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

diff --git a/c_src/standard__hash_collection.sep.1.c b/c_src/standard__hash_collection.sep.1.c
index 4352fd7..1066d6a 100644
--- a/c_src/standard__hash_collection.sep.1.c
+++ b/c_src/standard__hash_collection.sep.1.c
@@ -2,114 +2,77 @@
 /* method hash_collection#HashCollection#index_at for (self: HashCollection[nullable Object], nullable Object): Int */
 long standard__hash_collection___standard__hash_collection__HashCollection___index_at(val* self, val* p0) {
 long var /* : Int */;
-short int var1 /* : Bool */;
-int cltype;
-int idtype;
-const struct type* type_struct;
-short int is_nullable;
-const char* var_class_name;
 val* var_k /* var k: nullable Object */;
-val* var2 /* : null */;
-short int var3 /* : Bool */;
-short int var4 /* : Bool */;
+short int var1 /* : Bool */;
+short int var2 /* : Bool */;
+long var3 /* : Int */;
+long var4 /* : Int */;
 long var5 /* : Int */;
-long var6 /* : Int */;
 long var7 /* : Int */;
-long var8 /* : Int */;
-long var10 /* : Int */;
 long var_i /* var i: Int */;
-long var11 /* : Int */;
-short int var12 /* : Bool */;
-short int var14 /* : Bool */;
-int cltype15;
-int idtype16;
-const char* var_class_name17;
-short int var18 /* : Bool */;
-long var19 /* : Int */;
-long var21 /* : Int */;
-/* Covariant cast for argument 0 (k) <p0:nullable Object> isa K */
-/* <p0:nullable Object> isa K */
-type_struct = self->type->resolution_table->types[COLOR_standard__hash_collection__HashCollection___35dK];
-cltype = type_struct->color;
-idtype = type_struct->id;
-is_nullable = type_struct->is_nullable;
-if(p0 == NULL) {
-var1 = is_nullable;
-} else {
-if(cltype >= p0->type->table_size) {
-var1 = 0;
-} else {
-var1 = p0->type->type_table[cltype] == idtype;
-}
-}
-if (unlikely(!var1)) {
-var_class_name = p0 == NULL ? "null" : p0->type->name;
-PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "K", var_class_name);
-PRINT_ERROR(" (%s:%d)\n", FILE_standard__hash_collection, 40);
-show_backtrace(1);
-}
+short int var8 /* : Bool */;
+short int var10 /* : Bool */;
+int cltype;
+int idtype;
+const char* var_class_name;
+short int var11 /* : Bool */;
+long var12 /* : Int */;
+long var14 /* : Int */;
 var_k = p0;
-var2 = NULL;
 if (var_k == NULL) {
-var3 = 1; /* is null */
+var1 = 1; /* is null */
 } else {
-var3 = 0; /* arg is null but recv is not */
+var1 = 0; /* arg is null but recv is not */
 }
 if (0) {
-var4 = ((short int (*)(val* self, val* p0))(var_k->class->vft[COLOR_standard__kernel__Object___61d_61d]))(var_k, var2) /* == on <var_k:nullable Object>*/;
-var3 = var4;
+var2 = ((short int(*)(val* self, val* p0))((((long)var_k&3)?class_info[((long)var_k&3)]:var_k->class)->vft[COLOR_standard__kernel__Object___61d_61d]))(var_k, ((val*)NULL)); /* == on <var_k:nullable Object>*/
+var1 = var2;
 }
-if (var3){
-var5 = 0;
-var = var5;
+if (var1){
+var = 0l;
 goto RET_LABEL;
 } else {
 }
-if (var_k == NULL) {
-PRINT_ERROR("Runtime error: %s", "Receiver is null");
-PRINT_ERROR(" (%s:%d)\n", FILE_standard__hash_collection, 45);
-show_backtrace(1);
-} else {
-var6 = ((long (*)(val* self))(var_k->class->vft[COLOR_standard__kernel__Object__hash]))(var_k) /* hash on <var_k:nullable Object>*/;
+{
+var3 = ((long(*)(val* self))((((long)var_k&3)?class_info[((long)var_k&3)]:var_k->class)->vft[COLOR_standard__kernel__Object__hash]))(var_k); /* hash on <var_k:nullable Object(Object)>*/
 }
-var7 = self->attrs[COLOR_standard__hash_collection__HashCollection___capacity].l; /* _capacity on <self:HashCollection[nullable Object]> */
+var4 = self->attrs[COLOR_standard__hash_collection__HashCollection___capacity].l; /* _capacity on <self:HashCollection[nullable Object]> */
 {
-{ /* Inline kernel#Int#% (var6,var7) on <var6:Int> */
-var10 = var6 % var7;
-var8 = var10;
-goto RET_LABEL9;
-RET_LABEL9:(void)0;
+{ /* Inline kernel#Int#% (var3,var4) on <var3:Int> */
+var7 = var3 % var4;
+var5 = var7;
+goto RET_LABEL6;
+RET_LABEL6:(void)0;
 }
 }
-var_i = var8;
-var11 = 0;
+var_i = var5;
 {
-{ /* Inline kernel#Int#< (var_i,var11) on <var_i:Int> */
-/* Covariant cast for argument 0 (i) <var11:Int> isa OTHER */
-/* <var11:Int> isa OTHER */
-var14 = 1; /* easy <var11:Int> isa OTHER*/
-if (unlikely(!var14)) {
-var_class_name17 = type_standard__Int.name;
-PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name17);
-PRINT_ERROR(" (%s:%d)\n", FILE_standard__kernel, 410);
-show_backtrace(1);
+{ /* Inline kernel#Int#< (var_i,0l) on <var_i:Int> */
