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

diff --git a/c_src/parser.sep.8.c b/c_src/parser.sep.8.c
index 52c4582..7e7be9f 100644
--- a/c_src/parser.sep.8.c
+++ b/c_src/parser.sep.8.c
@@ -99,15 +99,12 @@ var11 = ((val* (*)(val*))(var_p->class->vft[COLOR_parser__Parser__pop]))(var_p)
 var_nodearraylist1 = var11;
 var12 = NEW_array__Array(&type_array__Arraykernel__Object);
 ((void (*)(val*))(var12->class->vft[COLOR_array__Array__init]))(var12) /* init on <var12:Array[Object]>*/;
-CHECK_NEW_array__Array(var12);
 var_listnode7 = var12;
 var13 = NEW_array__Array(&type_array__Arraykernel__Object);
 ((void (*)(val*))(var13->class->vft[COLOR_array__Array__init]))(var13) /* init on <var13:Array[Object]>*/;
-CHECK_NEW_array__Array(var13);
 var_listnode11 = var13;
 var14 = NEW_array__Array(&type_array__Arraykernel__Object);
 ((void (*)(val*))(var14->class->vft[COLOR_array__Array__init]))(var14) /* init on <var14:Array[Object]>*/;
-CHECK_NEW_array__Array(var14);
 var_listnode13 = var14;
 var_pdocnode2 = var_nodearraylist1;
 /* <var_pdocnode2:nullable Object> isa nullable ADoc */
@@ -123,8 +120,9 @@ var15 = var_pdocnode2->type->type_table[cltype] == idtype;
 }
 }
 if (!var15) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 12733);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 12485);
+show_backtrace(1);
 }
 var_tkwredefnode3 = var_nodearraylist2;
 /* <var_tkwredefnode3:nullable Object> isa nullable TKwredef */
@@ -140,8 +138,9 @@ var16 = var_tkwredefnode3->type->type_table[cltype17] == idtype18;
 }
 }
 if (!var16) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 12735);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 12487);
+show_backtrace(1);
 }
 var_pvisibilitynode4 = var_nodearraylist3;
 /* <var_pvisibilitynode4:nullable Object> isa nullable AVisibility */
@@ -157,8 +156,9 @@ var19 = var_pvisibilitynode4->type->type_table[cltype20] == idtype21;
 }
 }
 if (!var19) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 12737);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 12489);
+show_backtrace(1);
 }
 var_pclasskindnode5 = var_nodearraylist4;
 /* <var_pclasskindnode5:nullable Object> isa nullable AClasskind */
@@ -174,8 +174,9 @@ var22 = var_pclasskindnode5->type->type_table[cltype23] == idtype24;
 }
 }
 if (!var22) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 12739);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 12491);
+show_backtrace(1);
 }
 var_tclassidnode6 = var_nodearraylist7;
 /* <var_tclassidnode6:nullable Object> isa nullable TClassid */
@@ -191,8 +192,9 @@ var25 = var_tclassidnode6->type->type_table[cltype26] == idtype27;
 }
 }
 if (!var25) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 12741);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 12493);
+show_backtrace(1);
 }
 var_listnode10 = var_nodearraylist8;
 /* <var_listnode10:nullable Object> isa Array[Object] */
@@ -208,8 +210,9 @@ var28 = var_listnode10->type->type_table[cltype29] == idtype30;
 }
 }
 if (!var28) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 12743);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 12495);
+show_backtrace(1);
 }
 var31 = ((val* (*)(val*, val*, val*))(self->class->vft[COLOR_parser__ReduceAction__concat]))(self, var_listnode11, var_listnode10) /* concat on <self:ReduceAction270>*/;
 var_listnode11 = var31;
@@ -227,8 +230,9 @@ var32 = var_listnode12->type->type_table[cltype33] == idtype34;
 }
 }
 if (!var32) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 12746);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 12498);
+show_backtrace(1);
 }
 var35 = ((val* (*)(val*, val*, val*))(self->class->vft[COLOR_parser__ReduceAction__concat]))(self, var_listnode13, var_listnode12) /* concat on <self:ReduceAction270>*/;
 var_listnode13 = var35;
@@ -246,14 +250,14 @@ var36 = var_tkwendnode14->type->type_table[cltype37] == idtype38;
 }
 }
 if (!var36) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 12749);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 12501);
+show_backtrace(1);
 }
 var39 = NEW_parser_nodes__AStdClassdef(&type_parser_nodes__AStdClassdef);
 var40 = NULL;
 var41 = NULL;
 ((void (*)(val*, val*, val*, val*, val*, val*, val*, val*, val*, val*, val*, val*))(var39->class->vft[COLOR_parser_prod__AStdClassdef__init_astdclassdef]))(var39, var_pdocnode2, var_tkwredefnode3, var_pvisibilitynode4, var_pclasskindnode5, var_tclassidnode6, var_listnode7, var40, var41, var_listnode11, var_listnode13, var_tkwendnode14) /* init_astdclassdef on <var39:AStdClassdef>*/;
-CHECK_NEW_parser_nodes__AStdClassdef(var39);
 var_pclassdefnode1 = var39;
 var_node_list = var_pclassdefnode1;
 var42 = self->attrs[COLOR_parser__ReduceAction___goto].l; /* _goto on <self:ReduceAction270> */
@@ -370,15 +374,12 @@ var12 = ((val* (*)(val*))(var_p->class->vft[COLOR_parser__Parser__pop]))(var_p)
 var_nodearraylist1 = var12;
 var13 = NEW_array__Array(&type_array__Arraykernel__Object);
 ((void (*)(val*))(var13->class->vft[COLOR_array__Array__init]))(var13) /* init on <var13:Array[Object]>*/;
-CHECK_NEW_array__Array(var13);
 var_listnode7 = var13;
 var14 = NEW_array__Array(&type_array__Arraykernel__Object);
 ((void (*)(val*))(var14->class->vft[COLOR_array__Array__init]))(var14) /* init on <var14:Array[Object]>*/;
-CHECK_NEW_array__Array(var14);
 var_listnode11 = var14;
 var15 = NEW_array__Array(&type_array__Arraykernel__Object);
 ((void (*)(val*))(var15->class->vft[COLOR_array__Array__init]))(var15) /* init on <var15:Array[Object]>*/;
-CHECK_NEW_array__Array(var15);
 var_listnode13 = var15;
 var_pdocnode2 = var_nodearraylist1;
 /* <var_pdocnode2:nullable Object> isa nullable ADoc */
@@ -394,8 +395,9 @@ var16 = var_pdocnode2->type->type_table[cltype] == idtype;
 }
 }
 if (!var16) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 12788);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 12540);
+show_backtrace(1);
 }
 var_tkwredefnode3 = var_nodearraylist2;
 /* <var_tkwredefnode3:nullable Object> isa nullable TKwredef */
@@ -411,8 +413,9 @@ var17 = var_tkwredefnode3->type->type_table[cltype18] == idtype19;
 }
 }
 if (!var17) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 12790);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 12542);
+show_backtrace(1);
 }
 var_pvisibilitynode4 = var_nodearraylist3;
 /* <var_pvisibilitynode4:nullable Object> isa nullable AVisibility */
@@ -428,8 +431,9 @@ var20 = var_pvisibilitynode4->type->type_table[cltype21] == idtype22;
 }
 }
 if (!var20) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 12792);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 12544);
+show_backtrace(1);
 }
 var_pclasskindnode5 = var_nodearraylist4;
 /* <var_pclasskindnode5:nullable Object> isa nullable AClasskind */
@@ -445,8 +449,9 @@ var23 = var_pclasskindnode5->type->type_table[cltype24] == idtype25;
 }
 }
 if (!var23) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 12794);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 12546);
+show_backtrace(1);
 }
 var_tclassidnode6 = var_nodearraylist8;
 /* <var_tclassidnode6:nullable Object> isa nullable TClassid */
@@ -462,8 +467,9 @@ var26 = var_tclassidnode6->type->type_table[cltype27] == idtype28;
 }
 }
 if (!var26) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 12796);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 12548);
+show_backtrace(1);
 }
 var_listnode10 = var_nodearraylist9;
 /* <var_listnode10:nullable Object> isa Array[Object] */
@@ -479,8 +485,9 @@ var29 = var_listnode10->type->type_table[cltype30] == idtype31;
 }
 }
 if (!var29) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 12798);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 12550);
+show_backtrace(1);
 }
 var32 = ((val* (*)(val*, val*, val*))(self->class->vft[COLOR_parser__ReduceAction__concat]))(self, var_listnode11, var_listnode10) /* concat on <self:ReduceAction271>*/;
 var_listnode11 = var32;
@@ -498,8 +505,9 @@ var33 = var_listnode12->type->type_table[cltype34] == idtype35;
 }
 }
 if (!var33) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 12801);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 12553);
+show_backtrace(1);
 }
 var36 = ((val* (*)(val*, val*, val*))(self->class->vft[COLOR_parser__ReduceAction__concat]))(self, var_listnode13, var_listnode12) /* concat on <self:ReduceAction271>*/;
 var_listnode13 = var36;
@@ -517,14 +525,14 @@ var37 = var_tkwendnode14->type->type_table[cltype38] == idtype39;
 }
 }
 if (!var37) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 12804);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 12556);
+show_backtrace(1);
 }
 var40 = NEW_parser_nodes__AStdClassdef(&type_parser_nodes__AStdClassdef);
 var41 = NULL;
 var42 = NULL;
 ((void (*)(val*, val*, val*, val*, val*, val*, val*, val*, val*, val*, val*, val*))(var40->class->vft[COLOR_parser_prod__AStdClassdef__init_astdclassdef]))(var40, var_pdocnode2, var_tkwredefnode3, var_pvisibilitynode4, var_pclasskindnode5, var_tclassidnode6, var_listnode7, var41, var42, var_listnode11, var_listnode13, var_tkwendnode14) /* init_astdclassdef on <var40:AStdClassdef>*/;
-CHECK_NEW_parser_nodes__AStdClassdef(var40);
 var_pclassdefnode1 = var40;
 var_node_list = var_pclassdefnode1;
 var43 = self->attrs[COLOR_parser__ReduceAction___goto].l; /* _goto on <self:ReduceAction271> */
@@ -635,15 +643,12 @@ var10 = ((val* (*)(val*))(var_p->class->vft[COLOR_parser__Parser__pop]))(var_p)
 var_nodearraylist1 = var10;
 var11 = NEW_array__Array(&type_array__Arraykernel__Object);
 ((void (*)(val*))(var11->class->vft[COLOR_array__Array__init]))(var11) /* init on <var11:Array[Object]>*/;
-CHECK_NEW_array__Array(var11);
 var_listnode8 = var11;
 var12 = NEW_array__Array(&type_array__Arraykernel__Object);
 ((void (*)(val*))(var12->class->vft[COLOR_array__Array__init]))(var12) /* init on <var12:Array[Object]>*/;
-CHECK_NEW_array__Array(var12);
 var_listnode12 = var12;
 var13 = NEW_array__Array(&type_array__Arraykernel__Object);
 ((void (*)(val*))(var13->class->vft[COLOR_array__Array__init]))(var13) /* init on <var13:Array[Object]>*/;
-CHECK_NEW_array__Array(var13);
 var_listnode14 = var13;
 var_pdocnode2 = var_nodearraylist1;
 /* <var_pdocnode2:nullable Object> isa nullable ADoc */
@@ -659,8 +664,9 @@ var14 = var_pdocnode2->type->type_table[cltype] == idtype;
 }
 }
 if (!var14) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 12841);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 12593);
+show_backtrace(1);
 }
 var_pvisibilitynode4 = var_nodearraylist2;
 /* <var_pvisibilitynode4:nullable Object> isa nullable AVisibility */
@@ -676,8 +682,9 @@ var15 = var_pvisibilitynode4->type->type_table[cltype16] == idtype17;
 }
 }
 if (!var15) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 12843);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 12595);
+show_backtrace(1);
 }
 var_pclasskindnode5 = var_nodearraylist3;
 /* <var_pclasskindnode5:nullable Object> isa nullable AClasskind */
@@ -693,8 +700,9 @@ var18 = var_pclasskindnode5->type->type_table[cltype19] == idtype20;
 }
 }
 if (!var18) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 12845);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 12597);
+show_backtrace(1);
 }
 var_tclassidnode6 = var_nodearraylist5;
 /* <var_tclassidnode6:nullable Object> isa nullable TClassid */
@@ -710,8 +718,9 @@ var21 = var_tclassidnode6->type->type_table[cltype22] == idtype23;
 }
 }
 if (!var21) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 12847);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 12599);
+show_backtrace(1);
 }
 var_listnode7 = var_nodearraylist6;
 /* <var_listnode7:nullable Object> isa Array[Object] */
@@ -727,8 +736,9 @@ var24 = var_listnode7->type->type_table[cltype25] == idtype26;
 }
 }
 if (!var24) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 12849);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 12601);
+show_backtrace(1);
 }
 var27 = ((val* (*)(val*, val*, val*))(self->class->vft[COLOR_parser__ReduceAction__concat]))(self, var_listnode8, var_listnode7) /* concat on <self:ReduceAction273>*/;
 var_listnode8 = var27;
@@ -746,8 +756,9 @@ var28 = var_listnode11->type->type_table[cltype29] == idtype30;
 }
 }
 if (!var28) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 12852);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 12604);
+show_backtrace(1);
 }
 var31 = ((val* (*)(val*, val*, val*))(self->class->vft[COLOR_parser__ReduceAction__concat]))(self, var_listnode12, var_listnode11) /* concat on <self:ReduceAction273>*/;
 var_listnode12 = var31;
@@ -765,8 +776,9 @@ var32 = var_listnode13->type->type_table[cltype33] == idtype34;
 }
 }
 if (!var32) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 12855);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 12607);
+show_backtrace(1);
 }
 var35 = ((val* (*)(val*, val*, val*))(self->class->vft[COLOR_parser__ReduceAction__concat]))(self, var_listnode14, var_listnode13) /* concat on <self:ReduceAction273>*/;
 var_listnode14 = var35;
@@ -784,15 +796,15 @@ var36 = var_tkwendnode15->type->type_table[cltype37] == idtype38;
 }
 }
 if (!var36) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 12858);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 12610);
+show_backtrace(1);
 }
 var39 = NEW_parser_nodes__AStdClassdef(&type_parser_nodes__AStdClassdef);
 var40 = NULL;
 var41 = NULL;
 var42 = NULL;
 ((void (*)(val*, val*, val*, val*, val*, val*, val*, val*, val*, val*, val*, val*))(var39->class->vft[COLOR_parser_prod__AStdClassdef__init_astdclassdef]))(var39, var_pdocnode2, var40, var_pvisibilitynode4, var_pclasskindnode5, var_tclassidnode6, var_listnode8, var41, var42, var_listnode12, var_listnode14, var_tkwendnode15) /* init_astdclassdef on <var39:AStdClassdef>*/;
-CHECK_NEW_parser_nodes__AStdClassdef(var39);
 var_pclassdefnode1 = var39;
 var_node_list = var_pclassdefnode1;
 var43 = self->attrs[COLOR_parser__ReduceAction___goto].l; /* _goto on <self:ReduceAction273> */
@@ -910,15 +922,12 @@ var11 = ((val* (*)(val*))(var_p->class->vft[COLOR_parser__Parser__pop]))(var_p)
 var_nodearraylist1 = var11;
 var12 = NEW_array__Array(&type_array__Arraykernel__Object);
 ((void (*)(val*))(var12->class->vft[COLOR_array__Array__init]))(var12) /* init on <var12:Array[Object]>*/;
-CHECK_NEW_array__Array(var12);
 var_listnode8 = var12;
 var13 = NEW_array__Array(&type_array__Arraykernel__Object);
 ((void (*)(val*))(var13->class->vft[COLOR_array__Array__init]))(var13) /* init on <var13:Array[Object]>*/;
-CHECK_NEW_array__Array(var13);
 var_listnode12 = var13;
 var14 = NEW_array__Array(&type_array__Arraykernel__Object);
 ((void (*)(val*))(var14->class->vft[COLOR_array__Array__init]))(var14) /* init on <var14:Array[Object]>*/;
-CHECK_NEW_array__Array(var14);
 var_listnode14 = var14;
 var_pdocnode2 = var_nodearraylist1;
 /* <var_pdocnode2:nullable Object> isa nullable ADoc */
@@ -934,8 +943,9 @@ var15 = var_pdocnode2->type->type_table[cltype] == idtype;
 }
 }
 if (!var15) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 12896);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 12648);
+show_backtrace(1);
 }
 var_tkwredefnode3 = var_nodearraylist2;
 /* <var_tkwredefnode3:nullable Object> isa nullable TKwredef */
@@ -951,8 +961,9 @@ var16 = var_tkwredefnode3->type->type_table[cltype17] == idtype18;
 }
 }
 if (!var16) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 12898);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 12650);
+show_backtrace(1);
 }
 var_pvisibilitynode4 = var_nodearraylist3;
 /* <var_pvisibilitynode4:nullable Object> isa nullable AVisibility */
@@ -968,8 +979,9 @@ var19 = var_pvisibilitynode4->type->type_table[cltype20] == idtype21;
 }
 }
 if (!var19) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 12900);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 12652);
+show_backtrace(1);
 }
 var_pclasskindnode5 = var_nodearraylist4;
 /* <var_pclasskindnode5:nullable Object> isa nullable AClasskind */
@@ -985,8 +997,9 @@ var22 = var_pclasskindnode5->type->type_table[cltype23] == idtype24;
 }
 }
 if (!var22) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 12902);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 12654);
+show_backtrace(1);
 }
 var_tclassidnode6 = var_nodearraylist6;
 /* <var_tclassidnode6:nullable Object> isa nullable TClassid */
@@ -1002,8 +1015,9 @@ var25 = var_tclassidnode6->type->type_table[cltype26] == idtype27;
 }
 }
 if (!var25) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 12904);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 12656);
+show_backtrace(1);
 }
 var_listnode7 = var_nodearraylist7;
 /* <var_listnode7:nullable Object> isa Array[Object] */
@@ -1019,8 +1033,9 @@ var28 = var_listnode7->type->type_table[cltype29] == idtype30;
 }
 }
 if (!var28) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 12906);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 12658);
+show_backtrace(1);
 }
 var31 = ((val* (*)(val*, val*, val*))(self->class->vft[COLOR_parser__ReduceAction__concat]))(self, var_listnode8, var_listnode7) /* concat on <self:ReduceAction274>*/;
 var_listnode8 = var31;
@@ -1038,8 +1053,9 @@ var32 = var_listnode11->type->type_table[cltype33] == idtype34;
 }
 }
 if (!var32) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 12909);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 12661);
+show_backtrace(1);
 }
 var35 = ((val* (*)(val*, val*, val*))(self->class->vft[COLOR_parser__ReduceAction__concat]))(self, var_listnode12, var_listnode11) /* concat on <self:ReduceAction274>*/;
 var_listnode12 = var35;
@@ -1057,8 +1073,9 @@ var36 = var_listnode13->type->type_table[cltype37] == idtype38;
 }
 }
 if (!var36) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 12912);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 12664);
+show_backtrace(1);
 }
 var39 = ((val* (*)(val*, val*, val*))(self->class->vft[COLOR_parser__ReduceAction__concat]))(self, var_listnode14, var_listnode13) /* concat on <self:ReduceAction274>*/;
 var_listnode14 = var39;
@@ -1076,14 +1093,14 @@ var40 = var_tkwendnode15->type->type_table[cltype41] == idtype42;
 }
 }
 if (!var40) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 12915);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 12667);
+show_backtrace(1);
 }
 var43 = NEW_parser_nodes__AStdClassdef(&type_parser_nodes__AStdClassdef);
 var44 = NULL;
 var45 = NULL;
 ((void (*)(val*, val*, val*, val*, val*, val*, val*, val*, val*, val*, val*, val*))(var43->class->vft[COLOR_parser_prod__AStdClassdef__init_astdclassdef]))(var43, var_pdocnode2, var_tkwredefnode3, var_pvisibilitynode4, var_pclasskindnode5, var_tclassidnode6, var_listnode8, var44, var45, var_listnode12, var_listnode14, var_tkwendnode15) /* init_astdclassdef on <var43:AStdClassdef>*/;
-CHECK_NEW_parser_nodes__AStdClassdef(var43);
 var_pclassdefnode1 = var43;
 var_node_list = var_pclassdefnode1;
 var46 = self->attrs[COLOR_parser__ReduceAction___goto].l; /* _goto on <self:ReduceAction274> */
@@ -1198,15 +1215,12 @@ var11 = ((val* (*)(val*))(var_p->class->vft[COLOR_parser__Parser__pop]))(var_p)
 var_nodearraylist1 = var11;
 var12 = NEW_array__Array(&type_array__Arraykernel__Object);
 ((void (*)(val*))(var12->class->vft[COLOR_array__Array__init]))(var12) /* init on <var12:Array[Object]>*/;
-CHECK_NEW_array__Array(var12);
 var_listnode8 = var12;
 var13 = NEW_array__Array(&type_array__Arraykernel__Object);
 ((void (*)(val*))(var13->class->vft[COLOR_array__Array__init]))(var13) /* init on <var13:Array[Object]>*/;
-CHECK_NEW_array__Array(var13);
 var_listnode12 = var13;
 var14 = NEW_array__Array(&type_array__Arraykernel__Object);
 ((void (*)(val*))(var14->class->vft[COLOR_array__Array__init]))(var14) /* init on <var14:Array[Object]>*/;
-CHECK_NEW_array__Array(var14);
 var_listnode14 = var14;
 var_pdocnode2 = var_nodearraylist1;
 /* <var_pdocnode2:nullable Object> isa nullable ADoc */
@@ -1222,8 +1236,9 @@ var15 = var_pdocnode2->type->type_table[cltype] == idtype;
 }
 }
 if (!var15) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 12953);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 12705);
+show_backtrace(1);
 }
 var_pvisibilitynode4 = var_nodearraylist2;
 /* <var_pvisibilitynode4:nullable Object> isa nullable AVisibility */
@@ -1239,8 +1254,9 @@ var16 = var_pvisibilitynode4->type->type_table[cltype17] == idtype18;
 }
 }
 if (!var16) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 12955);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 12707);
+show_backtrace(1);
 }
 var_pclasskindnode5 = var_nodearraylist3;
 /* <var_pclasskindnode5:nullable Object> isa nullable AClasskind */
@@ -1256,8 +1272,9 @@ var19 = var_pclasskindnode5->type->type_table[cltype20] == idtype21;
 }
 }
 if (!var19) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 12957);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 12709);
+show_backtrace(1);
 }
 var_tclassidnode6 = var_nodearraylist6;
 /* <var_tclassidnode6:nullable Object> isa nullable TClassid */
@@ -1273,8 +1290,9 @@ var22 = var_tclassidnode6->type->type_table[cltype23] == idtype24;
 }
 }
 if (!var22) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 12959);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 12711);
+show_backtrace(1);
 }
 var_listnode7 = var_nodearraylist7;
 /* <var_listnode7:nullable Object> isa Array[Object] */
@@ -1290,8 +1308,9 @@ var25 = var_listnode7->type->type_table[cltype26] == idtype27;
 }
 }
 if (!var25) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 12961);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 12713);
+show_backtrace(1);
 }
 var28 = ((val* (*)(val*, val*, val*))(self->class->vft[COLOR_parser__ReduceAction__concat]))(self, var_listnode8, var_listnode7) /* concat on <self:ReduceAction275>*/;
