable Object]> */
+RET_LABEL31:(void)0;
+}
+}
+var_level2 = var30;
+{
+standard___standard__HashMap___standard__abstract_collection__Map___91d_93d_61d(var_level1, var_k1, var_level2); /* Direct call hash_collection#HashMap#[]= on <var_level1:HashMap[nullable Object, HashMap2[nullable Object, nullable Object, nullable Object]]>*/
+}
+} else {
+}
+{
+more_collections___more_collections__HashMap2____91d_93d_61d(var_level2, var_k2, var_k3, var_v); /* Direct call more_collections#HashMap2#[]= on <var_level2:nullable HashMap2[nullable Object, nullable Object, nullable Object](HashMap2[nullable Object, nullable Object, nullable Object])>*/
 }
-/* method more_collections#HashMap3#init for (self: Object) */
-void VIRTUAL_more_collections__HashMap3__init(val* self) {
-more_collections__HashMap3__init(self);
 RET_LABEL:;
 }