+/* Covariant cast for argument 0 (i) <0l:Int> isa OTHER */
+/* <0l:Int> isa OTHER */
+var10 = 1; /* easy <0l:Int> isa OTHER*/
+if (unlikely(!var10)) {
+var_class_name = type_standard__Int.name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name);
+PRINT_ERROR(" (%s:%d)\n", FILE_standard__kernel, 534);
+fatal_exit(1);
 }
-var18 = var_i < var11;
-var12 = var18;
-goto RET_LABEL13;
-RET_LABEL13:(void)0;
+var11 = var_i < 0l;
+var8 = var11;
+goto RET_LABEL9;
+RET_LABEL9:(void)0;
 }
 }
-if (var12){
+if (var8){
 {
 { /* Inline kernel#Int#unary - (var_i) on <var_i:Int> */
-var21 = -var_i;
-var19 = var21;
-goto RET_LABEL20;
-RET_LABEL20:(void)0;
+var14 = -var_i;
+var12 = var14;
+goto RET_LABEL13;
+RET_LABEL13:(void)0;
 }
 }
-var_i = var19;
+var_i = var12;
 } else {
 }
 var = var_i;
@@ -120,68 +83,41 @@ return var;
 /* method hash_collection#HashCollection#node_at for (self: HashCollection[nullable Object], nullable Object): nullable HashNode[nullable Object] */
 val* standard__hash_collection___standard__hash_collection__HashCollection___node_at(val* self, val* p0) {
 val* var /* : nullable HashNode[nullable Object] */;
-short int var1 /* : Bool */;
-int cltype;
-int idtype;
-const struct type* type_struct;
-short int is_nullable;
-const char* var_class_name;
 val* var_k /* var k: nullable Object */;
-val* var2 /* : nullable Object */;
+val* var1 /* : nullable Object */;
+short int var2 /* : Bool */;
 short int var3 /* : Bool */;
-short int var4 /* : Bool */;
-short int var6 /* : Bool */;
-val* var7 /* : nullable HashNode[nullable Object] */;
-long var8 /* : Int */;
-val* var9 /* : nullable HashNode[nullable Object] */;
+short int var5 /* : Bool */;
+val* var6 /* : nullable HashNode[nullable Object] */;
+long var7 /* : Int */;
+val* var8 /* : nullable HashNode[nullable Object] */;
 val* var_res /* var res: nullable HashNode[nullable Object] */;
-/* Covariant cast for argument 0 (k) <p0:nullable Object> isa K */
-/* <p0:nullable Object> isa K */
-type_struct = self->type->resolution_table->types[COLOR_standard__hash_collection__HashCollection___35dK];
-cltype = type_struct->color;
-idtype = type_struct->id;
-is_nullable = type_struct->is_nullable;
-if(p0 == NULL) {
-var1 = is_nullable;
-} else {
-if(cltype >= p0->type->table_size) {
-var1 = 0;
-} else {
-var1 = p0->type->type_table[cltype] == idtype;
-}
-}
-if (unlikely(!var1)) {
-var_class_name = p0 == NULL ? "null" : p0->type->name;
-PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "K", var_class_name);
-PRINT_ERROR(" (%s:%d)\n", FILE_standard__hash_collection, 50);
-show_backtrace(1);
-}
 var_k = p0;
-var2 = self->attrs[COLOR_standard__hash_collection__HashCollection___last_accessed_key].val; /* _last_accessed_key on <self:HashCollection[nullable Object]> */
+var1 = self->attrs[COLOR_standard__hash_collection__HashCollection___last_accessed_key].val; /* _last_accessed_key on <self:HashCollection[nullable Object]> */
 if (var_k == NULL) {
-var3 = (var2 == NULL);
+var2 = (var1 == NULL);
 } else {
-{ /* Inline kernel#Object#is_same_instance (var_k,var2) on <var_k:nullable Object> */
-var6 = var_k == var2 || (var_k != NULL && var2 != NULL && var_k->class == var2->class && ((var_k->class->box_kind == 1 && ((struct instance_standard__Int*)var_k)->value == ((struct instance_standard__Int*)var2)->value) || (var_k->class->box_kind == 2 && ((struct instance_standard__Bool*)var_k)->value == ((struct instance_standard__Bool*)var2)->value) || (var_k->class->box_kind == 3 && ((struct instance_standard__Char*)var_k)->value == ((struct instance_standard__Char*)var2)->value) || (var_k->class->box_kind == 4 && ((struct instance_standard__Float*)var_k)->value == ((struct instance_standard__Float*)var2)->value) || (var_k->class->box_kind == 5 && ((struct instance_standard__NativeString*)var_k)->value == ((struct instance_standard__NativeString*)var2)->value) || (var_k->class->box_kind == 6 && ((struct instance_standard__Pointer*)var_k)->value == ((struct instance_standard__Pointer*)var2)->value)));
-var4 = var6;
-goto RET_LABEL5;
-RET_LABEL5:(void)0;
+{ /* Inline kernel#Object#is_same_instance (var_k,var1) on <var_k:nullable Object> */