 var_listnode8 = var28;
@@ -1309,8 +1328,9 @@ var29 = var_listnode11->type->type_table[cltype30] == idtype31;
 }
 }
 if (!var29) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 12964);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 12716);
+show_backtrace(1);
 }
 var32 = ((val* (*)(val*, val*, val*))(self->class->vft[COLOR_parser__ReduceAction__concat]))(self, var_listnode12, var_listnode11) /* concat on <self:ReduceAction275>*/;
 var_listnode12 = var32;
@@ -1328,8 +1348,9 @@ var33 = var_listnode13->type->type_table[cltype34] == idtype35;
 }
 }
 if (!var33) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 12967);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 12719);
+show_backtrace(1);
 }
 var36 = ((val* (*)(val*, val*, val*))(self->class->vft[COLOR_parser__ReduceAction__concat]))(self, var_listnode14, var_listnode13) /* concat on <self:ReduceAction275>*/;
 var_listnode14 = var36;
@@ -1347,15 +1368,15 @@ var37 = var_tkwendnode15->type->type_table[cltype38] == idtype39;
 }
 }
 if (!var37) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 12970);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 12722);
+show_backtrace(1);
 }
 var40 = NEW_parser_nodes__AStdClassdef(&type_parser_nodes__AStdClassdef);
 var41 = NULL;
 var42 = NULL;
 var43 = NULL;
 ((void (*)(val*, val*, val*, val*, val*, val*, val*, val*, val*, val*, val*, val*))(var40->class->vft[COLOR_parser_prod__AStdClassdef__init_astdclassdef]))(var40, var_pdocnode2, var41, var_pvisibilitynode4, var_pclasskindnode5, var_tclassidnode6, var_listnode8, var42, var43, var_listnode12, var_listnode14, var_tkwendnode15) /* init_astdclassdef on <var40:AStdClassdef>*/;
-CHECK_NEW_parser_nodes__AStdClassdef(var40);
 var_pclassdefnode1 = var40;
 var_node_list = var_pclassdefnode1;
 var44 = self->attrs[COLOR_parser__ReduceAction___goto].l; /* _goto on <self:ReduceAction275> */
@@ -1474,15 +1495,12 @@ var12 = ((val* (*)(val*))(var_p->class->vft[COLOR_parser__Parser__pop]))(var_p)
 var_nodearraylist1 = var12;
 var13 = NEW_array__Array(&type_array__Arraykernel__Object);
 ((void (*)(val*))(var13->class->vft[COLOR_array__Array__init]))(var13) /* init on <var13:Array[Object]>*/;
-CHECK_NEW_array__Array(var13);
 var_listnode8 = var13;
 var14 = NEW_array__Array(&type_array__Arraykernel__Object);
 ((void (*)(val*))(var14->class->vft[COLOR_array__Array__init]))(var14) /* init on <var14:Array[Object]>*/;
-CHECK_NEW_array__Array(var14);
 var_listnode12 = var14;
 var15 = NEW_array__Array(&type_array__Arraykernel__Object);
 ((void (*)(val*))(var15->class->vft[COLOR_array__Array__init]))(var15) /* init on <var15:Array[Object]>*/;
-CHECK_NEW_array__Array(var15);
 var_listnode14 = var15;
 var_pdocnode2 = var_nodearraylist1;
 /* <var_pdocnode2:nullable Object> isa nullable ADoc */
@@ -1498,8 +1516,9 @@ var16 = var_pdocnode2->type->type_table[cltype] == idtype;
 }
 }
 if (!var16) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13009);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 12761);
+show_backtrace(1);
 }
 var_pvisibilitynode4 = var_nodearraylist2;
 /* <var_pvisibilitynode4:nullable Object> isa nullable AVisibility */
@@ -1515,8 +1534,9 @@ var17 = var_pvisibilitynode4->type->type_table[cltype18] == idtype19;
 }
 }
 if (!var17) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13011);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 12763);
+show_backtrace(1);
 }
 var_pclasskindnode5 = var_nodearraylist3;
 /* <var_pclasskindnode5:nullable Object> isa nullable AClasskind */
@@ -1532,8 +1552,9 @@ var20 = var_pclasskindnode5->type->type_table[cltype21] == idtype22;
 }
 }
 if (!var20) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13013);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 12765);
+show_backtrace(1);
 }
 var_tclassidnode6 = var_nodearraylist7;
 /* <var_tclassidnode6:nullable Object> isa nullable TClassid */
@@ -1549,8 +1570,9 @@ var23 = var_tclassidnode6->type->type_table[cltype24] == idtype25;
 }
 }
 if (!var23) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13015);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 12767);
+show_backtrace(1);
 }
 var_listnode7 = var_nodearraylist8;
 /* <var_listnode7:nullable Object> isa Array[Object] */
@@ -1566,8 +1588,9 @@ var26 = var_listnode7->type->type_table[cltype27] == idtype28;
 }
 }
 if (!var26) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13017);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 12769);
+show_backtrace(1);
 }
 var29 = ((val* (*)(val*, val*, val*))(self->class->vft[COLOR_parser__ReduceAction__concat]))(self, var_listnode8, var_listnode7) /* concat on <self:ReduceAction276>*/;
 var_listnode8 = var29;
@@ -1585,8 +1608,9 @@ var30 = var_listnode11->type->type_table[cltype31] == idtype32;
 }
 }
 if (!var30) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13020);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 12772);
+show_backtrace(1);
 }
 var33 = ((val* (*)(val*, val*, val*))(self->class->vft[COLOR_parser__ReduceAction__concat]))(self, var_listnode12, var_listnode11) /* concat on <self:ReduceAction276>*/;
 var_listnode12 = var33;
@@ -1604,8 +1628,9 @@ var34 = var_listnode13->type->type_table[cltype35] == idtype36;
 }
 }
 if (!var34) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13023);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 12775);
+show_backtrace(1);
 }
 var37 = ((val* (*)(val*, val*, val*))(self->class->vft[COLOR_parser__ReduceAction__concat]))(self, var_listnode14, var_listnode13) /* concat on <self:ReduceAction276>*/;
 var_listnode14 = var37;
@@ -1623,15 +1648,15 @@ var38 = var_tkwendnode15->type->type_table[cltype39] == idtype40;
 }
 }
 if (!var38) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13026);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 12778);
+show_backtrace(1);
 }
 var41 = NEW_parser_nodes__AStdClassdef(&type_parser_nodes__AStdClassdef);
 var42 = NULL;
 var43 = NULL;
 var44 = NULL;
 ((void (*)(val*, val*, val*, val*, val*, val*, val*, val*, val*, val*, val*, val*))(var41->class->vft[COLOR_parser_prod__AStdClassdef__init_astdclassdef]))(var41, var_pdocnode2, var42, var_pvisibilitynode4, var_pclasskindnode5, var_tclassidnode6, var_listnode8, var43, var44, var_listnode12, var_listnode14, var_tkwendnode15) /* init_astdclassdef on <var41:AStdClassdef>*/;
-CHECK_NEW_parser_nodes__AStdClassdef(var41);
 var_pclassdefnode1 = var41;
 var_node_list = var_pclassdefnode1;
 var45 = self->attrs[COLOR_parser__ReduceAction___goto].l; /* _goto on <self:ReduceAction276> */
@@ -1753,15 +1778,12 @@ var12 = ((val* (*)(val*))(var_p->class->vft[COLOR_parser__Parser__pop]))(var_p)
 var_nodearraylist1 = var12;
 var13 = NEW_array__Array(&type_array__Arraykernel__Object);
 ((void (*)(val*))(var13->class->vft[COLOR_array__Array__init]))(var13) /* init on <var13:Array[Object]>*/;
-CHECK_NEW_array__Array(var13);
 var_listnode8 = var13;
 var14 = NEW_array__Array(&type_array__Arraykernel__Object);
 ((void (*)(val*))(var14->class->vft[COLOR_array__Array__init]))(var14) /* init on <var14:Array[Object]>*/;
-CHECK_NEW_array__Array(var14);
 var_listnode12 = var14;
 var15 = NEW_array__Array(&type_array__Arraykernel__Object);
 ((void (*)(val*))(var15->class->vft[COLOR_array__Array__init]))(var15) /* init on <var15:Array[Object]>*/;
-CHECK_NEW_array__Array(var15);
 var_listnode14 = var15;
 var_pdocnode2 = var_nodearraylist1;
 /* <var_pdocnode2:nullable Object> isa nullable ADoc */
@@ -1777,8 +1799,9 @@ var16 = var_pdocnode2->type->type_table[cltype] == idtype;
 }
 }
 if (!var16) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13065);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 12817);
+show_backtrace(1);
 }
 var_tkwredefnode3 = var_nodearraylist2;
 /* <var_tkwredefnode3:nullable Object> isa nullable TKwredef */
@@ -1794,8 +1817,9 @@ var17 = var_tkwredefnode3->type->type_table[cltype18] == idtype19;
 }
 }
 if (!var17) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13067);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 12819);
+show_backtrace(1);
 }
 var_pvisibilitynode4 = var_nodearraylist3;
 /* <var_pvisibilitynode4:nullable Object> isa nullable AVisibility */
@@ -1811,8 +1835,9 @@ var20 = var_pvisibilitynode4->type->type_table[cltype21] == idtype22;
 }
 }
 if (!var20) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13069);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 12821);
+show_backtrace(1);
 }
 var_pclasskindnode5 = var_nodearraylist4;
 /* <var_pclasskindnode5:nullable Object> isa nullable AClasskind */
@@ -1828,8 +1853,9 @@ var23 = var_pclasskindnode5->type->type_table[cltype24] == idtype25;
 }
 }
 if (!var23) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13071);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 12823);
+show_backtrace(1);
 }
 var_tclassidnode6 = var_nodearraylist7;
 /* <var_tclassidnode6:nullable Object> isa nullable TClassid */
@@ -1845,8 +1871,9 @@ var26 = var_tclassidnode6->type->type_table[cltype27] == idtype28;
 }
 }
 if (!var26) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13073);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 12825);
+show_backtrace(1);
 }
 var_listnode7 = var_nodearraylist8;
 /* <var_listnode7:nullable Object> isa Array[Object] */
@@ -1862,8 +1889,9 @@ var29 = var_listnode7->type->type_table[cltype30] == idtype31;
 }
 }
 if (!var29) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13075);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 12827);
+show_backtrace(1);
 }
 var32 = ((val* (*)(val*, val*, val*))(self->class->vft[COLOR_parser__ReduceAction__concat]))(self, var_listnode8, var_listnode7) /* concat on <self:ReduceAction278>*/;
 var_listnode8 = var32;
@@ -1881,8 +1909,9 @@ var33 = var_listnode11->type->type_table[cltype34] == idtype35;
 }
 }
 if (!var33) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13078);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 12830);
+show_backtrace(1);
 }
 var36 = ((val* (*)(val*, val*, val*))(self->class->vft[COLOR_parser__ReduceAction__concat]))(self, var_listnode12, var_listnode11) /* concat on <self:ReduceAction278>*/;
 var_listnode12 = var36;
@@ -1900,8 +1929,9 @@ var37 = var_listnode13->type->type_table[cltype38] == idtype39;
 }
 }
 if (!var37) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13081);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 12833);
+show_backtrace(1);
 }
 var40 = ((val* (*)(val*, val*, val*))(self->class->vft[COLOR_parser__ReduceAction__concat]))(self, var_listnode14, var_listnode13) /* concat on <self:ReduceAction278>*/;
 var_listnode14 = var40;
@@ -1919,14 +1949,14 @@ var41 = var_tkwendnode15->type->type_table[cltype42] == idtype43;
 }
 }
 if (!var41) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13084);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 12836);
+show_backtrace(1);
 }
 var44 = NEW_parser_nodes__AStdClassdef(&type_parser_nodes__AStdClassdef);
 var45 = NULL;
 var46 = NULL;
 ((void (*)(val*, val*, val*, val*, val*, val*, val*, val*, val*, val*, val*, val*))(var44->class->vft[COLOR_parser_prod__AStdClassdef__init_astdclassdef]))(var44, var_pdocnode2, var_tkwredefnode3, var_pvisibilitynode4, var_pclasskindnode5, var_tclassidnode6, var_listnode8, var45, var46, var_listnode12, var_listnode14, var_tkwendnode15) /* init_astdclassdef on <var44:AStdClassdef>*/;
-CHECK_NEW_parser_nodes__AStdClassdef(var44);
 var_pclassdefnode1 = var44;
 var_node_list = var_pclassdefnode1;
 var47 = self->attrs[COLOR_parser__ReduceAction___goto].l; /* _goto on <self:ReduceAction278> */
@@ -2052,15 +2082,12 @@ var13 = ((val* (*)(val*))(var_p->class->vft[COLOR_parser__Parser__pop]))(var_p)
 var_nodearraylist1 = var13;
 var14 = NEW_array__Array(&type_array__Arraykernel__Object);
 ((void (*)(val*))(var14->class->vft[COLOR_array__Array__init]))(var14) /* init on <var14:Array[Object]>*/;
-CHECK_NEW_array__Array(var14);
 var_listnode8 = var14;
 var15 = NEW_array__Array(&type_array__Arraykernel__Object);
 ((void (*)(val*))(var15->class->vft[COLOR_array__Array__init]))(var15) /* init on <var15:Array[Object]>*/;
-CHECK_NEW_array__Array(var15);
 var_listnode12 = var15;
 var16 = NEW_array__Array(&type_array__Arraykernel__Object);
 ((void (*)(val*))(var16->class->vft[COLOR_array__Array__init]))(var16) /* init on <var16:Array[Object]>*/;
-CHECK_NEW_array__Array(var16);
 var_listnode14 = var16;
 var_pdocnode2 = var_nodearraylist1;
 /* <var_pdocnode2:nullable Object> isa nullable ADoc */
@@ -2076,8 +2103,9 @@ var17 = var_pdocnode2->type->type_table[cltype] == idtype;
 }
 }
 if (!var17) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13124);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 12876);
+show_backtrace(1);
 }
 var_tkwredefnode3 = var_nodearraylist2;
 /* <var_tkwredefnode3:nullable Object> isa nullable TKwredef */
@@ -2093,8 +2121,9 @@ var18 = var_tkwredefnode3->type->type_table[cltype19] == idtype20;
 }
 }
 if (!var18) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13126);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 12878);
+show_backtrace(1);
 }
 var_pvisibilitynode4 = var_nodearraylist3;
 /* <var_pvisibilitynode4:nullable Object> isa nullable AVisibility */
@@ -2110,8 +2139,9 @@ var21 = var_pvisibilitynode4->type->type_table[cltype22] == idtype23;
 }
 }
 if (!var21) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13128);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 12880);
+show_backtrace(1);
 }
 var_pclasskindnode5 = var_nodearraylist4;
 /* <var_pclasskindnode5:nullable Object> isa nullable AClasskind */
@@ -2127,8 +2157,9 @@ var24 = var_pclasskindnode5->type->type_table[cltype25] == idtype26;
 }
 }
 if (!var24) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13130);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 12882);
+show_backtrace(1);
 }
 var_tclassidnode6 = var_nodearraylist8;
 /* <var_tclassidnode6:nullable Object> isa nullable TClassid */
@@ -2144,8 +2175,9 @@ var27 = var_tclassidnode6->type->type_table[cltype28] == idtype29;
 }
 }
 if (!var27) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13132);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 12884);
+show_backtrace(1);
 }
 var_listnode7 = var_nodearraylist9;
 /* <var_listnode7:nullable Object> isa Array[Object] */
@@ -2161,8 +2193,9 @@ var30 = var_listnode7->type->type_table[cltype31] == idtype32;
 }
 }
 if (!var30) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13134);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 12886);
+show_backtrace(1);
 }
 var33 = ((val* (*)(val*, val*, val*))(self->class->vft[COLOR_parser__ReduceAction__concat]))(self, var_listnode8, var_listnode7) /* concat on <self:ReduceAction279>*/;
 var_listnode8 = var33;
@@ -2180,8 +2213,9 @@ var34 = var_listnode11->type->type_table[cltype35] == idtype36;
 }
 }
 if (!var34) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13137);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 12889);
+show_backtrace(1);
 }
 var37 = ((val* (*)(val*, val*, val*))(self->class->vft[COLOR_parser__ReduceAction__concat]))(self, var_listnode12, var_listnode11) /* concat on <self:ReduceAction279>*/;
 var_listnode12 = var37;
@@ -2199,8 +2233,9 @@ var38 = var_listnode13->type->type_table[cltype39] == idtype40;
 }
 }
 if (!var38) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13140);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 12892);
+show_backtrace(1);
 }
 var41 = ((val* (*)(val*, val*, val*))(self->class->vft[COLOR_parser__ReduceAction__concat]))(self, var_listnode14, var_listnode13) /* concat on <self:ReduceAction279>*/;
 var_listnode14 = var41;
@@ -2218,14 +2253,14 @@ var42 = var_tkwendnode15->type->type_table[cltype43] == idtype44;
 }
 }
 if (!var42) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13143);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 12895);
+show_backtrace(1);
 }
 var45 = NEW_parser_nodes__AStdClassdef(&type_parser_nodes__AStdClassdef);
 var46 = NULL;
 var47 = NULL;
 ((void (*)(val*, val*, val*, val*, val*, val*, val*, val*, val*, val*, val*, val*))(var45->class->vft[COLOR_parser_prod__AStdClassdef__init_astdclassdef]))(var45, var_pdocnode2, var_tkwredefnode3, var_pvisibilitynode4, var_pclasskindnode5, var_tclassidnode6, var_listnode8, var46, var47, var_listnode12, var_listnode14, var_tkwendnode15) /* init_astdclassdef on <var45:AStdClassdef>*/;
-CHECK_NEW_parser_nodes__AStdClassdef(var45);
 var_pclassdefnode1 = var45;
 var_node_list = var_pclassdefnode1;
 var48 = self->attrs[COLOR_parser__ReduceAction___goto].l; /* _goto on <self:ReduceAction279> */
@@ -2342,15 +2377,12 @@ var10 = ((val* (*)(val*))(var_p->class->vft[COLOR_parser__Parser__pop]))(var_p)
 var_nodearraylist1 = var10;
 var11 = NEW_array__Array(&type_array__Arraykernel__Object);
 ((void (*)(val*))(var11->class->vft[COLOR_array__Array__init]))(var11) /* init on <var11:Array[Object]>*/;
-CHECK_NEW_array__Array(var11);
 var_listnode7 = var11;
 var12 = NEW_array__Array(&type_array__Arraykernel__Object);
 ((void (*)(val*))(var12->class->vft[COLOR_array__Array__init]))(var12) /* init on <var12:Array[Object]>*/;
-CHECK_NEW_array__Array(var12);
 var_listnode16 = var12;
 var13 = NEW_array__Array(&type_array__Arraykernel__Object);
 ((void (*)(val*))(var13->class->vft[COLOR_array__Array__init]))(var13) /* init on <var13:Array[Object]>*/;
-CHECK_NEW_array__Array(var13);
 var_listnode18 = var13;
 var_pdocnode2 = var_nodearraylist1;
 /* <var_pdocnode2:nullable Object> isa nullable ADoc */
@@ -2366,8 +2398,9 @@ var14 = var_pdocnode2->type->type_table[cltype] == idtype;
 }
 }
 if (!var14) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13180);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 12932);
+show_backtrace(1);
 }
 var_pvisibilitynode4 = var_nodearraylist2;
 /* <var_pvisibilitynode4:nullable Object> isa nullable AVisibility */
@@ -2383,8 +2416,9 @@ var15 = var_pvisibilitynode4->type->type_table[cltype16] == idtype17;
 }
 }
 if (!var15) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13182);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 12934);
+show_backtrace(1);
 }
 var_pclasskindnode5 = var_nodearraylist3;
 /* <var_pclasskindnode5:nullable Object> isa nullable AClasskind */
@@ -2400,8 +2434,9 @@ var18 = var_pclasskindnode5->type->type_table[cltype19] == idtype20;
 }
 }
 if (!var18) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13184);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 12936);
+show_backtrace(1);
 }
 var_tclassidnode6 = var_nodearraylist5;
 /* <var_tclassidnode6:nullable Object> isa nullable TClassid */
@@ -2417,12 +2452,12 @@ var21 = var_tclassidnode6->type->type_table[cltype22] == idtype23;
 }
 }
 if (!var21) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13186);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 12938);
+show_backtrace(1);
 }
 var24 = NEW_array__Array(&type_array__Arraykernel__Object);
 ((void (*)(val*))(var24->class->vft[COLOR_array__Array__init]))(var24) /* init on <var24:Array[Object]>*/;
-CHECK_NEW_array__Array(var24);
 var_listnode12 = var24;
 var_listnode11 = var_nodearraylist6;
 /* <var_listnode11:nullable Object> isa Array[Object] */
@@ -2438,8 +2473,9 @@ var25 = var_listnode11->type->type_table[cltype26] == idtype27;
 }
 }
 if (!var25) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13189);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 12941);
+show_backtrace(1);
 }
 var28 = ((val* (*)(val*, val*, val*))(self->class->vft[COLOR_parser__ReduceAction__concat]))(self, var_listnode12, var_listnode11) /* concat on <self:ReduceAction281>*/;
 var_listnode12 = var28;
@@ -2448,7 +2484,6 @@ var30 = NULL;
 var31 = NULL;
 var32 = NULL;
 ((void (*)(val*, val*, val*, val*, val*))(var29->class->vft[COLOR_parser_prod__AAnnotations__init_aannotations]))(var29, var30, var31, var_listnode12, var32) /* init_aannotations on <var29:AAnnotations>*/;
-CHECK_NEW_parser_nodes__AAnnotations(var29);
 var_pannotationsnode8 = var29;
 var_listnode15 = var_nodearraylist7;
 /* <var_listnode15:nullable Object> isa Array[Object] */
@@ -2464,8 +2499,9 @@ var33 = var_listnode15->type->type_table[cltype34] == idtype35;
 }
 }
 if (!var33) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13198);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 12950);
+show_backtrace(1);
 }
 var36 = ((val* (*)(val*, val*, val*))(self->class->vft[COLOR_parser__ReduceAction__concat]))(self, var_listnode16, var_listnode15) /* concat on <self:ReduceAction281>*/;
 var_listnode16 = var36;
@@ -2483,8 +2519,9 @@ var37 = var_listnode17->type->type_table[cltype38] == idtype39;
 }
 }
 if (!var37) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13201);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 12953);
+show_backtrace(1);
 }
 var40 = ((val* (*)(val*, val*, val*))(self->class->vft[COLOR_parser__ReduceAction__concat]))(self, var_listnode18, var_listnode17) /* concat on <self:ReduceAction281>*/;
 var_listnode18 = var40;
@@ -2502,14 +2539,14 @@ var41 = var_tkwendnode19->type->type_table[cltype42] == idtype43;
 }
 }
 if (!var41) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13204);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 12956);
+show_backtrace(1);
 }
 var44 = NEW_parser_nodes__AStdClassdef(&type_parser_nodes__AStdClassdef);
 var45 = NULL;
 var46 = NULL;
 ((void (*)(val*, val*, val*, val*, val*, val*, val*, val*, val*, val*, val*, val*))(var44->class->vft[COLOR_parser_prod__AStdClassdef__init_astdclassdef]))(var44, var_pdocnode2, var45, var_pvisibilitynode4, var_pclasskindnode5, var_tclassidnode6, var_listnode7, var_pannotationsnode8, var46, var_listnode16, var_listnode18, var_tkwendnode19) /* init_astdclassdef on <var44:AStdClassdef>*/;