+var5 = var_k == var1 || (var_k != NULL && var1 != NULL && (!((long)var_k&3)) && (!((long)var1&3)) && var_k->class == var1->class && ((var_k->class->box_kind == 3 && ((struct instance_standard__Byte*)var_k)->value == ((struct instance_standard__Byte*)var1)->value) || (var_k->class->box_kind == 5 && ((struct instance_standard__Float*)var_k)->value == ((struct instance_standard__Float*)var1)->value) || (var_k->class->box_kind == 6 && ((struct instance_standard__NativeString*)var_k)->value == ((struct instance_standard__NativeString*)var1)->value) || (var_k->class->box_kind == 7 && ((struct instance_standard__Pointer*)var_k)->value == ((struct instance_standard__Pointer*)var1)->value)));
+var3 = var5;
+goto RET_LABEL4;
+RET_LABEL4:(void)0;
 }
-var3 = var4;
+var2 = var3;
 }
-if (var3){
-var7 = self->attrs[COLOR_standard__hash_collection__HashCollection___last_accessed_node].val; /* _last_accessed_node on <self:HashCollection[nullable Object]> */
-var = var7;
+if (var2){
+var6 = self->attrs[COLOR_standard__hash_collection__HashCollection___last_accessed_node].val; /* _last_accessed_node on <self:HashCollection[nullable Object]> */
+var = var6;
 goto RET_LABEL;
 } else {
 }
 {
-var8 = standard__hash_collection___standard__hash_collection__HashCollection___index_at(self, var_k);
+var7 = standard__hash_collection___standard__hash_collection__HashCollection___index_at(self, var_k);
 }
 {
-var9 = standard__hash_collection___standard__hash_collection__HashCollection___node_at_idx(self, var8, var_k);
+var8 = standard__hash_collection___standard__hash_collection__HashCollection___node_at_idx(self, var7, var_k);
 }
-var_res = var9;
+var_res = var8;
 self->attrs[COLOR_standard__hash_collection__HashCollection___last_accessed_key].val = var_k; /* _last_accessed_key on <self:HashCollection[nullable Object]> */
 self->attrs[COLOR_standard__hash_collection__HashCollection___last_accessed_node].val = var_res; /* _last_accessed_node on <self:HashCollection[nullable Object]> */
 var = var_res;
@@ -192,151 +128,122 @@ return var;
 /* method hash_collection#HashCollection#node_at_idx for (self: HashCollection[nullable Object], Int, nullable Object): nullable HashNode[nullable Object] */
 val* standard__hash_collection___standard__hash_collection__HashCollection___node_at_idx(val* self, long p0, val* p1) {
 val* var /* : nullable HashNode[nullable Object] */;
-short int var1 /* : Bool */;
-int cltype;
-int idtype;
-const struct type* type_struct;
-short int is_nullable;
-const char* var_class_name;
 long var_i /* var i: Int */;
 val* var_k /* var k: nullable Object */;
-val* var2 /* : nullable NativeArray[nullable HashNode[nullable Object]] */;
-val* var3 /* : nullable Object */;
-val* var5 /* : nullable HashNode[nullable Object] */;
+val* var1 /* : nullable NativeArray[nullable HashNode[nullable Object]] */;
+val* var2 /* : nullable Object */;
+val* var4 /* : Object */;
 val* var_c /* var c: nullable HashNode[nullable Object] */;
-val* var6 /* : null */;
-short int var7 /* : Bool */;
-short int var8 /* : Bool */;
+short int var5 /* : Bool */;
+short int var6 /* : Bool */;
 val* var_other /* var other: nullable Object */;
-short int var10 /* : Bool */;
-short int var11 /* : Bool */;
-val* var12 /* : nullable Object */;
+short int var8 /* : Bool */;
+short int var9 /* : Bool */;
+val* var10 /* : nullable Object */;
 val* var_ck /* var ck: nullable Object */;
+short int var11 /* : Bool */;
+short int var12 /* : Bool */;
 short int var13 /* : Bool */;
-short int var14 /* : Bool */;
 short int var15 /* : Bool */;
-short int var17 /* : Bool */;
 short int var_ /* var : Bool */;
-short int var18 /* : Bool */;
+short int var16 /* : Bool */;
+short int var17 /* : Bool */;
+val* var18 /* : nullable HashNode[nullable Object] */;
 short int var19 /* : Bool */;
-val* var20 /* : nullable HashNode[nullable Object] */;
-short int var21 /* : Bool */;
-int cltype22;
-int idtype23;
-const struct type* type_struct24;
-const char* var_class_name25;
-/* Covariant cast for argument 1 (k) <p1:nullable Object> isa K */
-/* <p1:nullable Object> isa K */
-type_struct = self->type->resolution_table->types[COLOR_standard__hash_collection__HashCollection___35dK];
-cltype = type_struct->color;
-idtype = type_struct->id;
-is_nullable = type_struct->is_nullable;
-if(p1 == NULL) {
-var1 = is_nullable;
-} else {
-if(cltype >= p1->type->table_size) {
-var1 = 0;
-} else {
-var1 = p1->type->type_table[cltype] == idtype;
-}
-}
-if (unlikely(!var1)) {
-var_class_name = p1 == NULL ? "null" : p1->type->name;
-PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "K", var_class_name);
-PRINT_ERROR(" (%s:%d)\n", FILE_standard__hash_collection, 62);
-show_backtrace(1);
-}
+int cltype;
+int idtype;
+const struct type* type_struct;
+const char* var_class_name;
 var_i = p0;
 var_k = p1;
-var2 = self->attrs[COLOR_standard__hash_collection__HashCollection___array].val; /* _array on <self:HashCollection[nullable Object]> */
-if (var2 == NULL) {
+var1 = self->attrs[COLOR_standard__hash_collection__HashCollection___array].val; /* _array on <self:HashCollection[nullable Object]> */
+if (var1 == NULL) {
 PRINT_ERROR("Runtime error: %s", "Receiver is null");
 PRINT_ERROR(" (%s:%d)\n", FILE_standard__hash_collection, 65);
-show_backtrace(1);
+fatal_exit(1);
 } else {
-{ /* Inline array#NativeArray#[] (var2,var_i) on <var2:nullable NativeArray[nullable HashNode[nullable Object]]> */
-var5 = ((struct instance_standard__NativeArray*)var2)->values[var_i];
-var3 = var5;
-goto RET_LABEL4;
-RET_LABEL4:(void)0;
+{ /* Inline array#NativeArray#[] (var1,var_i) on <var1:nullable NativeArray[nullable HashNode[nullable Object]]> */
+var4 = ((struct instance_standard__NativeArray*)var1)->values[var_i];
+var2 = var4;
+goto RET_LABEL3;
+RET_LABEL3:(void)0;
 }
 }
-var_c = var3;
+var_c = var2;
 for(;;) {
-var6 = NULL;
 if (var_c == NULL) {
-var7 = 0; /* is null */
+var5 = 0; /* is null */
 } else {
-var7 = 1; /* arg is null and recv is not */
+var5 = 1; /* arg is null and recv is not */
 }
 if (0) {
-{ /* Inline kernel#Object#!= (var_c,var6) on <var_c:nullable HashNode[nullable Object]> */
-var_other = var6;
+{ /* Inline kernel#Object#!= (var_c,((val*)NULL)) on <var_c:nullable HashNode[nullable Object]> */
+var_other = ((val*)NULL);
 {
-var10 = ((short int (*)(val* self, val* p0))(var_c->class->vft[COLOR_standard__kernel__Object___61d_61d]))(var_c, var_other) /* == on <var_c:nullable HashNode[nullable Object](HashNode[nullable Object])>*/;
+var8 = ((short int(*)(val* self, val* p0))(var_c->class->vft[COLOR_standard__kernel__Object___61d_61d]))(var_c, var_other); /* == on <var_c:nullable HashNode[nullable Object](HashNode[nullable Object])>*/
 }
-var11 = !var10;
-var8 = var11;
-goto RET_LABEL9;
-RET_LABEL9:(void)0;
+var9 = !var8;
+var6 = var9;
+goto RET_LABEL7;
+RET_LABEL7:(void)0;
 }
-var7 = var8;
+var5 = var6;
 }
-if (var7){
-var12 = var_c->attrs[COLOR_standard__hash_collection__HashNode___key].val; /* _key on <var_c:nullable HashNode[nullable Object](HashNode[nullable Object])> */
-var_ck = var12;
+if (var5){
+var10 = var_c->attrs[COLOR_standard__hash_collection__HashNode___key].val; /* _key on <var_c:nullable HashNode[nullable Object](HashNode[nullable Object])> */
+var_ck = var10;
 if (var_ck == NULL) {
-var14 = (var_k == NULL);
+var12 = (var_k == NULL);
 } else {
 { /* Inline kernel#Object#is_same_instance (var_ck,var_k) on <var_ck:nullable Object> */
-var17 = var_ck == var_k || (var_ck != NULL && var_k != NULL && var_ck->class == var_k->class && ((var_ck->class->box_kind == 1 && ((struct instance_standard__Int*)var_ck)->value == ((struct instance_standard__Int*)var_k)->value) || (var_ck->class->box_kind == 2 && ((struct instance_standard__Bool*)var_ck)->value == ((struct instance_standard__Bool*)var_k)->value) || (var_ck->class->box_kind == 3 && ((struct instance_standard__Char*)var_ck)->value == ((struct instance_standard__Char*)var_k)->value) || (var_ck->class->box_kind == 4 && ((struct instance_standard__Float*)var_ck)->value == ((struct instance_standard__Float*)var_k)->value) || (var_ck->class->box_kind == 5 && ((struct instance_standard__NativeString*)var_ck)->value == ((struct instance_standard__NativeString*)var_k)->value) || (var_ck->class->box_kind == 6 && ((struct instance_standard__Pointer*)var_ck)->value == ((struct instance_standard__Pointer*)var_k)->value)));
-var15 = var17;
-goto RET_LABEL16;
-RET_LABEL16:(void)0;
+var15 = var_ck == var_k || (var_ck != NULL && var_k != NULL && (!((long)var_ck&3)) && (!((long)var_k&3)) && var_ck->class == var_k->class && ((var_ck->class->box_kind == 3 && ((struct instance_standard__Byte*)var_ck)->value == ((struct instance_standard__Byte*)var_k)->value) || (var_ck->class->box_kind == 5 && ((struct instance_standard__Float*)var_ck)->value == ((struct instance_standard__Float*)var_k)->value) || (var_ck->class->box_kind == 6 && ((struct instance_standard__NativeString*)var_ck)->value == ((struct instance_standard__NativeString*)var_k)->value) || (var_ck->class->box_kind == 7 && ((struct instance_standard__Pointer*)var_ck)->value == ((struct instance_standard__Pointer*)var_k)->value)));
+var13 = var15;
+goto RET_LABEL14;
+RET_LABEL14:(void)0;
 }
-var14 = var15;
+var12 = var13;
 }