-CHECK_NEW_parser_nodes__AStdClassdef(var44);
 var_pclassdefnode1 = var44;
 var_node_list = var_pclassdefnode1;
 var47 = self->attrs[COLOR_parser__ReduceAction___goto].l; /* _goto on <self:ReduceAction281> */
@@ -2633,15 +2670,12 @@ var11 = ((val* (*)(val*))(var_p->class->vft[COLOR_parser__Parser__pop]))(var_p)
 var_nodearraylist1 = var11;
 var12 = NEW_array__Array(&type_array__Arraykernel__Object);
 ((void (*)(val*))(var12->class->vft[COLOR_array__Array__init]))(var12) /* init on <var12:Array[Object]>*/;
-CHECK_NEW_array__Array(var12);
 var_listnode7 = var12;
 var13 = NEW_array__Array(&type_array__Arraykernel__Object);
 ((void (*)(val*))(var13->class->vft[COLOR_array__Array__init]))(var13) /* init on <var13:Array[Object]>*/;
-CHECK_NEW_array__Array(var13);
 var_listnode16 = var13;
 var14 = NEW_array__Array(&type_array__Arraykernel__Object);
 ((void (*)(val*))(var14->class->vft[COLOR_array__Array__init]))(var14) /* init on <var14:Array[Object]>*/;
-CHECK_NEW_array__Array(var14);
 var_listnode18 = var14;
 var_pdocnode2 = var_nodearraylist1;
 /* <var_pdocnode2:nullable Object> isa nullable ADoc */
@@ -2657,8 +2691,9 @@ var15 = var_pdocnode2->type->type_table[cltype] == idtype;
 }
 }
 if (!var15) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13242);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 12994);
+show_backtrace(1);
 }
 var_tkwredefnode3 = var_nodearraylist2;
 /* <var_tkwredefnode3:nullable Object> isa nullable TKwredef */
@@ -2674,8 +2709,9 @@ var16 = var_tkwredefnode3->type->type_table[cltype17] == idtype18;
 }
 }
 if (!var16) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13244);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 12996);
+show_backtrace(1);
 }
 var_pvisibilitynode4 = var_nodearraylist3;
 /* <var_pvisibilitynode4:nullable Object> isa nullable AVisibility */
@@ -2691,8 +2727,9 @@ var19 = var_pvisibilitynode4->type->type_table[cltype20] == idtype21;
 }
 }
 if (!var19) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13246);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 12998);
+show_backtrace(1);
 }
 var_pclasskindnode5 = var_nodearraylist4;
 /* <var_pclasskindnode5:nullable Object> isa nullable AClasskind */
@@ -2708,8 +2745,9 @@ var22 = var_pclasskindnode5->type->type_table[cltype23] == idtype24;
 }
 }
 if (!var22) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13248);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13000);
+show_backtrace(1);
 }
 var_tclassidnode6 = var_nodearraylist6;
 /* <var_tclassidnode6:nullable Object> isa nullable TClassid */
@@ -2725,12 +2763,12 @@ var25 = var_tclassidnode6->type->type_table[cltype26] == idtype27;
 }
 }
 if (!var25) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13250);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13002);
+show_backtrace(1);
 }
 var28 = NEW_array__Array(&type_array__Arraykernel__Object);
 ((void (*)(val*))(var28->class->vft[COLOR_array__Array__init]))(var28) /* init on <var28:Array[Object]>*/;
-CHECK_NEW_array__Array(var28);
 var_listnode12 = var28;
 var_listnode11 = var_nodearraylist7;
 /* <var_listnode11:nullable Object> isa Array[Object] */
@@ -2746,8 +2784,9 @@ var29 = var_listnode11->type->type_table[cltype30] == idtype31;
 }
 }
 if (!var29) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13253);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13005);
+show_backtrace(1);
 }
 var32 = ((val* (*)(val*, val*, val*))(self->class->vft[COLOR_parser__ReduceAction__concat]))(self, var_listnode12, var_listnode11) /* concat on <self:ReduceAction282>*/;
 var_listnode12 = var32;
@@ -2756,7 +2795,6 @@ var34 = NULL;
 var35 = NULL;
 var36 = NULL;
 ((void (*)(val*, val*, val*, val*, val*))(var33->class->vft[COLOR_parser_prod__AAnnotations__init_aannotations]))(var33, var34, var35, var_listnode12, var36) /* init_aannotations on <var33:AAnnotations>*/;
-CHECK_NEW_parser_nodes__AAnnotations(var33);
 var_pannotationsnode8 = var33;
 var_listnode15 = var_nodearraylist8;
 /* <var_listnode15:nullable Object> isa Array[Object] */
@@ -2772,8 +2810,9 @@ var37 = var_listnode15->type->type_table[cltype38] == idtype39;
 }
 }
 if (!var37) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13262);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13014);
+show_backtrace(1);
 }
 var40 = ((val* (*)(val*, val*, val*))(self->class->vft[COLOR_parser__ReduceAction__concat]))(self, var_listnode16, var_listnode15) /* concat on <self:ReduceAction282>*/;
 var_listnode16 = var40;
@@ -2791,8 +2830,9 @@ var41 = var_listnode17->type->type_table[cltype42] == idtype43;
 }
 }
 if (!var41) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13265);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13017);
+show_backtrace(1);
 }
 var44 = ((val* (*)(val*, val*, val*))(self->class->vft[COLOR_parser__ReduceAction__concat]))(self, var_listnode18, var_listnode17) /* concat on <self:ReduceAction282>*/;
 var_listnode18 = var44;
@@ -2810,13 +2850,13 @@ var45 = var_tkwendnode19->type->type_table[cltype46] == idtype47;
 }
 }
 if (!var45) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13268);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13020);
+show_backtrace(1);
 }
 var48 = NEW_parser_nodes__AStdClassdef(&type_parser_nodes__AStdClassdef);
 var49 = NULL;
 ((void (*)(val*, val*, val*, val*, val*, val*, val*, val*, val*, val*, val*, val*))(var48->class->vft[COLOR_parser_prod__AStdClassdef__init_astdclassdef]))(var48, var_pdocnode2, var_tkwredefnode3, var_pvisibilitynode4, var_pclasskindnode5, var_tclassidnode6, var_listnode7, var_pannotationsnode8, var49, var_listnode16, var_listnode18, var_tkwendnode19) /* init_astdclassdef on <var48:AStdClassdef>*/;
-CHECK_NEW_parser_nodes__AStdClassdef(var48);
 var_pclassdefnode1 = var48;
 var_node_list = var_pclassdefnode1;
 var50 = self->attrs[COLOR_parser__ReduceAction___goto].l; /* _goto on <self:ReduceAction282> */
@@ -2937,15 +2977,12 @@ var11 = ((val* (*)(val*))(var_p->class->vft[COLOR_parser__Parser__pop]))(var_p)
 var_nodearraylist1 = var11;
 var12 = NEW_array__Array(&type_array__Arraykernel__Object);
 ((void (*)(val*))(var12->class->vft[COLOR_array__Array__init]))(var12) /* init on <var12:Array[Object]>*/;
-CHECK_NEW_array__Array(var12);
 var_listnode7 = var12;
 var13 = NEW_array__Array(&type_array__Arraykernel__Object);
 ((void (*)(val*))(var13->class->vft[COLOR_array__Array__init]))(var13) /* init on <var13:Array[Object]>*/;
-CHECK_NEW_array__Array(var13);
 var_listnode16 = var13;
 var14 = NEW_array__Array(&type_array__Arraykernel__Object);
 ((void (*)(val*))(var14->class->vft[COLOR_array__Array__init]))(var14) /* init on <var14:Array[Object]>*/;
-CHECK_NEW_array__Array(var14);
 var_listnode18 = var14;
 var_pdocnode2 = var_nodearraylist1;
 /* <var_pdocnode2:nullable Object> isa nullable ADoc */
@@ -2961,8 +2998,9 @@ var15 = var_pdocnode2->type->type_table[cltype] == idtype;
 }
 }
 if (!var15) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13306);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13058);
+show_backtrace(1);
 }
 var_pvisibilitynode4 = var_nodearraylist2;
 /* <var_pvisibilitynode4:nullable Object> isa nullable AVisibility */
@@ -2978,8 +3016,9 @@ var16 = var_pvisibilitynode4->type->type_table[cltype17] == idtype18;
 }
 }
 if (!var16) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13308);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13060);
+show_backtrace(1);
 }
 var_pclasskindnode5 = var_nodearraylist3;
 /* <var_pclasskindnode5:nullable Object> isa nullable AClasskind */
@@ -2995,8 +3034,9 @@ var19 = var_pclasskindnode5->type->type_table[cltype20] == idtype21;
 }
 }
 if (!var19) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13310);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13062);
+show_backtrace(1);
 }
 var_tclassidnode6 = var_nodearraylist6;
 /* <var_tclassidnode6:nullable Object> isa nullable TClassid */
@@ -3012,12 +3052,12 @@ var22 = var_tclassidnode6->type->type_table[cltype23] == idtype24;
 }
 }
 if (!var22) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13312);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13064);
+show_backtrace(1);
 }
 var25 = NEW_array__Array(&type_array__Arraykernel__Object);
 ((void (*)(val*))(var25->class->vft[COLOR_array__Array__init]))(var25) /* init on <var25:Array[Object]>*/;
-CHECK_NEW_array__Array(var25);
 var_listnode12 = var25;
 var_listnode11 = var_nodearraylist7;
 /* <var_listnode11:nullable Object> isa Array[Object] */
@@ -3033,8 +3073,9 @@ var26 = var_listnode11->type->type_table[cltype27] == idtype28;
 }
 }
 if (!var26) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13315);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13067);
+show_backtrace(1);
 }
 var29 = ((val* (*)(val*, val*, val*))(self->class->vft[COLOR_parser__ReduceAction__concat]))(self, var_listnode12, var_listnode11) /* concat on <self:ReduceAction283>*/;
 var_listnode12 = var29;
@@ -3043,7 +3084,6 @@ var31 = NULL;
 var32 = NULL;
 var33 = NULL;
 ((void (*)(val*, val*, val*, val*, val*))(var30->class->vft[COLOR_parser_prod__AAnnotations__init_aannotations]))(var30, var31, var32, var_listnode12, var33) /* init_aannotations on <var30:AAnnotations>*/;
-CHECK_NEW_parser_nodes__AAnnotations(var30);
 var_pannotationsnode8 = var30;
 var_listnode15 = var_nodearraylist8;
 /* <var_listnode15:nullable Object> isa Array[Object] */
@@ -3059,8 +3099,9 @@ var34 = var_listnode15->type->type_table[cltype35] == idtype36;
 }
 }
 if (!var34) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13324);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13076);
+show_backtrace(1);
 }
 var37 = ((val* (*)(val*, val*, val*))(self->class->vft[COLOR_parser__ReduceAction__concat]))(self, var_listnode16, var_listnode15) /* concat on <self:ReduceAction283>*/;
 var_listnode16 = var37;
@@ -3078,8 +3119,9 @@ var38 = var_listnode17->type->type_table[cltype39] == idtype40;
 }
 }
 if (!var38) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13327);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13079);
+show_backtrace(1);
 }
 var41 = ((val* (*)(val*, val*, val*))(self->class->vft[COLOR_parser__ReduceAction__concat]))(self, var_listnode18, var_listnode17) /* concat on <self:ReduceAction283>*/;
 var_listnode18 = var41;
@@ -3097,14 +3139,14 @@ var42 = var_tkwendnode19->type->type_table[cltype43] == idtype44;
 }
 }
 if (!var42) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13330);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13082);
+show_backtrace(1);
 }
 var45 = NEW_parser_nodes__AStdClassdef(&type_parser_nodes__AStdClassdef);
 var46 = NULL;
 var47 = NULL;
 ((void (*)(val*, val*, val*, val*, val*, val*, val*, val*, val*, val*, val*, val*))(var45->class->vft[COLOR_parser_prod__AStdClassdef__init_astdclassdef]))(var45, var_pdocnode2, var46, var_pvisibilitynode4, var_pclasskindnode5, var_tclassidnode6, var_listnode7, var_pannotationsnode8, var47, var_listnode16, var_listnode18, var_tkwendnode19) /* init_astdclassdef on <var45:AStdClassdef>*/;
-CHECK_NEW_parser_nodes__AStdClassdef(var45);
 var_pclassdefnode1 = var45;
 var_node_list = var_pclassdefnode1;
 var48 = self->attrs[COLOR_parser__ReduceAction___goto].l; /* _goto on <self:ReduceAction283> */
@@ -3229,15 +3271,12 @@ var12 = ((val* (*)(val*))(var_p->class->vft[COLOR_parser__Parser__pop]))(var_p)
 var_nodearraylist1 = var12;
 var13 = NEW_array__Array(&type_array__Arraykernel__Object);
 ((void (*)(val*))(var13->class->vft[COLOR_array__Array__init]))(var13) /* init on <var13:Array[Object]>*/;
-CHECK_NEW_array__Array(var13);
 var_listnode7 = var13;
 var14 = NEW_array__Array(&type_array__Arraykernel__Object);
 ((void (*)(val*))(var14->class->vft[COLOR_array__Array__init]))(var14) /* init on <var14:Array[Object]>*/;
-CHECK_NEW_array__Array(var14);
 var_listnode16 = var14;
 var15 = NEW_array__Array(&type_array__Arraykernel__Object);
 ((void (*)(val*))(var15->class->vft[COLOR_array__Array__init]))(var15) /* init on <var15:Array[Object]>*/;
-CHECK_NEW_array__Array(var15);
 var_listnode18 = var15;
 var_pdocnode2 = var_nodearraylist1;
 /* <var_pdocnode2:nullable Object> isa nullable ADoc */
@@ -3253,8 +3292,9 @@ var16 = var_pdocnode2->type->type_table[cltype] == idtype;
 }
 }
 if (!var16) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13369);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13121);
+show_backtrace(1);
 }
 var_pvisibilitynode4 = var_nodearraylist2;
 /* <var_pvisibilitynode4:nullable Object> isa nullable AVisibility */
@@ -3270,8 +3310,9 @@ var17 = var_pvisibilitynode4->type->type_table[cltype18] == idtype19;
 }
 }
 if (!var17) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13371);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13123);
+show_backtrace(1);
 }
 var_pclasskindnode5 = var_nodearraylist3;
 /* <var_pclasskindnode5:nullable Object> isa nullable AClasskind */
@@ -3287,8 +3328,9 @@ var20 = var_pclasskindnode5->type->type_table[cltype21] == idtype22;
 }
 }
 if (!var20) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13373);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13125);
+show_backtrace(1);
 }
 var_tclassidnode6 = var_nodearraylist7;
 /* <var_tclassidnode6:nullable Object> isa nullable TClassid */
@@ -3304,12 +3346,12 @@ var23 = var_tclassidnode6->type->type_table[cltype24] == idtype25;
 }
 }
 if (!var23) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13375);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13127);
+show_backtrace(1);
 }
 var26 = NEW_array__Array(&type_array__Arraykernel__Object);
 ((void (*)(val*))(var26->class->vft[COLOR_array__Array__init]))(var26) /* init on <var26:Array[Object]>*/;
-CHECK_NEW_array__Array(var26);
 var_listnode12 = var26;
 var_listnode11 = var_nodearraylist8;
 /* <var_listnode11:nullable Object> isa Array[Object] */
@@ -3325,8 +3367,9 @@ var27 = var_listnode11->type->type_table[cltype28] == idtype29;
 }
 }
 if (!var27) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13378);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13130);
+show_backtrace(1);
 }
 var30 = ((val* (*)(val*, val*, val*))(self->class->vft[COLOR_parser__ReduceAction__concat]))(self, var_listnode12, var_listnode11) /* concat on <self:ReduceAction284>*/;
 var_listnode12 = var30;
@@ -3335,7 +3378,6 @@ var32 = NULL;
 var33 = NULL;
 var34 = NULL;
 ((void (*)(val*, val*, val*, val*, val*))(var31->class->vft[COLOR_parser_prod__AAnnotations__init_aannotations]))(var31, var32, var33, var_listnode12, var34) /* init_aannotations on <var31:AAnnotations>*/;
-CHECK_NEW_parser_nodes__AAnnotations(var31);
 var_pannotationsnode8 = var31;
 var_listnode15 = var_nodearraylist9;
 /* <var_listnode15:nullable Object> isa Array[Object] */
@@ -3351,8 +3393,9 @@ var35 = var_listnode15->type->type_table[cltype36] == idtype37;
 }
 }
 if (!var35) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13387);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13139);
+show_backtrace(1);
 }
 var38 = ((val* (*)(val*, val*, val*))(self->class->vft[COLOR_parser__ReduceAction__concat]))(self, var_listnode16, var_listnode15) /* concat on <self:ReduceAction284>*/;
 var_listnode16 = var38;
@@ -3370,8 +3413,9 @@ var39 = var_listnode17->type->type_table[cltype40] == idtype41;
 }
 }
 if (!var39) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13390);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13142);
+show_backtrace(1);
 }
 var42 = ((val* (*)(val*, val*, val*))(self->class->vft[COLOR_parser__ReduceAction__concat]))(self, var_listnode18, var_listnode17) /* concat on <self:ReduceAction284>*/;
 var_listnode18 = var42;
@@ -3389,14 +3433,14 @@ var43 = var_tkwendnode19->type->type_table[cltype44] == idtype45;
 }
 }
 if (!var43) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13393);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13145);
+show_backtrace(1);
 }
 var46 = NEW_parser_nodes__AStdClassdef(&type_parser_nodes__AStdClassdef);
 var47 = NULL;
 var48 = NULL;
 ((void (*)(val*, val*, val*, val*, val*, val*, val*, val*, val*, val*, val*, val*))(var46->class->vft[COLOR_parser_prod__AStdClassdef__init_astdclassdef]))(var46, var_pdocnode2, var47, var_pvisibilitynode4, var_pclasskindnode5, var_tclassidnode6, var_listnode7, var_pannotationsnode8, var48, var_listnode16, var_listnode18, var_tkwendnode19) /* init_astdclassdef on <var46:AStdClassdef>*/;
-CHECK_NEW_parser_nodes__AStdClassdef(var46);
 var_pclassdefnode1 = var46;
 var_node_list = var_pclassdefnode1;
 var49 = self->attrs[COLOR_parser__ReduceAction___goto].l; /* _goto on <self:ReduceAction284> */
@@ -3524,15 +3568,12 @@ var12 = ((val* (*)(val*))(var_p->class->vft[COLOR_parser__Parser__pop]))(var_p)
 var_nodearraylist1 = var12;
 var13 = NEW_array__Array(&type_array__Arraykernel__Object);
 ((void (*)(val*))(var13->class->vft[COLOR_array__Array__init]))(var13) /* init on <var13:Array[Object]>*/;
-CHECK_NEW_array__Array(var13);
 var_listnode7 = var13;
 var14 = NEW_array__Array(&type_array__Arraykernel__Object);
 ((void (*)(val*))(var14->class->vft[COLOR_array__Array__init]))(var14) /* init on <var14:Array[Object]>*/;
-CHECK_NEW_array__Array(var14);
 var_listnode16 = var14;
 var15 = NEW_array__Array(&type_array__Arraykernel__Object);
 ((void (*)(val*))(var15->class->vft[COLOR_array__Array__init]))(var15) /* init on <var15:Array[Object]>*/;
-CHECK_NEW_array__Array(var15);
 var_listnode18 = var15;
 var_pdocnode2 = var_nodearraylist1;
 /* <var_pdocnode2:nullable Object> isa nullable ADoc */
@@ -3548,8 +3589,9 @@ var16 = var_pdocnode2->type->type_table[cltype] == idtype;
 }
 }
 if (!var16) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13432);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13184);
+show_backtrace(1);
 }
 var_tkwredefnode3 = var_nodearraylist2;
 /* <var_tkwredefnode3:nullable Object> isa nullable TKwredef */
@@ -3565,8 +3607,9 @@ var17 = var_tkwredefnode3->type->type_table[cltype18] == idtype19;
 }
 }
 if (!var17) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13434);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13186);
+show_backtrace(1);
 }
 var_pvisibilitynode4 = var_nodearraylist3;
 /* <var_pvisibilitynode4:nullable Object> isa nullable AVisibility */
@@ -3582,8 +3625,9 @@ var20 = var_pvisibilitynode4->type->type_table[cltype21] == idtype22;
 }
 }
 if (!var20) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13436);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13188);
+show_backtrace(1);
 }
 var_pclasskindnode5 = var_nodearraylist4;
 /* <var_pclasskindnode5:nullable Object> isa nullable AClasskind */
@@ -3599,8 +3643,9 @@ var23 = var_pclasskindnode5->type->type_table[cltype24] == idtype25;
 }
 }
 if (!var23) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13438);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13190);
+show_backtrace(1);
 }
 var_tclassidnode6 = var_nodearraylist7;
 /* <var_tclassidnode6:nullable Object> isa nullable TClassid */
@@ -3616,12 +3661,12 @@ var26 = var_tclassidnode6->type->type_table[cltype27] == idtype28;
 }
 }
 if (!var26) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13440);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13192);
+show_backtrace(1);
 }
 var29 = NEW_array__Array(&type_array__Arraykernel__Object);
 ((void (*)(val*))(var29->class->vft[COLOR_array__Array__init]))(var29) /* init on <var29:Array[Object]>*/;
-CHECK_NEW_array__Array(var29);
 var_listnode12 = var29;
 var_listnode11 = var_nodearraylist8;
 /* <var_listnode11:nullable Object> isa Array[Object] */
@@ -3637,8 +3682,9 @@ var30 = var_listnode11->type->type_table[cltype31] == idtype32;
 }
 }
 if (!var30) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13443);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13195);
+show_backtrace(1);
 }
 var33 = ((val* (*)(val*, val*, val*))(self->class->vft[COLOR_parser__ReduceAction__concat]))(self, var_listnode12, var_listnode11) /* concat on <self:ReduceAction286>*/;
 var_listnode12 = var33;
@@ -3647,7 +3693,6 @@ var35 = NULL;
 var36 = NULL;
 var37 = NULL;
 ((void (*)(val*, val*, val*, val*, val*))(var34->class->vft[COLOR_parser_prod__AAnnotations__init_aannotations]))(var34, var35, var36, var_listnode12, var37) /* init_aannotations on <var34:AAnnotations>*/;
-CHECK_NEW_parser_nodes__AAnnotations(var34);
 var_pannotationsnode8 = var34;
 var_listnode15 = var_nodearraylist9;
 /* <var_listnode15:nullable Object> isa Array[Object] */
@@ -3663,8 +3708,9 @@ var38 = var_listnode15->type->type_table[cltype39] == idtype40;
 }
 }
 if (!var38) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13452);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13204);
+show_backtrace(1);
 }
 var41 = ((val* (*)(val*, val*, val*))(self->class->vft[COLOR_parser__ReduceAction__concat]))(self, var_listnode16, var_listnode15) /* concat on <self:ReduceAction286>*/;
 var_listnode16 = var41;
@@ -3682,8 +3728,9 @@ var42 = var_listnode17->type->type_table[cltype43] == idtype44;
 }
 }
 if (!var42) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13455);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13207);
+show_backtrace(1);
 }
 var45 = ((val* (*)(val*, val*, val*))(self->class->vft[COLOR_parser__ReduceAction__concat]))(self, var_listnode18, var_listnode17) /* concat on <self:ReduceAction286>*/;
 var_listnode18 = var45;
@@ -3701,13 +3748,13 @@ var46 = var_tkwendnode19->type->type_table[cltype47] == idtype48;
 }
 }
 if (!var46) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13458);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13210);
+show_backtrace(1);
 }
 var49 = NEW_parser_nodes__AStdClassdef(&type_parser_nodes__AStdClassdef);