-var_ = var14;
-if (var14){
-var13 = var_;
+var_ = var12;
+if (var12){
+var11 = var_;
 } else {
 if (var_ck == NULL) {
-var18 = (var_k == NULL);
+var16 = (var_k == NULL);
 } else {
-var19 = ((short int (*)(val* self, val* p0))(var_ck->class->vft[COLOR_standard__kernel__Object___61d_61d]))(var_ck, var_k) /* == on <var_ck:nullable Object>*/;
-var18 = var19;
+var17 = ((short int(*)(val* self, val* p0))((((long)var_ck&3)?class_info[((long)var_ck&3)]:var_ck->class)->vft[COLOR_standard__kernel__Object___61d_61d]))(var_ck, var_k); /* == on <var_ck:nullable Object>*/
+var16 = var17;
 }
-var13 = var18;
+var11 = var16;
 }
-if (var13){
+if (var11){
 goto BREAK_label;
 } else {
 }
-var20 = var_c->attrs[COLOR_standard__hash_collection__HashNode___next_in_bucklet].val; /* _next_in_bucklet on <var_c:nullable HashNode[nullable Object](HashNode[nullable Object])> */
-var_c = var20;
+var18 = var_c->attrs[COLOR_standard__hash_collection__HashNode___next_in_bucklet].val; /* _next_in_bucklet on <var_c:nullable HashNode[nullable Object](HashNode[nullable Object])> */
+var_c = var18;
 } else {
 goto BREAK_label;
 }
 }
 BREAK_label: (void)0;
 /* <var_c:nullable HashNode[nullable Object]> isa nullable N */
-type_struct24 = self->type->resolution_table->types[COLOR_nullable__standard__hash_collection__HashCollection__N];
-cltype22 = type_struct24->color;
-idtype23 = type_struct24->id;
+type_struct = self->type->resolution_table->types[COLOR_nullable__standard__hash_collection__HashCollection__N];
+cltype = type_struct->color;
+idtype = type_struct->id;
 if(var_c == NULL) {
-var21 = 1;
+var19 = 1;
 } else {
-if(cltype22 >= var_c->type->table_size) {
-var21 = 0;
+if(cltype >= var_c->type->table_size) {
+var19 = 0;
 } else {
-var21 = var_c->type->type_table[cltype22] == idtype23;
+var19 = var_c->type->type_table[cltype] == idtype;
 }
 }
-if (unlikely(!var21)) {
-var_class_name25 = var_c == NULL ? "null" : var_c->type->name;
-PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "nullable N", var_class_name25);
+if (unlikely(!var19)) {
+var_class_name = var_c == NULL ? "null" : var_c->type->name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "nullable N", var_class_name);
 PRINT_ERROR(" (%s:%d)\n", FILE_standard__hash_collection, 73);
-show_backtrace(1);
+fatal_exit(1);
 }
 var = var_c;
 goto RET_LABEL;
@@ -353,90 +260,80 @@ const char* var_class_name;
 long var_index /* var index: Int */;
 val* var_node /* var node: HashNode[nullable Object] */;
 val* var1 /* : nullable HashNode[nullable Object] */;
-val* var2 /* : null */;
+short int var2 /* : Bool */;
 short int var3 /* : Bool */;
-short int var4 /* : Bool */;
 val* var_other /* var other: nullable Object */;
-short int var6 /* : Bool */;
-short int var8 /* : Bool */;
+short int var5 /* : Bool */;
+short int var7 /* : Bool */;
+val* var8 /* : nullable HashNode[nullable Object] */;
 val* var9 /* : nullable HashNode[nullable Object] */;
-val* var10 /* : nullable HashNode[nullable Object] */;
-val* var11 /* : null */;
-val* var12 /* : nullable NativeArray[nullable HashNode[nullable Object]] */;
-val* var13 /* : nullable Object */;
-val* var15 /* : nullable HashNode[nullable Object] */;
+val* var10 /* : nullable NativeArray[nullable HashNode[nullable Object]] */;
+val* var11 /* : nullable Object */;
+val* var13 /* : Object */;
 val* var_next /* var next: nullable HashNode[nullable Object] */;
-val* var16 /* : nullable NativeArray[nullable HashNode[nullable Object]] */;
-short int var18 /* : Bool */;
-int cltype19;
-int idtype20;
-const struct type* type_struct21;
-const char* var_class_name22;
-val* var23 /* : null */;
-short int var24 /* : Bool */;
+val* var14 /* : nullable NativeArray[nullable HashNode[nullable Object]] */;
+short int var16 /* : Bool */;
+int cltype17;
+int idtype18;
+const struct type* type_struct19;
+const char* var_class_name20;
+short int var21 /* : Bool */;
+short int var22 /* : Bool */;
+val* var_other24 /* var other: nullable Object */;
 short int var25 /* : Bool */;
-val* var_other27 /* var other: nullable Object */;
-short int var28 /* : Bool */;
-short int var29 /* : Bool */;
-val* var30 /* : nullable Object */;
-long var31 /* : Int */;
+short int var26 /* : Bool */;
+val* var27 /* : nullable Object */;
+long var28 /* : Int */;
 long var_l /* var l: Int */;
-long var32 /* : Int */;
-long var33 /* : Int */;
-short int var35 /* : Bool */;
-int cltype36;
-int idtype37;
-const char* var_class_name38;
-long var39 /* : Int */;
-long var40 /* : Int */;
-long var41 /* : Int */;
-short int var43 /* : Bool */;
-int cltype44;
-int idtype45;
-const char* var_class_name46;
-long var47 /* : Int */;
-long var48 /* : Int */;
+long var29 /* : Int */;
+short int var31 /* : Bool */;
+int cltype32;
+int idtype33;
+const char* var_class_name34;
+long var35 /* : Int */;
+long var36 /* : Int */;
+short int var38 /* : Bool */;
+int cltype39;
+int idtype40;
+const char* var_class_name41;
+long var42 /* : Int */;
+long var43 /* : Int */;
+short int var45 /* : Bool */;
+int cltype46;
+int idtype47;
+const char* var_class_name48;
 long var49 /* : Int */;
-short int var51 /* : Bool */;
-int cltype52;
-int idtype53;
-const char* var_class_name54;
-long var55 /* : Int */;
+long var50 /* : Int */;
+short int var52 /* : Bool */;
+int cltype53;
+int idtype54;
+const char* var_class_name55;
 long var56 /* : Int */;
 long var57 /* : Int */;
-short int var59 /* : Bool */;
-int cltype60;
-int idtype61;
-const char* var_class_name62;
-long var63 /* : Int */;
-long var64 /* : Int */;
-short int var65 /* : Bool */;
+short int var58 /* : Bool */;
+short int var60 /* : Bool */;
+int cltype61;
+int idtype62;
+const char* var_class_name63;
+short int var64 /* : Bool */;
+long var65 /* : Int */;
 short int var67 /* : Bool */;
 int cltype68;
 int idtype69;
 const char* var_class_name70;
-short int var71 /* : Bool */;
+long var71 /* : Int */;
 long var72 /* : Int */;
-long var73 /* : Int */;
-short int var75 /* : Bool */;
-int cltype76;
-int idtype77;
-const char* var_class_name78;
+short int var74 /* : Bool */;
+int cltype75;
+int idtype76;
+const char* var_class_name77;
+long var78 /* : Int */;
 long var79 /* : Int */;
-long var80 /* : Int */;
-long var81 /* : Int */;
-short int var83 /* : Bool */;
-int cltype84;
-int idtype85;
-const char* var_class_name86;
-long var87 /* : Int */;
-long var88 /* : Int */;
-long var89 /* : Int */;
-short int var91 /* : Bool */;
-int cltype92;
-int idtype93;
-const char* var_class_name94;
-long var95 /* : Int */;
+short int var81 /* : Bool */;
+int cltype82;
+int idtype83;
+const char* var_class_name84;
+long var85 /* : Int */;
 /* Covariant cast for argument 1 (node) <p1:HashNode[nullable Object]> isa N */
 /* <p1:HashNode[nullable Object]> isa N */
 type_struct = self->type->resolution_table->types[COLOR_standard__hash_collection__HashCollection__N];
@@ -451,269 +348,259 @@ if (unlikely(!var)) {
 var_class_name = p1 == NULL ? "null" : p1->type->name;
 PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "N", var_class_name);
 PRINT_ERROR(" (%s:%d)\n", FILE_standard__hash_collection, 76);
-show_backtrace(1);
+fatal_exit(1);
 }
 var_index = p0;
 var_node = p1;
 var1 = self->attrs[COLOR_standard__hash_collection__HashCollection___first_item].val; /* _first_item on <self:HashCollection[nullable Object]> */
-var2 = NULL;
 if (var1 == NULL) {
-var3 = 1; /* is null */
+var2 = 1; /* is null */
 } else {
-var3 = 0; /* arg is null but recv is not */
+var2 = 0; /* arg is null but recv is not */
 }
 if (0) {
-{ /* Inline kernel#Object#== (var1,var2) on <var1:nullable HashNode[nullable Object]> */
-var_other = var2;
+{ /* Inline kernel#Object#== (var1,((val*)NULL)) on <var1:nullable HashNode[nullable Object]> */
+var_other = ((val*)NULL);
 {
 { /* Inline kernel#Object#is_same_instance (var1,var_other) on <var1:nullable HashNode[nullable Object](HashNode[nullable Object])> */
-var8 = var1 == var_other;
-var6 = var8;
-goto RET_LABEL7;
-RET_LABEL7:(void)0;
+var7 = var1 == var_other;
+var5 = var7;
+goto RET_LABEL6;
+RET_LABEL6:(void)0;
 }
 }
-var4 = var6;
-goto RET_LABEL5;
-RET_LABEL5:(void)0;
+var3 = var5;
+goto RET_LABEL4;
+RET_LABEL4:(void)0;
 }
-var3 = var4;
+var2 = var3;
 }
-if (var3){
+if (var2){
 self->attrs[COLOR_standard__hash_collection__HashCollection___first_item].val = var_node; /* _first_item on <self:HashCollection[nullable Object]> */
 } else {
-var9 = self->attrs[COLOR_standard__hash_collection__HashCollection___last_item].val; /* _last_item on <self:HashCollection[nullable Object]> */
-if (unlikely(var9 == NULL)) {
+var8 = self->attrs[COLOR_standard__hash_collection__HashCollection___last_item].val; /* _last_item on <self:HashCollection[nullable Object]> */
+if (unlikely(var8 == NULL)) {
 PRINT_ERROR("Runtime error: %s", "Receiver is null");
 PRINT_ERROR(" (%s:%d)\n", FILE_standard__hash_collection, 83);
-show_backtrace(1);
+fatal_exit(1);
 }