 var50 = NULL;
 ((void (*)(val*, val*, val*, val*, val*, val*, val*, val*, val*, val*, val*, val*))(var49->class->vft[COLOR_parser_prod__AStdClassdef__init_astdclassdef]))(var49, var_pdocnode2, var_tkwredefnode3, var_pvisibilitynode4, var_pclasskindnode5, var_tclassidnode6, var_listnode7, var_pannotationsnode8, var50, var_listnode16, var_listnode18, var_tkwendnode19) /* init_astdclassdef on <var49:AStdClassdef>*/;
-CHECK_NEW_parser_nodes__AStdClassdef(var49);
 var_pclassdefnode1 = var49;
 var_node_list = var_pclassdefnode1;
 var51 = self->attrs[COLOR_parser__ReduceAction___goto].l; /* _goto on <self:ReduceAction286> */
@@ -3839,15 +3886,12 @@ var13 = ((val* (*)(val*))(var_p->class->vft[COLOR_parser__Parser__pop]))(var_p)
 var_nodearraylist1 = var13;
 var14 = NEW_array__Array(&type_array__Arraykernel__Object);
 ((void (*)(val*))(var14->class->vft[COLOR_array__Array__init]))(var14) /* init on <var14:Array[Object]>*/;
-CHECK_NEW_array__Array(var14);
 var_listnode7 = var14;
 var15 = NEW_array__Array(&type_array__Arraykernel__Object);
 ((void (*)(val*))(var15->class->vft[COLOR_array__Array__init]))(var15) /* init on <var15:Array[Object]>*/;
-CHECK_NEW_array__Array(var15);
 var_listnode16 = var15;
 var16 = NEW_array__Array(&type_array__Arraykernel__Object);
 ((void (*)(val*))(var16->class->vft[COLOR_array__Array__init]))(var16) /* init on <var16:Array[Object]>*/;
-CHECK_NEW_array__Array(var16);
 var_listnode18 = var16;
 var_pdocnode2 = var_nodearraylist1;
 /* <var_pdocnode2:nullable Object> isa nullable ADoc */
@@ -3863,8 +3907,9 @@ var17 = var_pdocnode2->type->type_table[cltype] == idtype;
 }
 }
 if (!var17) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13498);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13250);
+show_backtrace(1);
 }
 var_tkwredefnode3 = var_nodearraylist2;
 /* <var_tkwredefnode3:nullable Object> isa nullable TKwredef */
@@ -3880,8 +3925,9 @@ var18 = var_tkwredefnode3->type->type_table[cltype19] == idtype20;
 }
 }
 if (!var18) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13500);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13252);
+show_backtrace(1);
 }
 var_pvisibilitynode4 = var_nodearraylist3;
 /* <var_pvisibilitynode4:nullable Object> isa nullable AVisibility */
@@ -3897,8 +3943,9 @@ var21 = var_pvisibilitynode4->type->type_table[cltype22] == idtype23;
 }
 }
 if (!var21) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13502);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13254);
+show_backtrace(1);
 }
 var_pclasskindnode5 = var_nodearraylist4;
 /* <var_pclasskindnode5:nullable Object> isa nullable AClasskind */
@@ -3914,8 +3961,9 @@ var24 = var_pclasskindnode5->type->type_table[cltype25] == idtype26;
 }
 }
 if (!var24) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13504);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13256);
+show_backtrace(1);
 }
 var_tclassidnode6 = var_nodearraylist8;
 /* <var_tclassidnode6:nullable Object> isa nullable TClassid */
@@ -3931,12 +3979,12 @@ var27 = var_tclassidnode6->type->type_table[cltype28] == idtype29;
 }
 }
 if (!var27) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13506);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13258);
+show_backtrace(1);
 }
 var30 = NEW_array__Array(&type_array__Arraykernel__Object);
 ((void (*)(val*))(var30->class->vft[COLOR_array__Array__init]))(var30) /* init on <var30:Array[Object]>*/;
-CHECK_NEW_array__Array(var30);
 var_listnode12 = var30;
 var_listnode11 = var_nodearraylist9;
 /* <var_listnode11:nullable Object> isa Array[Object] */
@@ -3952,8 +4000,9 @@ var31 = var_listnode11->type->type_table[cltype32] == idtype33;
 }
 }
 if (!var31) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13509);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13261);
+show_backtrace(1);
 }
 var34 = ((val* (*)(val*, val*, val*))(self->class->vft[COLOR_parser__ReduceAction__concat]))(self, var_listnode12, var_listnode11) /* concat on <self:ReduceAction287>*/;
 var_listnode12 = var34;
@@ -3962,7 +4011,6 @@ var36 = NULL;
 var37 = NULL;
 var38 = NULL;
 ((void (*)(val*, val*, val*, val*, val*))(var35->class->vft[COLOR_parser_prod__AAnnotations__init_aannotations]))(var35, var36, var37, var_listnode12, var38) /* init_aannotations on <var35:AAnnotations>*/;
-CHECK_NEW_parser_nodes__AAnnotations(var35);
 var_pannotationsnode8 = var35;
 var_listnode15 = var_nodearraylist10;
 /* <var_listnode15:nullable Object> isa Array[Object] */
@@ -3978,8 +4026,9 @@ var39 = var_listnode15->type->type_table[cltype40] == idtype41;
 }
 }
 if (!var39) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13518);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13270);
+show_backtrace(1);
 }
 var42 = ((val* (*)(val*, val*, val*))(self->class->vft[COLOR_parser__ReduceAction__concat]))(self, var_listnode16, var_listnode15) /* concat on <self:ReduceAction287>*/;
 var_listnode16 = var42;
@@ -3997,8 +4046,9 @@ var43 = var_listnode17->type->type_table[cltype44] == idtype45;
 }
 }
 if (!var43) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13521);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13273);
+show_backtrace(1);
 }
 var46 = ((val* (*)(val*, val*, val*))(self->class->vft[COLOR_parser__ReduceAction__concat]))(self, var_listnode18, var_listnode17) /* concat on <self:ReduceAction287>*/;
 var_listnode18 = var46;
@@ -4016,13 +4066,13 @@ var47 = var_tkwendnode19->type->type_table[cltype48] == idtype49;
 }
 }
 if (!var47) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13524);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13276);
+show_backtrace(1);
 }
 var50 = NEW_parser_nodes__AStdClassdef(&type_parser_nodes__AStdClassdef);
 var51 = NULL;
 ((void (*)(val*, val*, val*, val*, val*, val*, val*, val*, val*, val*, val*, val*))(var50->class->vft[COLOR_parser_prod__AStdClassdef__init_astdclassdef]))(var50, var_pdocnode2, var_tkwredefnode3, var_pvisibilitynode4, var_pclasskindnode5, var_tclassidnode6, var_listnode7, var_pannotationsnode8, var51, var_listnode16, var_listnode18, var_tkwendnode19) /* init_astdclassdef on <var50:AStdClassdef>*/;
-CHECK_NEW_parser_nodes__AStdClassdef(var50);
 var_pclassdefnode1 = var50;
 var_node_list = var_pclassdefnode1;
 var52 = self->attrs[COLOR_parser__ReduceAction___goto].l; /* _goto on <self:ReduceAction287> */
@@ -4148,15 +4198,12 @@ var11 = ((val* (*)(val*))(var_p->class->vft[COLOR_parser__Parser__pop]))(var_p)
 var_nodearraylist1 = var11;
 var12 = NEW_array__Array(&type_array__Arraykernel__Object);
 ((void (*)(val*))(var12->class->vft[COLOR_array__Array__init]))(var12) /* init on <var12:Array[Object]>*/;
-CHECK_NEW_array__Array(var12);
 var_listnode8 = var12;
 var13 = NEW_array__Array(&type_array__Arraykernel__Object);
 ((void (*)(val*))(var13->class->vft[COLOR_array__Array__init]))(var13) /* init on <var13:Array[Object]>*/;
-CHECK_NEW_array__Array(var13);
 var_listnode17 = var13;
 var14 = NEW_array__Array(&type_array__Arraykernel__Object);
 ((void (*)(val*))(var14->class->vft[COLOR_array__Array__init]))(var14) /* init on <var14:Array[Object]>*/;
-CHECK_NEW_array__Array(var14);
 var_listnode19 = var14;
 var_pdocnode2 = var_nodearraylist1;
 /* <var_pdocnode2:nullable Object> isa nullable ADoc */
@@ -4172,8 +4219,9 @@ var15 = var_pdocnode2->type->type_table[cltype] == idtype;
 }
 }
 if (!var15) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13562);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13314);
+show_backtrace(1);
 }
 var_pvisibilitynode4 = var_nodearraylist2;
 /* <var_pvisibilitynode4:nullable Object> isa nullable AVisibility */
@@ -4189,8 +4237,9 @@ var16 = var_pvisibilitynode4->type->type_table[cltype17] == idtype18;
 }
 }
 if (!var16) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13564);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13316);
+show_backtrace(1);
 }
 var_pclasskindnode5 = var_nodearraylist3;
 /* <var_pclasskindnode5:nullable Object> isa nullable AClasskind */
@@ -4206,8 +4255,9 @@ var19 = var_pclasskindnode5->type->type_table[cltype20] == idtype21;
 }
 }
 if (!var19) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13566);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13318);
+show_backtrace(1);
 }
 var_tclassidnode6 = var_nodearraylist5;
 /* <var_tclassidnode6:nullable Object> isa nullable TClassid */
@@ -4223,8 +4273,9 @@ var22 = var_tclassidnode6->type->type_table[cltype23] == idtype24;
 }
 }
 if (!var22) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13568);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13320);
+show_backtrace(1);
 }
 var_listnode7 = var_nodearraylist6;
 /* <var_listnode7:nullable Object> isa Array[Object] */
@@ -4240,14 +4291,14 @@ var25 = var_listnode7->type->type_table[cltype26] == idtype27;
 }
 }
 if (!var25) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13570);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13322);
+show_backtrace(1);
 }
 var28 = ((val* (*)(val*, val*, val*))(self->class->vft[COLOR_parser__ReduceAction__concat]))(self, var_listnode8, var_listnode7) /* concat on <self:ReduceAction289>*/;
 var_listnode8 = var28;
 var29 = NEW_array__Array(&type_array__Arraykernel__Object);
 ((void (*)(val*))(var29->class->vft[COLOR_array__Array__init]))(var29) /* init on <var29:Array[Object]>*/;
-CHECK_NEW_array__Array(var29);
 var_listnode13 = var29;
 var_listnode12 = var_nodearraylist7;
 /* <var_listnode12:nullable Object> isa Array[Object] */
@@ -4263,8 +4314,9 @@ var30 = var_listnode12->type->type_table[cltype31] == idtype32;
 }
 }
 if (!var30) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13574);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13326);
+show_backtrace(1);
 }
 var33 = ((val* (*)(val*, val*, val*))(self->class->vft[COLOR_parser__ReduceAction__concat]))(self, var_listnode13, var_listnode12) /* concat on <self:ReduceAction289>*/;
 var_listnode13 = var33;
@@ -4273,7 +4325,6 @@ var35 = NULL;
 var36 = NULL;
 var37 = NULL;
 ((void (*)(val*, val*, val*, val*, val*))(var34->class->vft[COLOR_parser_prod__AAnnotations__init_aannotations]))(var34, var35, var36, var_listnode13, var37) /* init_aannotations on <var34:AAnnotations>*/;
-CHECK_NEW_parser_nodes__AAnnotations(var34);
 var_pannotationsnode9 = var34;
 var_listnode16 = var_nodearraylist8;
 /* <var_listnode16:nullable Object> isa Array[Object] */
@@ -4289,8 +4340,9 @@ var38 = var_listnode16->type->type_table[cltype39] == idtype40;
 }
 }
 if (!var38) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13583);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13335);
+show_backtrace(1);
 }
 var41 = ((val* (*)(val*, val*, val*))(self->class->vft[COLOR_parser__ReduceAction__concat]))(self, var_listnode17, var_listnode16) /* concat on <self:ReduceAction289>*/;
 var_listnode17 = var41;
@@ -4308,8 +4360,9 @@ var42 = var_listnode18->type->type_table[cltype43] == idtype44;
 }
 }
 if (!var42) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13586);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13338);
+show_backtrace(1);
 }
 var45 = ((val* (*)(val*, val*, val*))(self->class->vft[COLOR_parser__ReduceAction__concat]))(self, var_listnode19, var_listnode18) /* concat on <self:ReduceAction289>*/;
 var_listnode19 = var45;
@@ -4327,14 +4380,14 @@ var46 = var_tkwendnode20->type->type_table[cltype47] == idtype48;
 }
 }
 if (!var46) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13589);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13341);
+show_backtrace(1);
 }
 var49 = NEW_parser_nodes__AStdClassdef(&type_parser_nodes__AStdClassdef);
 var50 = NULL;
 var51 = NULL;
 ((void (*)(val*, val*, val*, val*, val*, val*, val*, val*, val*, val*, val*, val*))(var49->class->vft[COLOR_parser_prod__AStdClassdef__init_astdclassdef]))(var49, var_pdocnode2, var50, var_pvisibilitynode4, var_pclasskindnode5, var_tclassidnode6, var_listnode8, var_pannotationsnode9, var51, var_listnode17, var_listnode19, var_tkwendnode20) /* init_astdclassdef on <var49:AStdClassdef>*/;
-CHECK_NEW_parser_nodes__AStdClassdef(var49);
 var_pclassdefnode1 = var49;
 var_node_list = var_pclassdefnode1;
 var52 = self->attrs[COLOR_parser__ReduceAction___goto].l; /* _goto on <self:ReduceAction289> */
@@ -4467,15 +4520,12 @@ var12 = ((val* (*)(val*))(var_p->class->vft[COLOR_parser__Parser__pop]))(var_p)
 var_nodearraylist1 = var12;
 var13 = NEW_array__Array(&type_array__Arraykernel__Object);
 ((void (*)(val*))(var13->class->vft[COLOR_array__Array__init]))(var13) /* init on <var13:Array[Object]>*/;
-CHECK_NEW_array__Array(var13);
 var_listnode8 = var13;
 var14 = NEW_array__Array(&type_array__Arraykernel__Object);
 ((void (*)(val*))(var14->class->vft[COLOR_array__Array__init]))(var14) /* init on <var14:Array[Object]>*/;
-CHECK_NEW_array__Array(var14);
 var_listnode17 = var14;
 var15 = NEW_array__Array(&type_array__Arraykernel__Object);
 ((void (*)(val*))(var15->class->vft[COLOR_array__Array__init]))(var15) /* init on <var15:Array[Object]>*/;
-CHECK_NEW_array__Array(var15);
 var_listnode19 = var15;
 var_pdocnode2 = var_nodearraylist1;
 /* <var_pdocnode2:nullable Object> isa nullable ADoc */
@@ -4491,8 +4541,9 @@ var16 = var_pdocnode2->type->type_table[cltype] == idtype;
 }
 }
 if (!var16) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13628);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13380);
+show_backtrace(1);
 }
 var_tkwredefnode3 = var_nodearraylist2;
 /* <var_tkwredefnode3:nullable Object> isa nullable TKwredef */
@@ -4508,8 +4559,9 @@ var17 = var_tkwredefnode3->type->type_table[cltype18] == idtype19;
 }
 }
 if (!var17) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13630);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13382);
+show_backtrace(1);
 }
 var_pvisibilitynode4 = var_nodearraylist3;
 /* <var_pvisibilitynode4:nullable Object> isa nullable AVisibility */
@@ -4525,8 +4577,9 @@ var20 = var_pvisibilitynode4->type->type_table[cltype21] == idtype22;
 }
 }
 if (!var20) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13632);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13384);
+show_backtrace(1);
 }
 var_pclasskindnode5 = var_nodearraylist4;
 /* <var_pclasskindnode5:nullable Object> isa nullable AClasskind */
@@ -4542,8 +4595,9 @@ var23 = var_pclasskindnode5->type->type_table[cltype24] == idtype25;
 }
 }
 if (!var23) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13634);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13386);
+show_backtrace(1);
 }
 var_tclassidnode6 = var_nodearraylist6;
 /* <var_tclassidnode6:nullable Object> isa nullable TClassid */
@@ -4559,8 +4613,9 @@ var26 = var_tclassidnode6->type->type_table[cltype27] == idtype28;
 }
 }
 if (!var26) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13636);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13388);
+show_backtrace(1);
 }
 var_listnode7 = var_nodearraylist7;
 /* <var_listnode7:nullable Object> isa Array[Object] */
@@ -4576,14 +4631,14 @@ var29 = var_listnode7->type->type_table[cltype30] == idtype31;
 }
 }
 if (!var29) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13638);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13390);
+show_backtrace(1);
 }
 var32 = ((val* (*)(val*, val*, val*))(self->class->vft[COLOR_parser__ReduceAction__concat]))(self, var_listnode8, var_listnode7) /* concat on <self:ReduceAction290>*/;
 var_listnode8 = var32;
 var33 = NEW_array__Array(&type_array__Arraykernel__Object);
 ((void (*)(val*))(var33->class->vft[COLOR_array__Array__init]))(var33) /* init on <var33:Array[Object]>*/;
-CHECK_NEW_array__Array(var33);
 var_listnode13 = var33;
 var_listnode12 = var_nodearraylist8;
 /* <var_listnode12:nullable Object> isa Array[Object] */
@@ -4599,8 +4654,9 @@ var34 = var_listnode12->type->type_table[cltype35] == idtype36;
 }
 }
 if (!var34) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13642);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13394);
+show_backtrace(1);
 }
 var37 = ((val* (*)(val*, val*, val*))(self->class->vft[COLOR_parser__ReduceAction__concat]))(self, var_listnode13, var_listnode12) /* concat on <self:ReduceAction290>*/;
 var_listnode13 = var37;
@@ -4609,7 +4665,6 @@ var39 = NULL;
 var40 = NULL;
 var41 = NULL;
 ((void (*)(val*, val*, val*, val*, val*))(var38->class->vft[COLOR_parser_prod__AAnnotations__init_aannotations]))(var38, var39, var40, var_listnode13, var41) /* init_aannotations on <var38:AAnnotations>*/;
-CHECK_NEW_parser_nodes__AAnnotations(var38);
 var_pannotationsnode9 = var38;
 var_listnode16 = var_nodearraylist9;
 /* <var_listnode16:nullable Object> isa Array[Object] */
@@ -4625,8 +4680,9 @@ var42 = var_listnode16->type->type_table[cltype43] == idtype44;
 }
 }
 if (!var42) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13651);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13403);
+show_backtrace(1);
 }
 var45 = ((val* (*)(val*, val*, val*))(self->class->vft[COLOR_parser__ReduceAction__concat]))(self, var_listnode17, var_listnode16) /* concat on <self:ReduceAction290>*/;
 var_listnode17 = var45;
@@ -4644,8 +4700,9 @@ var46 = var_listnode18->type->type_table[cltype47] == idtype48;
 }
 }
 if (!var46) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13654);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13406);
+show_backtrace(1);
 }
 var49 = ((val* (*)(val*, val*, val*))(self->class->vft[COLOR_parser__ReduceAction__concat]))(self, var_listnode19, var_listnode18) /* concat on <self:ReduceAction290>*/;
 var_listnode19 = var49;
@@ -4663,13 +4720,13 @@ var50 = var_tkwendnode20->type->type_table[cltype51] == idtype52;
 }
 }
 if (!var50) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13657);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13409);
+show_backtrace(1);
 }
 var53 = NEW_parser_nodes__AStdClassdef(&type_parser_nodes__AStdClassdef);
 var54 = NULL;
 ((void (*)(val*, val*, val*, val*, val*, val*, val*, val*, val*, val*, val*, val*))(var53->class->vft[COLOR_parser_prod__AStdClassdef__init_astdclassdef]))(var53, var_pdocnode2, var_tkwredefnode3, var_pvisibilitynode4, var_pclasskindnode5, var_tclassidnode6, var_listnode8, var_pannotationsnode9, var54, var_listnode17, var_listnode19, var_tkwendnode20) /* init_astdclassdef on <var53:AStdClassdef>*/;
-CHECK_NEW_parser_nodes__AStdClassdef(var53);
 var_pclassdefnode1 = var53;
 var_node_list = var_pclassdefnode1;
 var55 = self->attrs[COLOR_parser__ReduceAction___goto].l; /* _goto on <self:ReduceAction290> */
@@ -4799,15 +4856,12 @@ var12 = ((val* (*)(val*))(var_p->class->vft[COLOR_parser__Parser__pop]))(var_p)
 var_nodearraylist1 = var12;
 var13 = NEW_array__Array(&type_array__Arraykernel__Object);
 ((void (*)(val*))(var13->class->vft[COLOR_array__Array__init]))(var13) /* init on <var13:Array[Object]>*/;
-CHECK_NEW_array__Array(var13);
 var_listnode8 = var13;
 var14 = NEW_array__Array(&type_array__Arraykernel__Object);
 ((void (*)(val*))(var14->class->vft[COLOR_array__Array__init]))(var14) /* init on <var14:Array[Object]>*/;
-CHECK_NEW_array__Array(var14);
 var_listnode17 = var14;
 var15 = NEW_array__Array(&type_array__Arraykernel__Object);
 ((void (*)(val*))(var15->class->vft[COLOR_array__Array__init]))(var15) /* init on <var15:Array[Object]>*/;
-CHECK_NEW_array__Array(var15);
 var_listnode19 = var15;
 var_pdocnode2 = var_nodearraylist1;
 /* <var_pdocnode2:nullable Object> isa nullable ADoc */
@@ -4823,8 +4877,9 @@ var16 = var_pdocnode2->type->type_table[cltype] == idtype;
 }
 }
 if (!var16) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13696);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13448);
+show_backtrace(1);
 }
 var_pvisibilitynode4 = var_nodearraylist2;
 /* <var_pvisibilitynode4:nullable Object> isa nullable AVisibility */
@@ -4840,8 +4895,9 @@ var17 = var_pvisibilitynode4->type->type_table[cltype18] == idtype19;
 }
 }
 if (!var17) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13698);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13450);
+show_backtrace(1);
 }
 var_pclasskindnode5 = var_nodearraylist3;
 /* <var_pclasskindnode5:nullable Object> isa nullable AClasskind */
@@ -4857,8 +4913,9 @@ var20 = var_pclasskindnode5->type->type_table[cltype21] == idtype22;
 }
 }
 if (!var20) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13700);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13452);
+show_backtrace(1);
 }
 var_tclassidnode6 = var_nodearraylist6;
 /* <var_tclassidnode6:nullable Object> isa nullable TClassid */
@@ -4874,8 +4931,9 @@ var23 = var_tclassidnode6->type->type_table[cltype24] == idtype25;
 }
 }
 if (!var23) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13702);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13454);
+show_backtrace(1);
 }
 var_listnode7 = var_nodearraylist7;
 /* <var_listnode7:nullable Object> isa Array[Object] */
@@ -4891,14 +4949,14 @@ var26 = var_listnode7->type->type_table[cltype27] == idtype28;
 }
 }
 if (!var26) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13704);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13456);
+show_backtrace(1);
 }
 var29 = ((val* (*)(val*, val*, val*))(self->class->vft[COLOR_parser__ReduceAction__concat]))(self, var_listnode8, var_listnode7) /* concat on <self:ReduceAction291>*/;
 var_listnode8 = var29;
 var30 = NEW_array__Array(&type_array__Arraykernel__Object);
 ((void (*)(val*))(var30->class->vft[COLOR_array__Array__init]))(var30) /* init on <var30:Array[Object]>*/;
-CHECK_NEW_array__Array(var30);
 var_listnode13 = var30;
 var_listnode12 = var_nodearraylist8;
 /* <var_listnode12:nullable Object> isa Array[Object] */
@@ -4914,8 +4972,9 @@ var31 = var_listnode12->type->type_table[cltype32] == idtype33;
 }
 }
 if (!var31) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13708);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13460);
+show_backtrace(1);
 }
 var34 = ((val* (*)(val*, val*, val*))(self->class->vft[COLOR_parser__ReduceAction__concat]))(self, var_listnode13, var_listnode12) /* concat on <self:ReduceAction291>*/;
 var_listnode13 = var34;
@@ -4924,7 +4983,6 @@ var36 = NULL;
 var37 = NULL;
 var38 = NULL;
 ((void (*)(val*, val*, val*, val*, val*))(var35->class->vft[COLOR_parser_prod__AAnnotations__init_aannotations]))(var35, var36, var37, var_listnode13, var38) /* init_aannotations on <var35:AAnnotations>*/;
-CHECK_NEW_parser_nodes__AAnnotations(var35);
 var_pannotationsnode9 = var35;
 var_listnode16 = var_nodearraylist9;
 /* <var_listnode16:nullable Object> isa Array[Object] */
@@ -4940,8 +4998,9 @@ var39 = var_listnode16->type->type_table[cltype40] == idtype41;
 }
 }
 if (!var39) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13717);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13469);
+show_backtrace(1);
 }
 var42 = ((val* (*)(val*, val*, val*))(self->class->vft[COLOR_parser__ReduceAction__concat]))(self, var_listnode17, var_listnode16) /* concat on <self:ReduceAction291>*/;
 var_listnode17 = var42;
@@ -4959,8 +5018,9 @@ var43 = var_listnode18->type->type_table[cltype44] == idtype45;
 }
 }
 if (!var43) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13720);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13472);
+show_backtrace(1);
 }
 var46 = ((val* (*)(val*, val*, val*))(self->class->vft[COLOR_parser__ReduceAction__concat]))(self, var_listnode19, var_listnode18) /* concat on <self:ReduceAction291>*/;
 var_listnode19 = var46;
@@ -4978,14 +5038,14 @@ var47 = var_tkwendnode20->type->type_table[cltype48] == idtype49;
 }
 }
 if (!var47) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13723);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13475);
+show_backtrace(1);
 }
 var50 = NEW_parser_nodes__AStdClassdef(&type_parser_nodes__AStdClassdef);
 var51 = NULL;
 var52 = NULL;
 ((void (*)(val*, val*, val*, val*, val*, val*, val*, val*, val*, val*, val*, val*))(var50->class->vft[COLOR_parser_prod__AStdClassdef__init_astdclassdef]))(var50, var_pdocnode2, var51, var_pvisibilitynode4, var_pclasskindnode5, var_tclassidnode6, var_listnode8, var_pannotationsnode9, var52, var_listnode17, var_listnode19, var_tkwendnode20) /* init_astdclassdef on <var50:AStdClassdef>*/;
-CHECK_NEW_parser_nodes__AStdClassdef(var50);
 var_pclassdefnode1 = var50;
 var_node_list = var_pclassdefnode1;
 var53 = self->attrs[COLOR_parser__ReduceAction___goto].l; /* _goto on <self:ReduceAction291> */
@@ -5119,15 +5179,12 @@ var13 = ((val* (*)(val*))(var_p->class->vft[COLOR_parser__Parser__pop]))(var_p)
 var_nodearraylist1 = var13;
 var14 = NEW_array__Array(&type_array__Arraykernel__Object);
 ((void (*)(val*))(var14->class->vft[COLOR_array__Array__init]))(var14) /* init on <var14:Array[Object]>*/;
-CHECK_NEW_array__Array(var14);
 var_listnode8 = var14;
 var15 = NEW_array__Array(&type_array__Arraykernel__Object);
 ((void (*)(val*))(var15->class->vft[COLOR_array__Array__init]))(var15) /* init on <var15:Array[Object]>*/;
-CHECK_NEW_array__Array(var15);
 var_listnode17 = var15;
 var16 = NEW_array__Array(&type_array__Arraykernel__Object);
 ((void (*)(val*))(var16->class->vft[COLOR_array__Array__init]))(var16) /* init on <var16:Array[Object]>*/;
-CHECK_NEW_array__Array(var16);
 var_listnode19 = var16;
 var_pdocnode2 = var_nodearraylist1;
 /* <var_pdocnode2:nullable Object> isa nullable ADoc */
@@ -5143,8 +5200,9 @@ var17 = var_pdocnode2->type->type_table[cltype] == idtype;
 }
 }
 if (!var17) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13763);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13515);
+show_backtrace(1);
 }
 var_pvisibilitynode4 = var_nodearraylist2;
 /* <var_pvisibilitynode4:nullable Object> isa nullable AVisibility */
@@ -5160,8 +5218,9 @@ var18 = var_pvisibilitynode4->type->type_table[cltype19] == idtype20;
 }
 }
 if (!var18) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13765);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13517);
+show_backtrace(1);
 }
 var_pclasskindnode5 = var_nodearraylist3;
 /* <var_pclasskindnode5:nullable Object> isa nullable AClasskind */
@@ -5177,8 +5236,9 @@ var21 = var_pclasskindnode5->type->type_table[cltype22] == idtype23;
 }
 }
 if (!var21) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13767);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13519);
+show_backtrace(1);
 }
 var_tclassidnode6 = var_nodearraylist7;
 /* <var_tclassidnode6:nullable Object> isa nullable TClassid */
@@ -5194,8 +5254,9 @@ var24 = var_tclassidnode6->type->type_table[cltype25] == idtype26;
 }
 }
 if (!var24) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13769);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13521);
+show_backtrace(1);
 }
 var_listnode7 = var_nodearraylist8;
 /* <var_listnode7:nullable Object> isa Array[Object] */
@@ -5211,14 +5272,14 @@ var27 = var_listnode7->type->type_table[cltype28] == idtype29;
 }
 }
 if (!var27) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13771);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13523);
+show_backtrace(1);
 }
 var30 = ((val* (*)(val*, val*, val*))(self->class->vft[COLOR_parser__ReduceAction__concat]))(self, var_listnode8, var_listnode7) /* concat on <self:ReduceAction292>*/;
 var_listnode8 = var30;
 var31 = NEW_array__Array(&type_array__Arraykernel__Object);
 ((void (*)(val*))(var31->class->vft[COLOR_array__Array__init]))(var31) /* init on <var31:Array[Object]>*/;
-CHECK_NEW_array__Array(var31);
 var_listnode13 = var31;
 var_listnode12 = var_nodearraylist9;
 /* <var_listnode12:nullable Object> isa Array[Object] */
@@ -5234,8 +5295,9 @@ var32 = var_listnode12->type->type_table[cltype33] == idtype34;
 }
 }
 if (!var32) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13775);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13527);
+show_backtrace(1);
 }
 var35 = ((val* (*)(val*, val*, val*))(self->class->vft[COLOR_parser__ReduceAction__concat]))(self, var_listnode13, var_listnode12) /* concat on <self:ReduceAction292>*/;
 var_listnode13 = var35;
@@ -5244,7 +5306,6 @@ var37 = NULL;
 var38 = NULL;
 var39 = NULL;
 ((void (*)(val*, val*, val*, val*, val*))(var36->class->vft[COLOR_parser_prod__AAnnotations__init_aannotations]))(var36, var37, var38, var_listnode13, var39) /* init_aannotations on <var36:AAnnotations>*/;
-CHECK_NEW_parser_nodes__AAnnotations(var36);
 var_pannotationsnode9 = var36;
 var_listnode16 = var_nodearraylist10;
 /* <var_listnode16:nullable Object> isa Array[Object] */
@@ -5260,8 +5321,9 @@ var40 = var_listnode16->type->type_table[cltype41] == idtype42;
 }
 }
 if (!var40) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13784);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13536);
+show_backtrace(1);
 }
 var43 = ((val* (*)(val*, val*, val*))(self->class->vft[COLOR_parser__ReduceAction__concat]))(self, var_listnode17, var_listnode16) /* concat on <self:ReduceAction292>*/;
 var_listnode17 = var43;
@@ -5279,8 +5341,9 @@ var44 = var_listnode18->type->type_table[cltype45] == idtype46;
 }
 }
 if (!var44) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13787);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13539);
+show_backtrace(1);
 }
 var47 = ((val* (*)(val*, val*, val*))(self->class->vft[COLOR_parser__ReduceAction__concat]))(self, var_listnode19, var_listnode18) /* concat on <self:ReduceAction292>*/;
 var_listnode19 = var47;
@@ -5298,14 +5361,14 @@ var48 = var_tkwendnode20->type->type_table[cltype49] == idtype50;
 }
 }
 if (!var48) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13790);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13542);
+show_backtrace(1);
 }
 var51 = NEW_parser_nodes__AStdClassdef(&type_parser_nodes__AStdClassdef);
 var52 = NULL;
 var53 = NULL;
 ((void (*)(val*, val*, val*, val*, val*, val*, val*, val*, val*, val*, val*, val*))(var51->class->vft[COLOR_parser_prod__AStdClassdef__init_astdclassdef]))(var51, var_pdocnode2, var52, var_pvisibilitynode4, var_pclasskindnode5, var_tclassidnode6, var_listnode8, var_pannotationsnode9, var53, var_listnode17, var_listnode19, var_tkwendnode20) /* init_astdclassdef on <var51:AStdClassdef>*/;
-CHECK_NEW_parser_nodes__AStdClassdef(var51);
 var_pclassdefnode1 = var51;
 var_node_list = var_pclassdefnode1;
 var54 = self->attrs[COLOR_parser__ReduceAction___goto].l; /* _goto on <self:ReduceAction292> */
@@ -5442,15 +5505,12 @@ var13 = ((val* (*)(val*))(var_p->class->vft[COLOR_parser__Parser__pop]))(var_p)
 var_nodearraylist1 = var13;
 var14 = NEW_array__Array(&type_array__Arraykernel__Object);
 ((void (*)(val*))(var14->class->vft[COLOR_array__Array__init]))(var14) /* init on <var14:Array[Object]>*/;
-CHECK_NEW_array__Array(var14);
 var_listnode8 = var14;
 var15 = NEW_array__Array(&type_array__Arraykernel__Object);
 ((void (*)(val*))(var15->class->vft[COLOR_array__Array__init]))(var15) /* init on <var15:Array[Object]>*/;
-CHECK_NEW_array__Array(var15);
 var_listnode17 = var15;
 var16 = NEW_array__Array(&type_array__Arraykernel__Object);
 ((void (*)(val*))(var16->class->vft[COLOR_array__Array__init]))(var16) /* init on <var16:Array[Object]>*/;
-CHECK_NEW_array__Array(var16);
 var_listnode19 = var16;
 var_pdocnode2 = var_nodearraylist1;
 /* <var_pdocnode2:nullable Object> isa nullable ADoc */
@@ -5466,8 +5526,9 @@ var17 = var_pdocnode2->type->type_table[cltype] == idtype;
 }
 }
 if (!var17) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13830);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13582);
+show_backtrace(1);
 }
 var_tkwredefnode3 = var_nodearraylist2;
 /* <var_tkwredefnode3:nullable Object> isa nullable TKwredef */
@@ -5483,8 +5544,9 @@ var18 = var_tkwredefnode3->type->type_table[cltype19] == idtype20;
 }
 }
 if (!var18) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13832);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13584);
+show_backtrace(1);
 }
 var_pvisibilitynode4 = var_nodearraylist3;
 /* <var_pvisibilitynode4:nullable Object> isa nullable AVisibility */
@@ -5500,8 +5562,9 @@ var21 = var_pvisibilitynode4->type->type_table[cltype22] == idtype23;
 }
 }
 if (!var21) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13834);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13586);
+show_backtrace(1);
 }
 var_pclasskindnode5 = var_nodearraylist4;
 /* <var_pclasskindnode5:nullable Object> isa nullable AClasskind */
@@ -5517,8 +5580,9 @@ var24 = var_pclasskindnode5->type->type_table[cltype25] == idtype26;
 }
 }
 if (!var24) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13836);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13588);
+show_backtrace(1);
 }
 var_tclassidnode6 = var_nodearraylist7;
 /* <var_tclassidnode6:nullable Object> isa nullable TClassid */
@@ -5534,8 +5598,9 @@ var27 = var_tclassidnode6->type->type_table[cltype28] == idtype29;
 }
 }
 if (!var27) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13838);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13590);
+show_backtrace(1);
 }
 var_listnode7 = var_nodearraylist8;
 /* <var_listnode7:nullable Object> isa Array[Object] */
@@ -5551,14 +5616,14 @@ var30 = var_listnode7->type->type_table[cltype31] == idtype32;
 }
 }
 if (!var30) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13840);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13592);
+show_backtrace(1);
 }
 var33 = ((val* (*)(val*, val*, val*))(self->class->vft[COLOR_parser__ReduceAction__concat]))(self, var_listnode8, var_listnode7) /* concat on <self:ReduceAction294>*/;
 var_listnode8 = var33;
 var34 = NEW_array__Array(&type_array__Arraykernel__Object);
 ((void (*)(val*))(var34->class->vft[COLOR_array__Array__init]))(var34) /* init on <var34:Array[Object]>*/;
-CHECK_NEW_array__Array(var34);
 var_listnode13 = var34;
 var_listnode12 = var_nodearraylist9;
 /* <var_listnode12:nullable Object> isa Array[Object] */
@@ -5574,8 +5639,9 @@ var35 = var_listnode12->type->type_table[cltype36] == idtype37;
 }
 }
 if (!var35) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13844);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13596);
+show_backtrace(1);
 }
 var38 = ((val* (*)(val*, val*, val*))(self->class->vft[COLOR_parser__ReduceAction__concat]))(self, var_listnode13, var_listnode12) /* concat on <self:ReduceAction294>*/;
 var_listnode13 = var38;
@@ -5584,7 +5650,6 @@ var40 = NULL;
 var41 = NULL;
 var42 = NULL;
 ((void (*)(val*, val*, val*, val*, val*))(var39->class->vft[COLOR_parser_prod__AAnnotations__init_aannotations]))(var39, var40, var41, var_listnode13, var42) /* init_aannotations on <var39:AAnnotations>*/;
-CHECK_NEW_parser_nodes__AAnnotations(var39);
 var_pannotationsnode9 = var39;
 var_listnode16 = var_nodearraylist10;
 /* <var_listnode16:nullable Object> isa Array[Object] */
@@ -5600,8 +5665,9 @@ var43 = var_listnode16->type->type_table[cltype44] == idtype45;
 }
 }
 if (!var43) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13853);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13605);
+show_backtrace(1);
 }
 var46 = ((val* (*)(val*, val*, val*))(self->class->vft[COLOR_parser__ReduceAction__concat]))(self, var_listnode17, var_listnode16) /* concat on <self:ReduceAction294>*/;
 var_listnode17 = var46;
@@ -5619,8 +5685,9 @@ var47 = var_listnode18->type->type_table[cltype48] == idtype49;
 }
 }
 if (!var47) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13856);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13608);
+show_backtrace(1);
 }
 var50 = ((val* (*)(val*, val*, val*))(self->class->vft[COLOR_parser__ReduceAction__concat]))(self, var_listnode19, var_listnode18) /* concat on <self:ReduceAction294>*/;
 var_listnode19 = var50;
@@ -5638,13 +5705,13 @@ var51 = var_tkwendnode20->type->type_table[cltype52] == idtype53;
 }
 }
 if (!var51) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13859);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13611);
+show_backtrace(1);
 }
 var54 = NEW_parser_nodes__AStdClassdef(&type_parser_nodes__AStdClassdef);
 var55 = NULL;
 ((void (*)(val*, val*, val*, val*, val*, val*, val*, val*, val*, val*, val*, val*))(var54->class->vft[COLOR_parser_prod__AStdClassdef__init_astdclassdef]))(var54, var_pdocnode2, var_tkwredefnode3, var_pvisibilitynode4, var_pclasskindnode5, var_tclassidnode6, var_listnode8, var_pannotationsnode9, var55, var_listnode17, var_listnode19, var_tkwendnode20) /* init_astdclassdef on <var54:AStdClassdef>*/;
-CHECK_NEW_parser_nodes__AStdClassdef(var54);
 var_pclassdefnode1 = var54;
 var_node_list = var_pclassdefnode1;
 var56 = self->attrs[COLOR_parser__ReduceAction___goto].l; /* _goto on <self:ReduceAction294> */
@@ -5785,15 +5852,12 @@ var14 = ((val* (*)(val*))(var_p->class->vft[COLOR_parser__Parser__pop]))(var_p)
 var_nodearraylist1 = var14;
 var15 = NEW_array__Array(&type_array__Arraykernel__Object);
 ((void (*)(val*))(var15->class->vft[COLOR_array__Array__init]))(var15) /* init on <var15:Array[Object]>*/;
-CHECK_NEW_array__Array(var15);
 var_listnode8 = var15;
 var16 = NEW_array__Array(&type_array__Arraykernel__Object);
 ((void (*)(val*))(var16->class->vft[COLOR_array__Array__init]))(var16) /* init on <var16:Array[Object]>*/;
-CHECK_NEW_array__Array(var16);
 var_listnode17 = var16;
 var17 = NEW_array__Array(&type_array__Arraykernel__Object);
 ((void (*)(val*))(var17->class->vft[COLOR_array__Array__init]))(var17) /* init on <var17:Array[Object]>*/;
-CHECK_NEW_array__Array(var17);
 var_listnode19 = var17;
 var_pdocnode2 = var_nodearraylist1;
 /* <var_pdocnode2:nullable Object> isa nullable ADoc */
@@ -5809,8 +5873,9 @@ var18 = var_pdocnode2->type->type_table[cltype] == idtype;
 }
 }
 if (!var18) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13900);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13652);
+show_backtrace(1);
 }
 var_tkwredefnode3 = var_nodearraylist2;
 /* <var_tkwredefnode3:nullable Object> isa nullable TKwredef */
@@ -5826,8 +5891,9 @@ var19 = var_tkwredefnode3->type->type_table[cltype20] == idtype21;
 }
 }
 if (!var19) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13902);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13654);
+show_backtrace(1);
 }
 var_pvisibilitynode4 = var_nodearraylist3;
 /* <var_pvisibilitynode4:nullable Object> isa nullable AVisibility */
@@ -5843,8 +5909,9 @@ var22 = var_pvisibilitynode4->type->type_table[cltype23] == idtype24;
 }
 }
 if (!var22) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13904);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13656);
+show_backtrace(1);
 }
 var_pclasskindnode5 = var_nodearraylist4;
 /* <var_pclasskindnode5:nullable Object> isa nullable AClasskind */
@@ -5860,8 +5927,9 @@ var25 = var_pclasskindnode5->type->type_table[cltype26] == idtype27;
 }
 }
 if (!var25) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13906);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13658);
+show_backtrace(1);
 }
 var_tclassidnode6 = var_nodearraylist8;
 /* <var_tclassidnode6:nullable Object> isa nullable TClassid */
@@ -5877,8 +5945,9 @@ var28 = var_tclassidnode6->type->type_table[cltype29] == idtype30;
 }
 }
 if (!var28) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13908);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13660);
+show_backtrace(1);
 }
 var_listnode7 = var_nodearraylist9;
 /* <var_listnode7:nullable Object> isa Array[Object] */
@@ -5894,14 +5963,14 @@ var31 = var_listnode7->type->type_table[cltype32] == idtype33;
 }
 }
 if (!var31) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13910);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13662);
+show_backtrace(1);
 }
 var34 = ((val* (*)(val*, val*, val*))(self->class->vft[COLOR_parser__ReduceAction__concat]))(self, var_listnode8, var_listnode7) /* concat on <self:ReduceAction295>*/;
 var_listnode8 = var34;
 var35 = NEW_array__Array(&type_array__Arraykernel__Object);
 ((void (*)(val*))(var35->class->vft[COLOR_array__Array__init]))(var35) /* init on <var35:Array[Object]>*/;
-CHECK_NEW_array__Array(var35);
 var_listnode13 = var35;
 var_listnode12 = var_nodearraylist10;
 /* <var_listnode12:nullable Object> isa Array[Object] */
@@ -5917,8 +5986,9 @@ var36 = var_listnode12->type->type_table[cltype37] == idtype38;
 }
 }
 if (!var36) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13914);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13666);
+show_backtrace(1);
 }
 var39 = ((val* (*)(val*, val*, val*))(self->class->vft[COLOR_parser__ReduceAction__concat]))(self, var_listnode13, var_listnode12) /* concat on <self:ReduceAction295>*/;
 var_listnode13 = var39;
@@ -5927,7 +5997,6 @@ var41 = NULL;
 var42 = NULL;
 var43 = NULL;
 ((void (*)(val*, val*, val*, val*, val*))(var40->class->vft[COLOR_parser_prod__AAnnotations__init_aannotations]))(var40, var41, var42, var_listnode13, var43) /* init_aannotations on <var40:AAnnotations>*/;
-CHECK_NEW_parser_nodes__AAnnotations(var40);
 var_pannotationsnode9 = var40;
 var_listnode16 = var_nodearraylist11;
 /* <var_listnode16:nullable Object> isa Array[Object] */
@@ -5943,8 +6012,9 @@ var44 = var_listnode16->type->type_table[cltype45] == idtype46;
 }
 }
 if (!var44) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13923);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13675);
+show_backtrace(1);
 }
 var47 = ((val* (*)(val*, val*, val*))(self->class->vft[COLOR_parser__ReduceAction__concat]))(self, var_listnode17, var_listnode16) /* concat on <self:ReduceAction295>*/;
 var_listnode17 = var47;
@@ -5962,8 +6032,9 @@ var48 = var_listnode18->type->type_table[cltype49] == idtype50;
 }
 }
 if (!var48) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13926);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13678);
+show_backtrace(1);
 }
 var51 = ((val* (*)(val*, val*, val*))(self->class->vft[COLOR_parser__ReduceAction__concat]))(self, var_listnode19, var_listnode18) /* concat on <self:ReduceAction295>*/;
 var_listnode19 = var51;
@@ -5981,13 +6052,13 @@ var52 = var_tkwendnode20->type->type_table[cltype53] == idtype54;
 }
 }
 if (!var52) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13929);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13681);
+show_backtrace(1);
 }
 var55 = NEW_parser_nodes__AStdClassdef(&type_parser_nodes__AStdClassdef);
 var56 = NULL;
 ((void (*)(val*, val*, val*, val*, val*, val*, val*, val*, val*, val*, val*, val*))(var55->class->vft[COLOR_parser_prod__AStdClassdef__init_astdclassdef]))(var55, var_pdocnode2, var_tkwredefnode3, var_pvisibilitynode4, var_pclasskindnode5, var_tclassidnode6, var_listnode8, var_pannotationsnode9, var56, var_listnode17, var_listnode19, var_tkwendnode20) /* init_astdclassdef on <var55:AStdClassdef>*/;
-CHECK_NEW_parser_nodes__AStdClassdef(var55);
 var_pclassdefnode1 = var55;
 var_node_list = var_pclassdefnode1;
 var57 = self->attrs[COLOR_parser__ReduceAction___goto].l; /* _goto on <self:ReduceAction295> */
@@ -6096,15 +6167,12 @@ var10 = ((val* (*)(val*))(var_p->class->vft[COLOR_parser__Parser__pop]))(var_p)
 var_nodearraylist1 = var10;
 var11 = NEW_array__Array(&type_array__Arraykernel__Object);
 ((void (*)(val*))(var11->class->vft[COLOR_array__Array__init]))(var11) /* init on <var11:Array[Object]>*/;
-CHECK_NEW_array__Array(var11);
 var_listnode7 = var11;
 var12 = NEW_array__Array(&type_array__Arraykernel__Object);
 ((void (*)(val*))(var12->class->vft[COLOR_array__Array__init]))(var12) /* init on <var12:Array[Object]>*/;
-CHECK_NEW_array__Array(var12);
 var_listnode11 = var12;
 var13 = NEW_array__Array(&type_array__Arraykernel__Object);
 ((void (*)(val*))(var13->class->vft[COLOR_array__Array__init]))(var13) /* init on <var13:Array[Object]>*/;