-var9->attrs[COLOR_standard__hash_collection__HashNode___next_item].val = var_node; /* _next_item on <var9:nullable HashNode[nullable Object]> */
+var8->attrs[COLOR_standard__hash_collection__HashNode___next_item].val = var_node; /* _next_item on <var8:nullable HashNode[nullable Object]> */
 }
-var10 = self->attrs[COLOR_standard__hash_collection__HashCollection___last_item].val; /* _last_item on <self:HashCollection[nullable Object]> */
-var_node->attrs[COLOR_standard__hash_collection__HashNode___prev_item].val = var10; /* _prev_item on <var_node:HashNode[nullable Object]> */
-var11 = NULL;
-var_node->attrs[COLOR_standard__hash_collection__HashNode___next_item].val = var11; /* _next_item on <var_node:HashNode[nullable Object]> */
+var9 = self->attrs[COLOR_standard__hash_collection__HashCollection___last_item].val; /* _last_item on <self:HashCollection[nullable Object]> */
+var_node->attrs[COLOR_standard__hash_collection__HashNode___prev_item].val = var9; /* _prev_item on <var_node:HashNode[nullable Object]> */
+var_node->attrs[COLOR_standard__hash_collection__HashNode___next_item].val = ((val*)NULL); /* _next_item on <var_node:HashNode[nullable Object]> */
 self->attrs[COLOR_standard__hash_collection__HashCollection___last_item].val = var_node; /* _last_item on <self:HashCollection[nullable Object]> */
-var12 = self->attrs[COLOR_standard__hash_collection__HashCollection___array].val; /* _array on <self:HashCollection[nullable Object]> */
-if (var12 == NULL) {
+var10 = self->attrs[COLOR_standard__hash_collection__HashCollection___array].val; /* _array on <self:HashCollection[nullable Object]> */
+if (var10 == NULL) {
 PRINT_ERROR("Runtime error: %s", "Receiver is null");
 PRINT_ERROR(" (%s:%d)\n", FILE_standard__hash_collection, 90);
-show_backtrace(1);
+fatal_exit(1);
 } else {
-{ /* Inline array#NativeArray#[] (var12,var_index) on <var12:nullable NativeArray[nullable HashNode[nullable Object]]> */
-var15 = ((struct instance_standard__NativeArray*)var12)->values[var_index];
-var13 = var15;
-goto RET_LABEL14;
-RET_LABEL14:(void)0;
+{ /* Inline array#NativeArray#[] (var10,var_index) on <var10:nullable NativeArray[nullable HashNode[nullable Object]]> */
+var13 = ((struct instance_standard__NativeArray*)var10)->values[var_index];
+var11 = var13;
+goto RET_LABEL12;
+RET_LABEL12:(void)0;
 }
 }
-var_next = var13;
-var16 = self->attrs[COLOR_standard__hash_collection__HashCollection___array].val; /* _array on <self:HashCollection[nullable Object]> */
-if (var16 == NULL) {
+var_next = var11;
+var14 = self->attrs[COLOR_standard__hash_collection__HashCollection___array].val; /* _array on <self:HashCollection[nullable Object]> */
+if (var14 == NULL) {
 PRINT_ERROR("Runtime error: %s", "Receiver is null");
 PRINT_ERROR(" (%s:%d)\n", FILE_standard__hash_collection, 91);
-show_backtrace(1);
+fatal_exit(1);
 } else {
-{ /* Inline array#NativeArray#[]= (var16,var_index,var_node) on <var16:nullable NativeArray[nullable HashNode[nullable Object]]> */
+{ /* Inline array#NativeArray#[]= (var14,var_index,var_node) on <var14:nullable NativeArray[nullable HashNode[nullable Object]]> */
 /* Covariant cast for argument 1 (item) <var_node:HashNode[nullable Object]> isa E */
 /* <var_node:HashNode[nullable Object]> isa E */
-type_struct21 = var16->type->resolution_table->types[COLOR_standard__NativeArray___35dE];
-cltype19 = type_struct21->color;
-idtype20 = type_struct21->id;
-if(cltype19 >= var_node->type->table_size) {
-var18 = 0;
+type_struct19 = var14->type->resolution_table->types[COLOR_standard__NativeArray___35dE];
+cltype17 = type_struct19->color;
+idtype18 = type_struct19->id;
+if(cltype17 >= var_node->type->table_size) {
+var16 = 0;
 } else {
-var18 = var_node->type->type_table[cltype19] == idtype20;
+var16 = var_node->type->type_table[cltype17] == idtype18;
 }
-if (unlikely(!var18)) {
-var_class_name22 = var_node == NULL ? "null" : var_node->type->name;
-PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "E", var_class_name22);
-PRINT_ERROR(" (%s:%d)\n", FILE_standard__array, 808);
-show_backtrace(1);
+if (unlikely(!var16)) {
+var_class_name20 = var_node == NULL ? "null" : var_node->type->name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "E", var_class_name20);
+PRINT_ERROR(" (%s:%d)\n", FILE_standard__array, 957);
+fatal_exit(1);
 }
-((struct instance_standard__NativeArray*)var16)->values[var_index]=var_node;
-RET_LABEL17:(void)0;
+((struct instance_standard__NativeArray*)var14)->values[var_index]=var_node;
+RET_LABEL15:(void)0;