-CHECK_NEW_array__Array(var13);
 var_listnode13 = var13;
 var_pdocnode2 = var_nodearraylist1;
 /* <var_pdocnode2:nullable Object> isa nullable ADoc */
@@ -6120,8 +6188,9 @@ var14 = var_pdocnode2->type->type_table[cltype] == idtype;
 }
 }
 if (!var14) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13966);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13718);
+show_backtrace(1);
 }
 var_pvisibilitynode4 = var_nodearraylist2;
 /* <var_pvisibilitynode4:nullable Object> isa nullable AVisibility */
@@ -6137,8 +6206,9 @@ var15 = var_pvisibilitynode4->type->type_table[cltype16] == idtype17;
 }
 }
 if (!var15) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13968);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13720);
+show_backtrace(1);
 }
 var_pclasskindnode5 = var_nodearraylist3;
 /* <var_pclasskindnode5:nullable Object> isa nullable AClasskind */
@@ -6154,8 +6224,9 @@ var18 = var_pclasskindnode5->type->type_table[cltype19] == idtype20;
 }
 }
 if (!var18) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13970);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13722);
+show_backtrace(1);
 }
 var_tclassidnode6 = var_nodearraylist5;
 /* <var_tclassidnode6:nullable Object> isa nullable TClassid */
@@ -6171,8 +6242,9 @@ var21 = var_tclassidnode6->type->type_table[cltype22] == idtype23;
 }
 }
 if (!var21) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13972);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13724);
+show_backtrace(1);
 }
 var_pexterncodeblocknode9 = var_nodearraylist6;
 /* <var_pexterncodeblocknode9:nullable Object> isa nullable AExternCodeBlock */
@@ -6188,8 +6260,9 @@ var24 = var_pexterncodeblocknode9->type->type_table[cltype25] == idtype26;
 }
 }
 if (!var24) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13974);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13726);
+show_backtrace(1);
 }
 var_listnode10 = var_nodearraylist7;
 /* <var_listnode10:nullable Object> isa Array[Object] */
@@ -6205,8 +6278,9 @@ var27 = var_listnode10->type->type_table[cltype28] == idtype29;
 }
 }
 if (!var27) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13976);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13728);
+show_backtrace(1);
 }
 var30 = ((val* (*)(val*, val*, val*))(self->class->vft[COLOR_parser__ReduceAction__concat]))(self, var_listnode11, var_listnode10) /* concat on <self:ReduceAction297>*/;
 var_listnode11 = var30;
@@ -6224,8 +6298,9 @@ var31 = var_listnode12->type->type_table[cltype32] == idtype33;
 }
 }
 if (!var31) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13979);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13731);
+show_backtrace(1);
 }
 var34 = ((val* (*)(val*, val*, val*))(self->class->vft[COLOR_parser__ReduceAction__concat]))(self, var_listnode13, var_listnode12) /* concat on <self:ReduceAction297>*/;
 var_listnode13 = var34;
@@ -6243,14 +6318,14 @@ var35 = var_tkwendnode14->type->type_table[cltype36] == idtype37;
 }
 }
 if (!var35) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 13982);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13734);
+show_backtrace(1);
 }
 var38 = NEW_parser_nodes__AStdClassdef(&type_parser_nodes__AStdClassdef);
 var39 = NULL;
 var40 = NULL;
 ((void (*)(val*, val*, val*, val*, val*, val*, val*, val*, val*, val*, val*, val*))(var38->class->vft[COLOR_parser_prod__AStdClassdef__init_astdclassdef]))(var38, var_pdocnode2, var39, var_pvisibilitynode4, var_pclasskindnode5, var_tclassidnode6, var_listnode7, var40, var_pexterncodeblocknode9, var_listnode11, var_listnode13, var_tkwendnode14) /* init_astdclassdef on <var38:AStdClassdef>*/;
-CHECK_NEW_parser_nodes__AStdClassdef(var38);
 var_pclassdefnode1 = var38;
 var_node_list = var_pclassdefnode1;
 var41 = self->attrs[COLOR_parser__ReduceAction___goto].l; /* _goto on <self:ReduceAction297> */
@@ -6366,15 +6441,12 @@ var11 = ((val* (*)(val*))(var_p->class->vft[COLOR_parser__Parser__pop]))(var_p)
 var_nodearraylist1 = var11;
 var12 = NEW_array__Array(&type_array__Arraykernel__Object);
 ((void (*)(val*))(var12->class->vft[COLOR_array__Array__init]))(var12) /* init on <var12:Array[Object]>*/;
-CHECK_NEW_array__Array(var12);
 var_listnode7 = var12;
 var13 = NEW_array__Array(&type_array__Arraykernel__Object);
 ((void (*)(val*))(var13->class->vft[COLOR_array__Array__init]))(var13) /* init on <var13:Array[Object]>*/;
-CHECK_NEW_array__Array(var13);
 var_listnode11 = var13;
 var14 = NEW_array__Array(&type_array__Arraykernel__Object);
 ((void (*)(val*))(var14->class->vft[COLOR_array__Array__init]))(var14) /* init on <var14:Array[Object]>*/;
-CHECK_NEW_array__Array(var14);
 var_listnode13 = var14;
 var_pdocnode2 = var_nodearraylist1;
 /* <var_pdocnode2:nullable Object> isa nullable ADoc */
@@ -6390,8 +6462,9 @@ var15 = var_pdocnode2->type->type_table[cltype] == idtype;
 }
 }
 if (!var15) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 14020);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13772);
+show_backtrace(1);
 }
 var_tkwredefnode3 = var_nodearraylist2;
 /* <var_tkwredefnode3:nullable Object> isa nullable TKwredef */
@@ -6407,8 +6480,9 @@ var16 = var_tkwredefnode3->type->type_table[cltype17] == idtype18;
 }
 }
 if (!var16) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 14022);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13774);
+show_backtrace(1);
 }
 var_pvisibilitynode4 = var_nodearraylist3;
 /* <var_pvisibilitynode4:nullable Object> isa nullable AVisibility */
@@ -6424,8 +6498,9 @@ var19 = var_pvisibilitynode4->type->type_table[cltype20] == idtype21;
 }
 }
 if (!var19) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 14024);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13776);
+show_backtrace(1);
 }
 var_pclasskindnode5 = var_nodearraylist4;
 /* <var_pclasskindnode5:nullable Object> isa nullable AClasskind */
@@ -6441,8 +6516,9 @@ var22 = var_pclasskindnode5->type->type_table[cltype23] == idtype24;
 }
 }
 if (!var22) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 14026);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13778);
+show_backtrace(1);
 }
 var_tclassidnode6 = var_nodearraylist6;
 /* <var_tclassidnode6:nullable Object> isa nullable TClassid */
@@ -6458,8 +6534,9 @@ var25 = var_tclassidnode6->type->type_table[cltype26] == idtype27;
 }
 }
 if (!var25) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 14028);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13780);
+show_backtrace(1);
 }
 var_pexterncodeblocknode9 = var_nodearraylist7;
 /* <var_pexterncodeblocknode9:nullable Object> isa nullable AExternCodeBlock */
@@ -6475,8 +6552,9 @@ var28 = var_pexterncodeblocknode9->type->type_table[cltype29] == idtype30;
 }
 }
 if (!var28) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 14030);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13782);
+show_backtrace(1);
 }
 var_listnode10 = var_nodearraylist8;
 /* <var_listnode10:nullable Object> isa Array[Object] */
@@ -6492,8 +6570,9 @@ var31 = var_listnode10->type->type_table[cltype32] == idtype33;
 }
 }
 if (!var31) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 14032);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13784);
+show_backtrace(1);
 }
 var34 = ((val* (*)(val*, val*, val*))(self->class->vft[COLOR_parser__ReduceAction__concat]))(self, var_listnode11, var_listnode10) /* concat on <self:ReduceAction298>*/;
 var_listnode11 = var34;
@@ -6511,8 +6590,9 @@ var35 = var_listnode12->type->type_table[cltype36] == idtype37;
 }
 }
 if (!var35) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 14035);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13787);
+show_backtrace(1);
 }
 var38 = ((val* (*)(val*, val*, val*))(self->class->vft[COLOR_parser__ReduceAction__concat]))(self, var_listnode13, var_listnode12) /* concat on <self:ReduceAction298>*/;
 var_listnode13 = var38;
@@ -6530,13 +6610,13 @@ var39 = var_tkwendnode14->type->type_table[cltype40] == idtype41;
 }
 }
 if (!var39) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 14038);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13790);
+show_backtrace(1);
 }
 var42 = NEW_parser_nodes__AStdClassdef(&type_parser_nodes__AStdClassdef);
 var43 = NULL;
 ((void (*)(val*, val*, val*, val*, val*, val*, val*, val*, val*, val*, val*, val*))(var42->class->vft[COLOR_parser_prod__AStdClassdef__init_astdclassdef]))(var42, var_pdocnode2, var_tkwredefnode3, var_pvisibilitynode4, var_pclasskindnode5, var_tclassidnode6, var_listnode7, var43, var_pexterncodeblocknode9, var_listnode11, var_listnode13, var_tkwendnode14) /* init_astdclassdef on <var42:AStdClassdef>*/;
-CHECK_NEW_parser_nodes__AStdClassdef(var42);
 var_pclassdefnode1 = var42;
 var_node_list = var_pclassdefnode1;
 var44 = self->attrs[COLOR_parser__ReduceAction___goto].l; /* _goto on <self:ReduceAction298> */
@@ -6649,15 +6729,12 @@ var11 = ((val* (*)(val*))(var_p->class->vft[COLOR_parser__Parser__pop]))(var_p)
 var_nodearraylist1 = var11;
 var12 = NEW_array__Array(&type_array__Arraykernel__Object);
 ((void (*)(val*))(var12->class->vft[COLOR_array__Array__init]))(var12) /* init on <var12:Array[Object]>*/;
-CHECK_NEW_array__Array(var12);
 var_listnode7 = var12;
 var13 = NEW_array__Array(&type_array__Arraykernel__Object);
 ((void (*)(val*))(var13->class->vft[COLOR_array__Array__init]))(var13) /* init on <var13:Array[Object]>*/;
-CHECK_NEW_array__Array(var13);
 var_listnode11 = var13;
 var14 = NEW_array__Array(&type_array__Arraykernel__Object);
 ((void (*)(val*))(var14->class->vft[COLOR_array__Array__init]))(var14) /* init on <var14:Array[Object]>*/;
-CHECK_NEW_array__Array(var14);
 var_listnode13 = var14;
 var_pdocnode2 = var_nodearraylist1;
 /* <var_pdocnode2:nullable Object> isa nullable ADoc */
@@ -6673,8 +6750,9 @@ var15 = var_pdocnode2->type->type_table[cltype] == idtype;
 }
 }
 if (!var15) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 14076);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13828);
+show_backtrace(1);
 }
 var_pvisibilitynode4 = var_nodearraylist2;
 /* <var_pvisibilitynode4:nullable Object> isa nullable AVisibility */
@@ -6690,8 +6768,9 @@ var16 = var_pvisibilitynode4->type->type_table[cltype17] == idtype18;
 }
 }
 if (!var16) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 14078);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13830);
+show_backtrace(1);
 }
 var_pclasskindnode5 = var_nodearraylist3;
 /* <var_pclasskindnode5:nullable Object> isa nullable AClasskind */
@@ -6707,8 +6786,9 @@ var19 = var_pclasskindnode5->type->type_table[cltype20] == idtype21;
 }
 }
 if (!var19) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 14080);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13832);
+show_backtrace(1);
 }
 var_tclassidnode6 = var_nodearraylist6;
 /* <var_tclassidnode6:nullable Object> isa nullable TClassid */
@@ -6724,8 +6804,9 @@ var22 = var_tclassidnode6->type->type_table[cltype23] == idtype24;
 }
 }
 if (!var22) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 14082);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13834);
+show_backtrace(1);
 }
 var_pexterncodeblocknode9 = var_nodearraylist7;
 /* <var_pexterncodeblocknode9:nullable Object> isa nullable AExternCodeBlock */
@@ -6741,8 +6822,9 @@ var25 = var_pexterncodeblocknode9->type->type_table[cltype26] == idtype27;
 }
 }
 if (!var25) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 14084);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13836);
+show_backtrace(1);
 }
 var_listnode10 = var_nodearraylist8;
 /* <var_listnode10:nullable Object> isa Array[Object] */
@@ -6758,8 +6840,9 @@ var28 = var_listnode10->type->type_table[cltype29] == idtype30;
 }
 }
 if (!var28) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 14086);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13838);
+show_backtrace(1);
 }
 var31 = ((val* (*)(val*, val*, val*))(self->class->vft[COLOR_parser__ReduceAction__concat]))(self, var_listnode11, var_listnode10) /* concat on <self:ReduceAction299>*/;
 var_listnode11 = var31;
@@ -6777,8 +6860,9 @@ var32 = var_listnode12->type->type_table[cltype33] == idtype34;
 }
 }
 if (!var32) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 14089);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13841);
+show_backtrace(1);
 }
 var35 = ((val* (*)(val*, val*, val*))(self->class->vft[COLOR_parser__ReduceAction__concat]))(self, var_listnode13, var_listnode12) /* concat on <self:ReduceAction299>*/;
 var_listnode13 = var35;
@@ -6796,14 +6880,14 @@ var36 = var_tkwendnode14->type->type_table[cltype37] == idtype38;
 }
 }
 if (!var36) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 14092);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13844);
+show_backtrace(1);
 }
 var39 = NEW_parser_nodes__AStdClassdef(&type_parser_nodes__AStdClassdef);
 var40 = NULL;
 var41 = NULL;
 ((void (*)(val*, val*, val*, val*, val*, val*, val*, val*, val*, val*, val*, val*))(var39->class->vft[COLOR_parser_prod__AStdClassdef__init_astdclassdef]))(var39, var_pdocnode2, var40, var_pvisibilitynode4, var_pclasskindnode5, var_tclassidnode6, var_listnode7, var41, var_pexterncodeblocknode9, var_listnode11, var_listnode13, var_tkwendnode14) /* init_astdclassdef on <var39:AStdClassdef>*/;
-CHECK_NEW_parser_nodes__AStdClassdef(var39);
 var_pclassdefnode1 = var39;
 var_node_list = var_pclassdefnode1;
 var42 = self->attrs[COLOR_parser__ReduceAction___goto].l; /* _goto on <self:ReduceAction299> */
@@ -6920,15 +7004,12 @@ var12 = ((val* (*)(val*))(var_p->class->vft[COLOR_parser__Parser__pop]))(var_p)
 var_nodearraylist1 = var12;
 var13 = NEW_array__Array(&type_array__Arraykernel__Object);
 ((void (*)(val*))(var13->class->vft[COLOR_array__Array__init]))(var13) /* init on <var13:Array[Object]>*/;
-CHECK_NEW_array__Array(var13);
 var_listnode7 = var13;
 var14 = NEW_array__Array(&type_array__Arraykernel__Object);
 ((void (*)(val*))(var14->class->vft[COLOR_array__Array__init]))(var14) /* init on <var14:Array[Object]>*/;
-CHECK_NEW_array__Array(var14);
 var_listnode11 = var14;
 var15 = NEW_array__Array(&type_array__Arraykernel__Object);
 ((void (*)(val*))(var15->class->vft[COLOR_array__Array__init]))(var15) /* init on <var15:Array[Object]>*/;
-CHECK_NEW_array__Array(var15);
 var_listnode13 = var15;
 var_pdocnode2 = var_nodearraylist1;
 /* <var_pdocnode2:nullable Object> isa nullable ADoc */
@@ -6944,8 +7025,9 @@ var16 = var_pdocnode2->type->type_table[cltype] == idtype;
 }
 }
 if (!var16) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 14131);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13883);
+show_backtrace(1);
 }
 var_pvisibilitynode4 = var_nodearraylist2;
 /* <var_pvisibilitynode4:nullable Object> isa nullable AVisibility */
@@ -6961,8 +7043,9 @@ var17 = var_pvisibilitynode4->type->type_table[cltype18] == idtype19;
 }
 }
 if (!var17) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 14133);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13885);
+show_backtrace(1);
 }
 var_pclasskindnode5 = var_nodearraylist3;
 /* <var_pclasskindnode5:nullable Object> isa nullable AClasskind */
@@ -6978,8 +7061,9 @@ var20 = var_pclasskindnode5->type->type_table[cltype21] == idtype22;
 }
 }
 if (!var20) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 14135);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13887);
+show_backtrace(1);
 }
 var_tclassidnode6 = var_nodearraylist7;
 /* <var_tclassidnode6:nullable Object> isa nullable TClassid */
@@ -6995,8 +7079,9 @@ var23 = var_tclassidnode6->type->type_table[cltype24] == idtype25;
 }
 }
 if (!var23) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 14137);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13889);
+show_backtrace(1);
 }
 var_pexterncodeblocknode9 = var_nodearraylist8;
 /* <var_pexterncodeblocknode9:nullable Object> isa nullable AExternCodeBlock */
@@ -7012,8 +7097,9 @@ var26 = var_pexterncodeblocknode9->type->type_table[cltype27] == idtype28;
 }
 }
 if (!var26) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 14139);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13891);
+show_backtrace(1);
 }
 var_listnode10 = var_nodearraylist9;
 /* <var_listnode10:nullable Object> isa Array[Object] */
@@ -7029,8 +7115,9 @@ var29 = var_listnode10->type->type_table[cltype30] == idtype31;
 }
 }
 if (!var29) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 14141);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13893);
+show_backtrace(1);
 }
 var32 = ((val* (*)(val*, val*, val*))(self->class->vft[COLOR_parser__ReduceAction__concat]))(self, var_listnode11, var_listnode10) /* concat on <self:ReduceAction300>*/;
 var_listnode11 = var32;
@@ -7048,8 +7135,9 @@ var33 = var_listnode12->type->type_table[cltype34] == idtype35;
 }
 }
 if (!var33) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 14144);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13896);
+show_backtrace(1);
 }
 var36 = ((val* (*)(val*, val*, val*))(self->class->vft[COLOR_parser__ReduceAction__concat]))(self, var_listnode13, var_listnode12) /* concat on <self:ReduceAction300>*/;
 var_listnode13 = var36;
@@ -7067,14 +7155,14 @@ var37 = var_tkwendnode14->type->type_table[cltype38] == idtype39;
 }
 }
 if (!var37) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 14147);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13899);
+show_backtrace(1);
 }
 var40 = NEW_parser_nodes__AStdClassdef(&type_parser_nodes__AStdClassdef);
 var41 = NULL;
 var42 = NULL;
 ((void (*)(val*, val*, val*, val*, val*, val*, val*, val*, val*, val*, val*, val*))(var40->class->vft[COLOR_parser_prod__AStdClassdef__init_astdclassdef]))(var40, var_pdocnode2, var41, var_pvisibilitynode4, var_pclasskindnode5, var_tclassidnode6, var_listnode7, var42, var_pexterncodeblocknode9, var_listnode11, var_listnode13, var_tkwendnode14) /* init_astdclassdef on <var40:AStdClassdef>*/;
-CHECK_NEW_parser_nodes__AStdClassdef(var40);
 var_pclassdefnode1 = var40;
 var_node_list = var_pclassdefnode1;
 var43 = self->attrs[COLOR_parser__ReduceAction___goto].l; /* _goto on <self:ReduceAction300> */
@@ -7194,15 +7282,12 @@ var12 = ((val* (*)(val*))(var_p->class->vft[COLOR_parser__Parser__pop]))(var_p)
 var_nodearraylist1 = var12;
 var13 = NEW_array__Array(&type_array__Arraykernel__Object);
 ((void (*)(val*))(var13->class->vft[COLOR_array__Array__init]))(var13) /* init on <var13:Array[Object]>*/;
-CHECK_NEW_array__Array(var13);
 var_listnode7 = var13;
 var14 = NEW_array__Array(&type_array__Arraykernel__Object);
 ((void (*)(val*))(var14->class->vft[COLOR_array__Array__init]))(var14) /* init on <var14:Array[Object]>*/;
-CHECK_NEW_array__Array(var14);
 var_listnode11 = var14;
 var15 = NEW_array__Array(&type_array__Arraykernel__Object);
 ((void (*)(val*))(var15->class->vft[COLOR_array__Array__init]))(var15) /* init on <var15:Array[Object]>*/;
-CHECK_NEW_array__Array(var15);
 var_listnode13 = var15;
 var_pdocnode2 = var_nodearraylist1;
 /* <var_pdocnode2:nullable Object> isa nullable ADoc */
@@ -7218,8 +7303,9 @@ var16 = var_pdocnode2->type->type_table[cltype] == idtype;
 }
 }
 if (!var16) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 14186);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13938);
+show_backtrace(1);
 }
 var_tkwredefnode3 = var_nodearraylist2;
 /* <var_tkwredefnode3:nullable Object> isa nullable TKwredef */
@@ -7235,8 +7321,9 @@ var17 = var_tkwredefnode3->type->type_table[cltype18] == idtype19;
 }
 }
 if (!var17) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 14188);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13940);
+show_backtrace(1);
 }
 var_pvisibilitynode4 = var_nodearraylist3;
 /* <var_pvisibilitynode4:nullable Object> isa nullable AVisibility */
@@ -7252,8 +7339,9 @@ var20 = var_pvisibilitynode4->type->type_table[cltype21] == idtype22;
 }
 }
 if (!var20) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 14190);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13942);
+show_backtrace(1);
 }
 var_pclasskindnode5 = var_nodearraylist4;
 /* <var_pclasskindnode5:nullable Object> isa nullable AClasskind */
@@ -7269,8 +7357,9 @@ var23 = var_pclasskindnode5->type->type_table[cltype24] == idtype25;
 }
 }
 if (!var23) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 14192);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13944);
+show_backtrace(1);
 }
 var_tclassidnode6 = var_nodearraylist7;
 /* <var_tclassidnode6:nullable Object> isa nullable TClassid */
@@ -7286,8 +7375,9 @@ var26 = var_tclassidnode6->type->type_table[cltype27] == idtype28;
 }
 }
 if (!var26) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 14194);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13946);
+show_backtrace(1);
 }
 var_pexterncodeblocknode9 = var_nodearraylist8;
 /* <var_pexterncodeblocknode9:nullable Object> isa nullable AExternCodeBlock */
@@ -7303,8 +7393,9 @@ var29 = var_pexterncodeblocknode9->type->type_table[cltype30] == idtype31;
 }
 }
 if (!var29) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 14196);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13948);
+show_backtrace(1);
 }
 var_listnode10 = var_nodearraylist9;
 /* <var_listnode10:nullable Object> isa Array[Object] */
@@ -7320,8 +7411,9 @@ var32 = var_listnode10->type->type_table[cltype33] == idtype34;
 }
 }
 if (!var32) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 14198);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13950);
+show_backtrace(1);
 }
 var35 = ((val* (*)(val*, val*, val*))(self->class->vft[COLOR_parser__ReduceAction__concat]))(self, var_listnode11, var_listnode10) /* concat on <self:ReduceAction302>*/;
 var_listnode11 = var35;
@@ -7339,8 +7431,9 @@ var36 = var_listnode12->type->type_table[cltype37] == idtype38;
 }
 }
 if (!var36) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 14201);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13953);
+show_backtrace(1);
 }
 var39 = ((val* (*)(val*, val*, val*))(self->class->vft[COLOR_parser__ReduceAction__concat]))(self, var_listnode13, var_listnode12) /* concat on <self:ReduceAction302>*/;
 var_listnode13 = var39;
@@ -7358,13 +7451,13 @@ var40 = var_tkwendnode14->type->type_table[cltype41] == idtype42;
 }
 }
 if (!var40) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 14204);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13956);
+show_backtrace(1);
 }
 var43 = NEW_parser_nodes__AStdClassdef(&type_parser_nodes__AStdClassdef);
 var44 = NULL;
 ((void (*)(val*, val*, val*, val*, val*, val*, val*, val*, val*, val*, val*, val*))(var43->class->vft[COLOR_parser_prod__AStdClassdef__init_astdclassdef]))(var43, var_pdocnode2, var_tkwredefnode3, var_pvisibilitynode4, var_pclasskindnode5, var_tclassidnode6, var_listnode7, var44, var_pexterncodeblocknode9, var_listnode11, var_listnode13, var_tkwendnode14) /* init_astdclassdef on <var43:AStdClassdef>*/;
-CHECK_NEW_parser_nodes__AStdClassdef(var43);
 var_pclassdefnode1 = var43;
 var_node_list = var_pclassdefnode1;
 var45 = self->attrs[COLOR_parser__ReduceAction___goto].l; /* _goto on <self:ReduceAction302> */
@@ -7488,15 +7581,12 @@ var13 = ((val* (*)(val*))(var_p->class->vft[COLOR_parser__Parser__pop]))(var_p)
 var_nodearraylist1 = var13;
 var14 = NEW_array__Array(&type_array__Arraykernel__Object);
 ((void (*)(val*))(var14->class->vft[COLOR_array__Array__init]))(var14) /* init on <var14:Array[Object]>*/;
-CHECK_NEW_array__Array(var14);
 var_listnode7 = var14;
 var15 = NEW_array__Array(&type_array__Arraykernel__Object);
 ((void (*)(val*))(var15->class->vft[COLOR_array__Array__init]))(var15) /* init on <var15:Array[Object]>*/;
-CHECK_NEW_array__Array(var15);
 var_listnode11 = var15;
 var16 = NEW_array__Array(&type_array__Arraykernel__Object);
 ((void (*)(val*))(var16->class->vft[COLOR_array__Array__init]))(var16) /* init on <var16:Array[Object]>*/;
-CHECK_NEW_array__Array(var16);
 var_listnode13 = var16;
 var_pdocnode2 = var_nodearraylist1;
 /* <var_pdocnode2:nullable Object> isa nullable ADoc */
@@ -7512,8 +7602,9 @@ var17 = var_pdocnode2->type->type_table[cltype] == idtype;
 }
 }
 if (!var17) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 14244);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13996);
+show_backtrace(1);
 }
 var_tkwredefnode3 = var_nodearraylist2;
 /* <var_tkwredefnode3:nullable Object> isa nullable TKwredef */
@@ -7529,8 +7620,9 @@ var18 = var_tkwredefnode3->type->type_table[cltype19] == idtype20;
 }
 }
 if (!var18) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 14246);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 13998);
+show_backtrace(1);
 }
 var_pvisibilitynode4 = var_nodearraylist3;
 /* <var_pvisibilitynode4:nullable Object> isa nullable AVisibility */
@@ -7546,8 +7638,9 @@ var21 = var_pvisibilitynode4->type->type_table[cltype22] == idtype23;
 }
 }
 if (!var21) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 14248);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 14000);
+show_backtrace(1);
 }
 var_pclasskindnode5 = var_nodearraylist4;
 /* <var_pclasskindnode5:nullable Object> isa nullable AClasskind */
@@ -7563,8 +7656,9 @@ var24 = var_pclasskindnode5->type->type_table[cltype25] == idtype26;
 }
 }
 if (!var24) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 14250);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 14002);
+show_backtrace(1);
 }
 var_tclassidnode6 = var_nodearraylist8;
 /* <var_tclassidnode6:nullable Object> isa nullable TClassid */
@@ -7580,8 +7674,9 @@ var27 = var_tclassidnode6->type->type_table[cltype28] == idtype29;
 }
 }
 if (!var27) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 14252);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 14004);
+show_backtrace(1);
 }
 var_pexterncodeblocknode9 = var_nodearraylist9;
 /* <var_pexterncodeblocknode9:nullable Object> isa nullable AExternCodeBlock */
@@ -7597,8 +7692,9 @@ var30 = var_pexterncodeblocknode9->type->type_table[cltype31] == idtype32;
 }
 }
 if (!var30) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 14254);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 14006);
+show_backtrace(1);
 }
 var_listnode10 = var_nodearraylist10;
 /* <var_listnode10:nullable Object> isa Array[Object] */
@@ -7614,8 +7710,9 @@ var33 = var_listnode10->type->type_table[cltype34] == idtype35;
 }
 }
 if (!var33) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 14256);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 14008);
+show_backtrace(1);
 }
 var36 = ((val* (*)(val*, val*, val*))(self->class->vft[COLOR_parser__ReduceAction__concat]))(self, var_listnode11, var_listnode10) /* concat on <self:ReduceAction303>*/;
 var_listnode11 = var36;
@@ -7633,8 +7730,9 @@ var37 = var_listnode12->type->type_table[cltype38] == idtype39;
 }
 }
 if (!var37) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 14259);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 14011);
+show_backtrace(1);
 }
 var40 = ((val* (*)(val*, val*, val*))(self->class->vft[COLOR_parser__ReduceAction__concat]))(self, var_listnode13, var_listnode12) /* concat on <self:ReduceAction303>*/;
 var_listnode13 = var40;
@@ -7652,13 +7750,13 @@ var41 = var_tkwendnode14->type->type_table[cltype42] == idtype43;
 }
 }
 if (!var41) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 14262);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 14014);
+show_backtrace(1);
 }
 var44 = NEW_parser_nodes__AStdClassdef(&type_parser_nodes__AStdClassdef);
 var45 = NULL;
 ((void (*)(val*, val*, val*, val*, val*, val*, val*, val*, val*, val*, val*, val*))(var44->class->vft[COLOR_parser_prod__AStdClassdef__init_astdclassdef]))(var44, var_pdocnode2, var_tkwredefnode3, var_pvisibilitynode4, var_pclasskindnode5, var_tclassidnode6, var_listnode7, var45, var_pexterncodeblocknode9, var_listnode11, var_listnode13, var_tkwendnode14) /* init_astdclassdef on <var44:AStdClassdef>*/;
-CHECK_NEW_parser_nodes__AStdClassdef(var44);
 var_pclassdefnode1 = var44;
 var_node_list = var_pclassdefnode1;
 var46 = self->attrs[COLOR_parser__ReduceAction___goto].l; /* _goto on <self:ReduceAction303> */
@@ -7776,15 +7874,12 @@ var11 = ((val* (*)(val*))(var_p->class->vft[COLOR_parser__Parser__pop]))(var_p)
 var_nodearraylist1 = var11;
 var12 = NEW_array__Array(&type_array__Arraykernel__Object);
 ((void (*)(val*))(var12->class->vft[COLOR_array__Array__init]))(var12) /* init on <var12:Array[Object]>*/;
-CHECK_NEW_array__Array(var12);
 var_listnode8 = var12;
 var13 = NEW_array__Array(&type_array__Arraykernel__Object);
 ((void (*)(val*))(var13->class->vft[COLOR_array__Array__init]))(var13) /* init on <var13:Array[Object]>*/;
-CHECK_NEW_array__Array(var13);
 var_listnode12 = var13;
 var14 = NEW_array__Array(&type_array__Arraykernel__Object);
 ((void (*)(val*))(var14->class->vft[COLOR_array__Array__init]))(var14) /* init on <var14:Array[Object]>*/;
-CHECK_NEW_array__Array(var14);
 var_listnode14 = var14;
 var_pdocnode2 = var_nodearraylist1;
 /* <var_pdocnode2:nullable Object> isa nullable ADoc */
@@ -7800,8 +7895,9 @@ var15 = var_pdocnode2->type->type_table[cltype] == idtype;
 }
 }
 if (!var15) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 14300);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 14052);
+show_backtrace(1);
 }
 var_pvisibilitynode4 = var_nodearraylist2;
 /* <var_pvisibilitynode4:nullable Object> isa nullable AVisibility */
@@ -7817,8 +7913,9 @@ var16 = var_pvisibilitynode4->type->type_table[cltype17] == idtype18;
 }
 }
 if (!var16) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 14302);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 14054);
+show_backtrace(1);
 }
 var_pclasskindnode5 = var_nodearraylist3;
 /* <var_pclasskindnode5:nullable Object> isa nullable AClasskind */
@@ -7834,8 +7931,9 @@ var19 = var_pclasskindnode5->type->type_table[cltype20] == idtype21;
 }
 }
 if (!var19) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 14304);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 14056);
+show_backtrace(1);
 }
 var_tclassidnode6 = var_nodearraylist5;
 /* <var_tclassidnode6:nullable Object> isa nullable TClassid */
@@ -7851,8 +7949,9 @@ var22 = var_tclassidnode6->type->type_table[cltype23] == idtype24;
 }
 }
 if (!var22) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 14306);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 14058);
+show_backtrace(1);
 }
 var_listnode7 = var_nodearraylist6;
 /* <var_listnode7:nullable Object> isa Array[Object] */
@@ -7868,8 +7967,9 @@ var25 = var_listnode7->type->type_table[cltype26] == idtype27;
 }
 }
 if (!var25) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 14308);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 14060);
+show_backtrace(1);
 }
 var28 = ((val* (*)(val*, val*, val*))(self->class->vft[COLOR_parser__ReduceAction__concat]))(self, var_listnode8, var_listnode7) /* concat on <self:ReduceAction305>*/;
 var_listnode8 = var28;
@@ -7887,8 +7987,9 @@ var29 = var_pexterncodeblocknode10->type->type_table[cltype30] == idtype31;
 }
 }
 if (!var29) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 14311);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 14063);
+show_backtrace(1);
 }
 var_listnode11 = var_nodearraylist8;
 /* <var_listnode11:nullable Object> isa Array[Object] */
@@ -7904,8 +8005,9 @@ var32 = var_listnode11->type->type_table[cltype33] == idtype34;
 }
 }
 if (!var32) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 14313);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 14065);
+show_backtrace(1);
 }
 var35 = ((val* (*)(val*, val*, val*))(self->class->vft[COLOR_parser__ReduceAction__concat]))(self, var_listnode12, var_listnode11) /* concat on <self:ReduceAction305>*/;
 var_listnode12 = var35;
@@ -7923,8 +8025,9 @@ var36 = var_listnode13->type->type_table[cltype37] == idtype38;
 }
 }
 if (!var36) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 14316);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 14068);
+show_backtrace(1);
 }
 var39 = ((val* (*)(val*, val*, val*))(self->class->vft[COLOR_parser__ReduceAction__concat]))(self, var_listnode14, var_listnode13) /* concat on <self:ReduceAction305>*/;
 var_listnode14 = var39;
@@ -7942,14 +8045,14 @@ var40 = var_tkwendnode15->type->type_table[cltype41] == idtype42;
 }
 }
 if (!var40) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 14319);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 14071);
+show_backtrace(1);
 }
 var43 = NEW_parser_nodes__AStdClassdef(&type_parser_nodes__AStdClassdef);
 var44 = NULL;
 var45 = NULL;
 ((void (*)(val*, val*, val*, val*, val*, val*, val*, val*, val*, val*, val*, val*))(var43->class->vft[COLOR_parser_prod__AStdClassdef__init_astdclassdef]))(var43, var_pdocnode2, var44, var_pvisibilitynode4, var_pclasskindnode5, var_tclassidnode6, var_listnode8, var45, var_pexterncodeblocknode10, var_listnode12, var_listnode14, var_tkwendnode15) /* init_astdclassdef on <var43:AStdClassdef>*/;
-CHECK_NEW_parser_nodes__AStdClassdef(var43);
 var_pclassdefnode1 = var43;
 var_node_list = var_pclassdefnode1;
 var46 = self->attrs[COLOR_parser__ReduceAction___goto].l; /* _goto on <self:ReduceAction305> */
@@ -8074,15 +8177,12 @@ var12 = ((val* (*)(val*))(var_p->class->vft[COLOR_parser__Parser__pop]))(var_p)
 var_nodearraylist1 = var12;
 var13 = NEW_array__Array(&type_array__Arraykernel__Object);
 ((void (*)(val*))(var13->class->vft[COLOR_array__Array__init]))(var13) /* init on <var13:Array[Object]>*/;
-CHECK_NEW_array__Array(var13);
 var_listnode8 = var13;
 var14 = NEW_array__Array(&type_array__Arraykernel__Object);
 ((void (*)(val*))(var14->class->vft[COLOR_array__Array__init]))(var14) /* init on <var14:Array[Object]>*/;
-CHECK_NEW_array__Array(var14);
 var_listnode12 = var14;
 var15 = NEW_array__Array(&type_array__Arraykernel__Object);
 ((void (*)(val*))(var15->class->vft[COLOR_array__Array__init]))(var15) /* init on <var15:Array[Object]>*/;
-CHECK_NEW_array__Array(var15);
 var_listnode14 = var15;
 var_pdocnode2 = var_nodearraylist1;
 /* <var_pdocnode2:nullable Object> isa nullable ADoc */
@@ -8098,8 +8198,9 @@ var16 = var_pdocnode2->type->type_table[cltype] == idtype;
 }
 }
 if (!var16) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 14358);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 14110);
+show_backtrace(1);
 }
 var_tkwredefnode3 = var_nodearraylist2;
 /* <var_tkwredefnode3:nullable Object> isa nullable TKwredef */
@@ -8115,8 +8216,9 @@ var17 = var_tkwredefnode3->type->type_table[cltype18] == idtype19;
 }
 }
 if (!var17) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 14360);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 14112);
+show_backtrace(1);
 }
 var_pvisibilitynode4 = var_nodearraylist3;
 /* <var_pvisibilitynode4:nullable Object> isa nullable AVisibility */
@@ -8132,8 +8234,9 @@ var20 = var_pvisibilitynode4->type->type_table[cltype21] == idtype22;
 }
 }
 if (!var20) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 14362);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 14114);
+show_backtrace(1);
 }
 var_pclasskindnode5 = var_nodearraylist4;
 /* <var_pclasskindnode5:nullable Object> isa nullable AClasskind */
@@ -8149,8 +8252,9 @@ var23 = var_pclasskindnode5->type->type_table[cltype24] == idtype25;
 }
 }
 if (!var23) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 14364);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 14116);
+show_backtrace(1);
 }
 var_tclassidnode6 = var_nodearraylist6;
 /* <var_tclassidnode6:nullable Object> isa nullable TClassid */
@@ -8166,8 +8270,9 @@ var26 = var_tclassidnode6->type->type_table[cltype27] == idtype28;
 }
 }
 if (!var26) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 14366);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 14118);
+show_backtrace(1);
 }
 var_listnode7 = var_nodearraylist7;
 /* <var_listnode7:nullable Object> isa Array[Object] */
@@ -8183,8 +8288,9 @@ var29 = var_listnode7->type->type_table[cltype30] == idtype31;
 }
 }
 if (!var29) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 14368);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 14120);
+show_backtrace(1);
 }
 var32 = ((val* (*)(val*, val*, val*))(self->class->vft[COLOR_parser__ReduceAction__concat]))(self, var_listnode8, var_listnode7) /* concat on <self:ReduceAction306>*/;
 var_listnode8 = var32;
@@ -8202,8 +8308,9 @@ var33 = var_pexterncodeblocknode10->type->type_table[cltype34] == idtype35;
 }
 }
 if (!var33) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 14371);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 14123);
+show_backtrace(1);
 }
 var_listnode11 = var_nodearraylist9;
 /* <var_listnode11:nullable Object> isa Array[Object] */
@@ -8219,8 +8326,9 @@ var36 = var_listnode11->type->type_table[cltype37] == idtype38;
 }
 }
 if (!var36) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 14373);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 14125);
+show_backtrace(1);
 }
 var39 = ((val* (*)(val*, val*, val*))(self->class->vft[COLOR_parser__ReduceAction__concat]))(self, var_listnode12, var_listnode11) /* concat on <self:ReduceAction306>*/;
 var_listnode12 = var39;
@@ -8238,8 +8346,9 @@ var40 = var_listnode13->type->type_table[cltype41] == idtype42;
 }
 }
 if (!var40) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 14376);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 14128);
+show_backtrace(1);
 }
 var43 = ((val* (*)(val*, val*, val*))(self->class->vft[COLOR_parser__ReduceAction__concat]))(self, var_listnode14, var_listnode13) /* concat on <self:ReduceAction306>*/;
 var_listnode14 = var43;
@@ -8257,13 +8366,13 @@ var44 = var_tkwendnode15->type->type_table[cltype45] == idtype46;
 }
 }
 if (!var44) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 14379);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 14131);
+show_backtrace(1);
 }
 var47 = NEW_parser_nodes__AStdClassdef(&type_parser_nodes__AStdClassdef);
 var48 = NULL;
 ((void (*)(val*, val*, val*, val*, val*, val*, val*, val*, val*, val*, val*, val*))(var47->class->vft[COLOR_parser_prod__AStdClassdef__init_astdclassdef]))(var47, var_pdocnode2, var_tkwredefnode3, var_pvisibilitynode4, var_pclasskindnode5, var_tclassidnode6, var_listnode8, var48, var_pexterncodeblocknode10, var_listnode12, var_listnode14, var_tkwendnode15) /* init_astdclassdef on <var47:AStdClassdef>*/;
-CHECK_NEW_parser_nodes__AStdClassdef(var47);
 var_pclassdefnode1 = var47;
 var_node_list = var_pclassdefnode1;
 var49 = self->attrs[COLOR_parser__ReduceAction___goto].l; /* _goto on <self:ReduceAction306> */
@@ -8385,15 +8494,12 @@ var12 = ((val* (*)(val*))(var_p->class->vft[COLOR_parser__Parser__pop]))(var_p)
 var_nodearraylist1 = var12;
 var13 = NEW_array__Array(&type_array__Arraykernel__Object);
 ((void (*)(val*))(var13->class->vft[COLOR_array__Array__init]))(var13) /* init on <var13:Array[Object]>*/;
-CHECK_NEW_array__Array(var13);
 var_listnode8 = var13;
 var14 = NEW_array__Array(&type_array__Arraykernel__Object);
 ((void (*)(val*))(var14->class->vft[COLOR_array__Array__init]))(var14) /* init on <var14:Array[Object]>*/;
-CHECK_NEW_array__Array(var14);
 var_listnode12 = var14;
 var15 = NEW_array__Array(&type_array__Arraykernel__Object);
 ((void (*)(val*))(var15->class->vft[COLOR_array__Array__init]))(var15) /* init on <var15:Array[Object]>*/;
-CHECK_NEW_array__Array(var15);
 var_listnode14 = var15;
 var_pdocnode2 = var_nodearraylist1;
 /* <var_pdocnode2:nullable Object> isa nullable ADoc */
@@ -8409,8 +8515,9 @@ var16 = var_pdocnode2->type->type_table[cltype] == idtype;
 }
 }
 if (!var16) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 14418);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 14170);
+show_backtrace(1);
 }
 var_pvisibilitynode4 = var_nodearraylist2;
 /* <var_pvisibilitynode4:nullable Object> isa nullable AVisibility */
@@ -8426,8 +8533,9 @@ var17 = var_pvisibilitynode4->type->type_table[cltype18] == idtype19;
 }
 }
 if (!var17) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 14420);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 14172);
+show_backtrace(1);
 }
 var_pclasskindnode5 = var_nodearraylist3;
 /* <var_pclasskindnode5:nullable Object> isa nullable AClasskind */
@@ -8443,8 +8551,9 @@ var20 = var_pclasskindnode5->type->type_table[cltype21] == idtype22;
 }
 }
 if (!var20) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 14422);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 14174);
+show_backtrace(1);
 }
 var_tclassidnode6 = var_nodearraylist6;
 /* <var_tclassidnode6:nullable Object> isa nullable TClassid */
@@ -8460,8 +8569,9 @@ var23 = var_tclassidnode6->type->type_table[cltype24] == idtype25;
 }
 }
 if (!var23) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 14424);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 14176);
+show_backtrace(1);
 }
 var_listnode7 = var_nodearraylist7;
 /* <var_listnode7:nullable Object> isa Array[Object] */
@@ -8477,8 +8587,9 @@ var26 = var_listnode7->type->type_table[cltype27] == idtype28;
 }
 }
 if (!var26) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 14426);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 14178);
+show_backtrace(1);
 }
 var29 = ((val* (*)(val*, val*, val*))(self->class->vft[COLOR_parser__ReduceAction__concat]))(self, var_listnode8, var_listnode7) /* concat on <self:ReduceAction307>*/;
 var_listnode8 = var29;
@@ -8496,8 +8607,9 @@ var30 = var_pexterncodeblocknode10->type->type_table[cltype31] == idtype32;
 }
 }
 if (!var30) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 14429);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 14181);
+show_backtrace(1);
 }
 var_listnode11 = var_nodearraylist9;
 /* <var_listnode11:nullable Object> isa Array[Object] */
@@ -8513,8 +8625,9 @@ var33 = var_listnode11->type->type_table[cltype34] == idtype35;
 }
 }
 if (!var33) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 14431);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 14183);
+show_backtrace(1);
 }
 var36 = ((val* (*)(val*, val*, val*))(self->class->vft[COLOR_parser__ReduceAction__concat]))(self, var_listnode12, var_listnode11) /* concat on <self:ReduceAction307>*/;
 var_listnode12 = var36;
@@ -8532,8 +8645,9 @@ var37 = var_listnode13->type->type_table[cltype38] == idtype39;
 }
 }
 if (!var37) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 14434);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 14186);
+show_backtrace(1);
 }
 var40 = ((val* (*)(val*, val*, val*))(self->class->vft[COLOR_parser__ReduceAction__concat]))(self, var_listnode14, var_listnode13) /* concat on <self:ReduceAction307>*/;
 var_listnode14 = var40;
@@ -8551,14 +8665,14 @@ var41 = var_tkwendnode15->type->type_table[cltype42] == idtype43;
 }
 }
 if (!var41) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 14437);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 14189);
+show_backtrace(1);
 }
 var44 = NEW_parser_nodes__AStdClassdef(&type_parser_nodes__AStdClassdef);
 var45 = NULL;
 var46 = NULL;
 ((void (*)(val*, val*, val*, val*, val*, val*, val*, val*, val*, val*, val*, val*))(var44->class->vft[COLOR_parser_prod__AStdClassdef__init_astdclassdef]))(var44, var_pdocnode2, var45, var_pvisibilitynode4, var_pclasskindnode5, var_tclassidnode6, var_listnode8, var46, var_pexterncodeblocknode10, var_listnode12, var_listnode14, var_tkwendnode15) /* init_astdclassdef on <var44:AStdClassdef>*/;
-CHECK_NEW_parser_nodes__AStdClassdef(var44);
 var_pclassdefnode1 = var44;
 var_node_list = var_pclassdefnode1;
 var47 = self->attrs[COLOR_parser__ReduceAction___goto].l; /* _goto on <self:ReduceAction307> */
@@ -8684,15 +8798,12 @@ var13 = ((val* (*)(val*))(var_p->class->vft[COLOR_parser__Parser__pop]))(var_p)
 var_nodearraylist1 = var13;
 var14 = NEW_array__Array(&type_array__Arraykernel__Object);
 ((void (*)(val*))(var14->class->vft[COLOR_array__Array__init]))(var14) /* init on <var14:Array[Object]>*/;
-CHECK_NEW_array__Array(var14);
 var_listnode8 = var14;
 var15 = NEW_array__Array(&type_array__Arraykernel__Object);
 ((void (*)(val*))(var15->class->vft[COLOR_array__Array__init]))(var15) /* init on <var15:Array[Object]>*/;
-CHECK_NEW_array__Array(var15);
 var_listnode12 = var15;
 var16 = NEW_array__Array(&type_array__Arraykernel__Object);
 ((void (*)(val*))(var16->class->vft[COLOR_array__Array__init]))(var16) /* init on <var16:Array[Object]>*/;
-CHECK_NEW_array__Array(var16);
 var_listnode14 = var16;
 var_pdocnode2 = var_nodearraylist1;
 /* <var_pdocnode2:nullable Object> isa nullable ADoc */
@@ -8708,8 +8819,9 @@ var17 = var_pdocnode2->type->type_table[cltype] == idtype;
 }
 }
 if (!var17) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 14477);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 14229);
+show_backtrace(1);
 }
 var_pvisibilitynode4 = var_nodearraylist2;
 /* <var_pvisibilitynode4:nullable Object> isa nullable AVisibility */
@@ -8725,8 +8837,9 @@ var18 = var_pvisibilitynode4->type->type_table[cltype19] == idtype20;
 }
 }
 if (!var18) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 14479);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 14231);
+show_backtrace(1);
 }
 var_pclasskindnode5 = var_nodearraylist3;
 /* <var_pclasskindnode5:nullable Object> isa nullable AClasskind */
@@ -8742,8 +8855,9 @@ var21 = var_pclasskindnode5->type->type_table[cltype22] == idtype23;
 }
 }
 if (!var21) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 14481);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 14233);
+show_backtrace(1);
 }
 var_tclassidnode6 = var_nodearraylist7;
 /* <var_tclassidnode6:nullable Object> isa nullable TClassid */
@@ -8759,8 +8873,9 @@ var24 = var_tclassidnode6->type->type_table[cltype25] == idtype26;
 }
 }
 if (!var24) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 14483);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 14235);
+show_backtrace(1);
 }
 var_listnode7 = var_nodearraylist8;
 /* <var_listnode7:nullable Object> isa Array[Object] */
@@ -8776,8 +8891,9 @@ var27 = var_listnode7->type->type_table[cltype28] == idtype29;
 }
 }
 if (!var27) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 14485);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 14237);
+show_backtrace(1);
 }
 var30 = ((val* (*)(val*, val*, val*))(self->class->vft[COLOR_parser__ReduceAction__concat]))(self, var_listnode8, var_listnode7) /* concat on <self:ReduceAction308>*/;
 var_listnode8 = var30;
@@ -8795,8 +8911,9 @@ var31 = var_pexterncodeblocknode10->type->type_table[cltype32] == idtype33;
 }
 }
 if (!var31) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 14488);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 14240);
+show_backtrace(1);
 }
 var_listnode11 = var_nodearraylist10;
 /* <var_listnode11:nullable Object> isa Array[Object] */
@@ -8812,8 +8929,9 @@ var34 = var_listnode11->type->type_table[cltype35] == idtype36;
 }
 }
 if (!var34) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 14490);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 14242);
+show_backtrace(1);
 }
 var37 = ((val* (*)(val*, val*, val*))(self->class->vft[COLOR_parser__ReduceAction__concat]))(self, var_listnode12, var_listnode11) /* concat on <self:ReduceAction308>*/;
 var_listnode12 = var37;
@@ -8831,8 +8949,9 @@ var38 = var_listnode13->type->type_table[cltype39] == idtype40;
 }
 }
 if (!var38) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 14493);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 14245);
+show_backtrace(1);
 }
 var41 = ((val* (*)(val*, val*, val*))(self->class->vft[COLOR_parser__ReduceAction__concat]))(self, var_listnode14, var_listnode13) /* concat on <self:ReduceAction308>*/;
 var_listnode14 = var41;
@@ -8850,14 +8969,14 @@ var42 = var_tkwendnode15->type->type_table[cltype43] == idtype44;
 }
 }
 if (!var42) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 14496);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 14248);
+show_backtrace(1);
 }
 var45 = NEW_parser_nodes__AStdClassdef(&type_parser_nodes__AStdClassdef);
 var46 = NULL;
 var47 = NULL;
 ((void (*)(val*, val*, val*, val*, val*, val*, val*, val*, val*, val*, val*, val*))(var45->class->vft[COLOR_parser_prod__AStdClassdef__init_astdclassdef]))(var45, var_pdocnode2, var46, var_pvisibilitynode4, var_pclasskindnode5, var_tclassidnode6, var_listnode8, var47, var_pexterncodeblocknode10, var_listnode12, var_listnode14, var_tkwendnode15) /* init_astdclassdef on <var45:AStdClassdef>*/;
-CHECK_NEW_parser_nodes__AStdClassdef(var45);
 var_pclassdefnode1 = var45;
 var_node_list = var_pclassdefnode1;
 var48 = self->attrs[COLOR_parser__ReduceAction___goto].l; /* _goto on <self:ReduceAction308> */
@@ -8986,15 +9105,12 @@ var13 = ((val* (*)(val*))(var_p->class->vft[COLOR_parser__Parser__pop]))(var_p)
 var_nodearraylist1 = var13;
 var14 = NEW_array__Array(&type_array__Arraykernel__Object);
 ((void (*)(val*))(var14->class->vft[COLOR_array__Array__init]))(var14) /* init on <var14:Array[Object]>*/;
-CHECK_NEW_array__Array(var14);
 var_listnode8 = var14;
 var15 = NEW_array__Array(&type_array__Arraykernel__Object);
 ((void (*)(val*))(var15->class->vft[COLOR_array__Array__init]))(var15) /* init on <var15:Array[Object]>*/;
-CHECK_NEW_array__Array(var15);
 var_listnode12 = var15;
 var16 = NEW_array__Array(&type_array__Arraykernel__Object);
 ((void (*)(val*))(var16->class->vft[COLOR_array__Array__init]))(var16) /* init on <var16:Array[Object]>*/;
-CHECK_NEW_array__Array(var16);
 var_listnode14 = var16;
 var_pdocnode2 = var_nodearraylist1;
 /* <var_pdocnode2:nullable Object> isa nullable ADoc */
@@ -9010,8 +9126,9 @@ var17 = var_pdocnode2->type->type_table[cltype] == idtype;
 }
 }
 if (!var17) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 14536);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 14288);
+show_backtrace(1);
 }
 var_tkwredefnode3 = var_nodearraylist2;
 /* <var_tkwredefnode3:nullable Object> isa nullable TKwredef */
@@ -9027,8 +9144,9 @@ var18 = var_tkwredefnode3->type->type_table[cltype19] == idtype20;
 }
 }
 if (!var18) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 14538);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 14290);
+show_backtrace(1);
 }
 var_pvisibilitynode4 = var_nodearraylist3;
 /* <var_pvisibilitynode4:nullable Object> isa nullable AVisibility */
@@ -9044,8 +9162,9 @@ var21 = var_pvisibilitynode4->type->type_table[cltype22] == idtype23;
 }
 }
 if (!var21) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 14540);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 14292);
+show_backtrace(1);
 }
 var_pclasskindnode5 = var_nodearraylist4;
 /* <var_pclasskindnode5:nullable Object> isa nullable AClasskind */
@@ -9061,8 +9180,9 @@ var24 = var_pclasskindnode5->type->type_table[cltype25] == idtype26;
 }
 }
 if (!var24) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 14542);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 14294);
+show_backtrace(1);
 }
 var_tclassidnode6 = var_nodearraylist7;
 /* <var_tclassidnode6:nullable Object> isa nullable TClassid */
@@ -9078,8 +9198,9 @@ var27 = var_tclassidnode6->type->type_table[cltype28] == idtype29;
 }
 }
 if (!var27) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 14544);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 14296);
+show_backtrace(1);
 }
 var_listnode7 = var_nodearraylist8;
 /* <var_listnode7:nullable Object> isa Array[Object] */
@@ -9095,8 +9216,9 @@ var30 = var_listnode7->type->type_table[cltype31] == idtype32;
 }
 }
 if (!var30) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 14546);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 14298);
+show_backtrace(1);
 }
 var33 = ((val* (*)(val*, val*, val*))(self->class->vft[COLOR_parser__ReduceAction__concat]))(self, var_listnode8, var_listnode7) /* concat on <self:ReduceAction310>*/;
 var_listnode8 = var33;
@@ -9114,8 +9236,9 @@ var34 = var_pexterncodeblocknode10->type->type_table[cltype35] == idtype36;
 }
 }
 if (!var34) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 14549);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 14301);
+show_backtrace(1);
 }
 var_listnode11 = var_nodearraylist10;
 /* <var_listnode11:nullable Object> isa Array[Object] */
@@ -9131,8 +9254,9 @@ var37 = var_listnode11->type->type_table[cltype38] == idtype39;
 }
 }
 if (!var37) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 14551);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 14303);
+show_backtrace(1);
 }
 var40 = ((val* (*)(val*, val*, val*))(self->class->vft[COLOR_parser__ReduceAction__concat]))(self, var_listnode12, var_listnode11) /* concat on <self:ReduceAction310>*/;
 var_listnode12 = var40;
@@ -9150,8 +9274,9 @@ var41 = var_listnode13->type->type_table[cltype42] == idtype43;
 }
 }
 if (!var41) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 14554);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 14306);
+show_backtrace(1);
 }
 var44 = ((val* (*)(val*, val*, val*))(self->class->vft[COLOR_parser__ReduceAction__concat]))(self, var_listnode14, var_listnode13) /* concat on <self:ReduceAction310>*/;
 var_listnode14 = var44;
@@ -9169,13 +9294,13 @@ var45 = var_tkwendnode15->type->type_table[cltype46] == idtype47;
 }
 }
 if (!var45) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 14557);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 14309);
+show_backtrace(1);
 }
 var48 = NEW_parser_nodes__AStdClassdef(&type_parser_nodes__AStdClassdef);
 var49 = NULL;
 ((void (*)(val*, val*, val*, val*, val*, val*, val*, val*, val*, val*, val*, val*))(var48->class->vft[COLOR_parser_prod__AStdClassdef__init_astdclassdef]))(var48, var_pdocnode2, var_tkwredefnode3, var_pvisibilitynode4, var_pclasskindnode5, var_tclassidnode6, var_listnode8, var49, var_pexterncodeblocknode10, var_listnode12, var_listnode14, var_tkwendnode15) /* init_astdclassdef on <var48:AStdClassdef>*/;
-CHECK_NEW_parser_nodes__AStdClassdef(var48);
 var_pclassdefnode1 = var48;
 var_node_list = var_pclassdefnode1;
 var50 = self->attrs[COLOR_parser__ReduceAction___goto].l; /* _goto on <self:ReduceAction310> */
@@ -9308,15 +9433,12 @@ var14 = ((val* (*)(val*))(var_p->class->vft[COLOR_parser__Parser__pop]))(var_p)
 var_nodearraylist1 = var14;
 var15 = NEW_array__Array(&type_array__Arraykernel__Object);
 ((void (*)(val*))(var15->class->vft[COLOR_array__Array__init]))(var15) /* init on <var15:Array[Object]>*/;
-CHECK_NEW_array__Array(var15);
 var_listnode8 = var15;
 var16 = NEW_array__Array(&type_array__Arraykernel__Object);
 ((void (*)(val*))(var16->class->vft[COLOR_array__Array__init]))(var16) /* init on <var16:Array[Object]>*/;
-CHECK_NEW_array__Array(var16);
 var_listnode12 = var16;
 var17 = NEW_array__Array(&type_array__Arraykernel__Object);
 ((void (*)(val*))(var17->class->vft[COLOR_array__Array__init]))(var17) /* init on <var17:Array[Object]>*/;
-CHECK_NEW_array__Array(var17);
 var_listnode14 = var17;
 var_pdocnode2 = var_nodearraylist1;
 /* <var_pdocnode2:nullable Object> isa nullable ADoc */
@@ -9332,8 +9454,9 @@ var18 = var_pdocnode2->type->type_table[cltype] == idtype;
 }
 }
 if (!var18) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 14598);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 14350);
+show_backtrace(1);
 }
 var_tkwredefnode3 = var_nodearraylist2;
 /* <var_tkwredefnode3:nullable Object> isa nullable TKwredef */
@@ -9349,8 +9472,9 @@ var19 = var_tkwredefnode3->type->type_table[cltype20] == idtype21;
 }
 }
 if (!var19) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 14600);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 14352);
+show_backtrace(1);
 }
 var_pvisibilitynode4 = var_nodearraylist3;
 /* <var_pvisibilitynode4:nullable Object> isa nullable AVisibility */
@@ -9366,8 +9490,9 @@ var22 = var_pvisibilitynode4->type->type_table[cltype23] == idtype24;
 }
 }
 if (!var22) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 14602);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 14354);
+show_backtrace(1);
 }
 var_pclasskindnode5 = var_nodearraylist4;
 /* <var_pclasskindnode5:nullable Object> isa nullable AClasskind */
@@ -9383,8 +9508,9 @@ var25 = var_pclasskindnode5->type->type_table[cltype26] == idtype27;
 }
 }
 if (!var25) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 14604);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 14356);
+show_backtrace(1);
 }
 var_tclassidnode6 = var_nodearraylist8;
 /* <var_tclassidnode6:nullable Object> isa nullable TClassid */
@@ -9400,8 +9526,9 @@ var28 = var_tclassidnode6->type->type_table[cltype29] == idtype30;
 }
 }
 if (!var28) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 14606);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 14358);
+show_backtrace(1);
 }
 var_listnode7 = var_nodearraylist9;
 /* <var_listnode7:nullable Object> isa Array[Object] */
@@ -9417,8 +9544,9 @@ var31 = var_listnode7->type->type_table[cltype32] == idtype33;
 }
 }
 if (!var31) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 14608);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 14360);
+show_backtrace(1);
 }
 var34 = ((val* (*)(val*, val*, val*))(self->class->vft[COLOR_parser__ReduceAction__concat]))(self, var_listnode8, var_listnode7) /* concat on <self:ReduceAction311>*/;
 var_listnode8 = var34;
@@ -9436,8 +9564,9 @@ var35 = var_pexterncodeblocknode10->type->type_table[cltype36] == idtype37;
 }
 }
 if (!var35) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 14611);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 14363);
+show_backtrace(1);
 }
 var_listnode11 = var_nodearraylist11;
 /* <var_listnode11:nullable Object> isa Array[Object] */
@@ -9453,8 +9582,9 @@ var38 = var_listnode11->type->type_table[cltype39] == idtype40;
 }
 }
 if (!var38) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 14613);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 14365);
+show_backtrace(1);
 }
 var41 = ((val* (*)(val*, val*, val*))(self->class->vft[COLOR_parser__ReduceAction__concat]))(self, var_listnode12, var_listnode11) /* concat on <self:ReduceAction311>*/;
 var_listnode12 = var41;
@@ -9472,8 +9602,9 @@ var42 = var_listnode13->type->type_table[cltype43] == idtype44;
 }
 }
 if (!var42) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 14616);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 14368);
+show_backtrace(1);
 }
 var45 = ((val* (*)(val*, val*, val*))(self->class->vft[COLOR_parser__ReduceAction__concat]))(self, var_listnode14, var_listnode13) /* concat on <self:ReduceAction311>*/;
 var_listnode14 = var45;
@@ -9491,13 +9622,13 @@ var46 = var_tkwendnode15->type->type_table[cltype47] == idtype48;
 }
 }
 if (!var46) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 14619);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 14371);
+show_backtrace(1);
 }
 var49 = NEW_parser_nodes__AStdClassdef(&type_parser_nodes__AStdClassdef);
 var50 = NULL;
 ((void (*)(val*, val*, val*, val*, val*, val*, val*, val*, val*, val*, val*, val*))(var49->class->vft[COLOR_parser_prod__AStdClassdef__init_astdclassdef]))(var49, var_pdocnode2, var_tkwredefnode3, var_pvisibilitynode4, var_pclasskindnode5, var_tclassidnode6, var_listnode8, var50, var_pexterncodeblocknode10, var_listnode12, var_listnode14, var_tkwendnode15) /* init_astdclassdef on <var49:AStdClassdef>*/;
-CHECK_NEW_parser_nodes__AStdClassdef(var49);
 var_pclassdefnode1 = var49;
 var_node_list = var_pclassdefnode1;
 var51 = self->attrs[COLOR_parser__ReduceAction___goto].l; /* _goto on <self:ReduceAction311> */
@@ -9621,15 +9752,12 @@ var11 = ((val* (*)(val*))(var_p->class->vft[COLOR_parser__Parser__pop]))(var_p)
 var_nodearraylist1 = var11;
 var12 = NEW_array__Array(&type_array__Arraykernel__Object);
 ((void (*)(val*))(var12->class->vft[COLOR_array__Array__init]))(var12) /* init on <var12:Array[Object]>*/;
-CHECK_NEW_array__Array(var12);
 var_listnode7 = var12;
 var13 = NEW_array__Array(&type_array__Arraykernel__Object);
 ((void (*)(val*))(var13->class->vft[COLOR_array__Array__init]))(var13) /* init on <var13:Array[Object]>*/;
-CHECK_NEW_array__Array(var13);
 var_listnode16 = var13;
 var14 = NEW_array__Array(&type_array__Arraykernel__Object);
 ((void (*)(val*))(var14->class->vft[COLOR_array__Array__init]))(var14) /* init on <var14:Array[Object]>*/;
-CHECK_NEW_array__Array(var14);
 var_listnode18 = var14;
 var_pdocnode2 = var_nodearraylist1;
 /* <var_pdocnode2:nullable Object> isa nullable ADoc */
@@ -9645,8 +9773,9 @@ var15 = var_pdocnode2->type->type_table[cltype] == idtype;
 }
 }
 if (!var15) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 14657);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 14409);
+show_backtrace(1);
 }
 var_pvisibilitynode4 = var_nodearraylist2;
 /* <var_pvisibilitynode4:nullable Object> isa nullable AVisibility */
@@ -9662,8 +9791,9 @@ var16 = var_pvisibilitynode4->type->type_table[cltype17] == idtype18;
 }
 }
 if (!var16) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 14659);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 14411);
+show_backtrace(1);
 }
 var_pclasskindnode5 = var_nodearraylist3;
 /* <var_pclasskindnode5:nullable Object> isa nullable AClasskind */
@@ -9679,8 +9809,9 @@ var19 = var_pclasskindnode5->type->type_table[cltype20] == idtype21;
 }
 }
 if (!var19) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 14661);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 14413);
+show_backtrace(1);
 }
 var_tclassidnode6 = var_nodearraylist5;
 /* <var_tclassidnode6:nullable Object> isa nullable TClassid */
@@ -9696,12 +9827,12 @@ var22 = var_tclassidnode6->type->type_table[cltype23] == idtype24;
 }
 }
 if (!var22) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 14663);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 14415);
+show_backtrace(1);
 }
 var25 = NEW_array__Array(&type_array__Arraykernel__Object);
 ((void (*)(val*))(var25->class->vft[COLOR_array__Array__init]))(var25) /* init on <var25:Array[Object]>*/;
-CHECK_NEW_array__Array(var25);
 var_listnode12 = var25;
 var_listnode11 = var_nodearraylist6;
 /* <var_listnode11:nullable Object> isa Array[Object] */
@@ -9717,8 +9848,9 @@ var26 = var_listnode11->type->type_table[cltype27] == idtype28;
 }
 }
 if (!var26) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 14666);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 14418);
+show_backtrace(1);
 }
 var29 = ((val* (*)(val*, val*, val*))(self->class->vft[COLOR_parser__ReduceAction__concat]))(self, var_listnode12, var_listnode11) /* concat on <self:ReduceAction313>*/;
 var_listnode12 = var29;
@@ -9727,7 +9859,6 @@ var31 = NULL;
 var32 = NULL;
 var33 = NULL;
 ((void (*)(val*, val*, val*, val*, val*))(var30->class->vft[COLOR_parser_prod__AAnnotations__init_aannotations]))(var30, var31, var32, var_listnode12, var33) /* init_aannotations on <var30:AAnnotations>*/;
-CHECK_NEW_parser_nodes__AAnnotations(var30);
 var_pannotationsnode8 = var30;
 var_pexterncodeblocknode14 = var_nodearraylist7;
 /* <var_pexterncodeblocknode14:nullable Object> isa nullable AExternCodeBlock */
@@ -9743,8 +9874,9 @@ var34 = var_pexterncodeblocknode14->type->type_table[cltype35] == idtype36;
 }
 }
 if (!var34) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 14675);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 14427);
+show_backtrace(1);
 }
 var_listnode15 = var_nodearraylist8;
 /* <var_listnode15:nullable Object> isa Array[Object] */
@@ -9760,8 +9892,9 @@ var37 = var_listnode15->type->type_table[cltype38] == idtype39;
 }
 }
 if (!var37) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 14677);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 14429);
+show_backtrace(1);
 }
 var40 = ((val* (*)(val*, val*, val*))(self->class->vft[COLOR_parser__ReduceAction__concat]))(self, var_listnode16, var_listnode15) /* concat on <self:ReduceAction313>*/;
 var_listnode16 = var40;
@@ -9779,8 +9912,9 @@ var41 = var_listnode17->type->type_table[cltype42] == idtype43;
 }
 }
 if (!var41) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 14680);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 14432);
+show_backtrace(1);
 }
 var44 = ((val* (*)(val*, val*, val*))(self->class->vft[COLOR_parser__ReduceAction__concat]))(self, var_listnode18, var_listnode17) /* concat on <self:ReduceAction313>*/;
 var_listnode18 = var44;
@@ -9798,13 +9932,13 @@ var45 = var_tkwendnode19->type->type_table[cltype46] == idtype47;
 }
 }
 if (!var45) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "src/parser/parser.nit", 14683);
-exit(1);
+fprintf(stderr, "Runtime error: %s", "Assert failed");
+fprintf(stderr, " (%s:%d)\n", "src/parser/parser.nit", 14435);
+show_backtrace(1);
 }
 var48 = NEW_parser_nodes__AStdClassdef(&type_parser_nodes__AStdClassdef);
 var49 = NULL;
 ((void (*)(val*, val*, val*, val*, val*, val*, val*, val*, val*, val*, val*, val*))(var48->class->vft[COLOR_parser_prod__AStdClassdef__init_astdclassdef]))(var48, var_pdocnode2, var49, var_pvisibilitynode4, var_pclasskindnode5, var_tclassidnode6, var_listnode7, var_pannotationsnode8, var_pexterncodeblocknode14, var_listnode16, var_listnode18, var_tkwendnode19) /* init_astdclassdef on <var48:AStdClassdef>*/;
-CHECK_NEW_parser_nodes__AStdClassdef(var48);
 var_pclassdefnode1 = var48;
 var_node_list = var_pclassdefnode1;
 var50 = self->attrs[COLOR_parser__ReduceAction___goto].l; /* _goto on <self:ReduceAction313> */