 }
 }
 var_node->attrs[COLOR_standard__hash_collection__HashNode___next_in_bucklet].val = var_next; /* _next_in_bucklet on <var_node:HashNode[nullable Object]> */
-var23 = NULL;
 if (var_next == NULL) {
-var24 = 0; /* is null */
+var21 = 0; /* is null */
 } else {
-var24 = 1; /* arg is null and recv is not */
+var21 = 1; /* arg is null and recv is not */
 }
 if (0) {
-{ /* Inline kernel#Object#!= (var_next,var23) on <var_next:nullable HashNode[nullable Object]> */
-var_other27 = var23;
+{ /* Inline kernel#Object#!= (var_next,((val*)NULL)) on <var_next:nullable HashNode[nullable Object]> */
+var_other24 = ((val*)NULL);
 {
-var28 = ((short int (*)(val* self, val* p0))(var_next->class->vft[COLOR_standard__kernel__Object___61d_61d]))(var_next, var_other27) /* == on <var_next:nullable HashNode[nullable Object](HashNode[nullable Object])>*/;
+var25 = ((short int(*)(val* self, val* p0))(var_next->class->vft[COLOR_standard__kernel__Object___61d_61d]))(var_next, var_other24); /* == on <var_next:nullable HashNode[nullable Object](HashNode[nullable Object])>*/
 }
-var29 = !var28;
-var25 = var29;
-goto RET_LABEL26;
-RET_LABEL26:(void)0;
+var26 = !var25;
+var22 = var26;
+goto RET_LABEL23;
+RET_LABEL23:(void)0;
 }
-var24 = var25;
+var21 = var22;
 }
-if (var24){
+if (var21){
 var_next->attrs[COLOR_standard__hash_collection__HashNode___prev_in_bucklet].val = var_node; /* _prev_in_bucklet on <var_next:nullable HashNode[nullable Object](HashNode[nullable Object])> */
 } else {
 }
-var30 = var_node->attrs[COLOR_standard__hash_collection__HashNode___key].val; /* _key on <var_node:HashNode[nullable Object]> */
-self->attrs[COLOR_standard__hash_collection__HashCollection___last_accessed_key].val = var30; /* _last_accessed_key on <self:HashCollection[nullable Object]> */
+var27 = var_node->attrs[COLOR_standard__hash_collection__HashNode___key].val; /* _key on <var_node:HashNode[nullable Object]> */
+self->attrs[COLOR_standard__hash_collection__HashCollection___last_accessed_key].val = var27; /* _last_accessed_key on <self:HashCollection[nullable Object]> */
 self->attrs[COLOR_standard__hash_collection__HashCollection___last_accessed_node].val = var_node; /* _last_accessed_node on <self:HashCollection[nullable Object]> */
-var31 = self->attrs[COLOR_standard__hash_collection__HashCollection___the_length].l; /* _the_length on <self:HashCollection[nullable Object]> */
-var_l = var31;
-var32 = 1;
-{
-{ /* Inline kernel#Int#+ (var_l,var32) on <var_l:Int> */
-/* Covariant cast for argument 0 (i) <var32:Int> isa OTHER */
-/* <var32:Int> isa OTHER */
-var35 = 1; /* easy <var32:Int> isa OTHER*/
-if (unlikely(!var35)) {
-var_class_name38 = type_standard__Int.name;
-PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name38);
-PRINT_ERROR(" (%s:%d)\n", FILE_standard__kernel, 413);
-show_backtrace(1);
-}
-var39 = var_l + var32;
-var33 = var39;
-goto RET_LABEL34;
-RET_LABEL34:(void)0;
-}
-}
-self->attrs[COLOR_standard__hash_collection__HashCollection___the_length].l = var33; /* _the_length on <self:HashCollection[nullable Object]> */
-var40 = 5;
-{
-{ /* Inline kernel#Int#+ (var_l,var40) on <var_l:Int> */
-/* Covariant cast for argument 0 (i) <var40:Int> isa OTHER */
-/* <var40:Int> isa OTHER */
-var43 = 1; /* easy <var40:Int> isa OTHER*/
-if (unlikely(!var43)) {
-var_class_name46 = type_standard__Int.name;
-PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name46);
-PRINT_ERROR(" (%s:%d)\n", FILE_standard__kernel, 413);
-show_backtrace(1);
-}
-var47 = var_l + var40;
-var41 = var47;
-goto RET_LABEL42;
-RET_LABEL42:(void)0;
-}
-}
-var48 = 2;
-{
-{ /* Inline kernel#Int#* (var41,var48) on <var41:Int> */
-/* Covariant cast for argument 0 (i) <var48:Int> isa OTHER */
-/* <var48:Int> isa OTHER */
-var51 = 1; /* easy <var48:Int> isa OTHER*/
-if (unlikely(!var51)) {
-var_class_name54 = type_standard__Int.name;
-PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name54);
-PRINT_ERROR(" (%s:%d)\n", FILE_standard__kernel, 417);
-show_backtrace(1);
-}
-var55 = var41 * var48;
-var49 = var55;
-goto RET_LABEL50;
-RET_LABEL50:(void)0;
-}
-}
-var56 = 1;
+var28 = self->attrs[COLOR_standard__hash_collection__HashCollection___the_length].l; /* _the_length on <self:HashCollection[nullable Object]> */
+var_l = var28;
 {
-{ /* Inline kernel#Int#+ (var49,var56) on <var49:Int> */
-/* Covariant cast for argument 0 (i) <var56:Int> isa OTHER */
-/* <var56:Int> isa OTHER */
-var59 = 1; /* easy <var56:Int> isa OTHER*/
-if (unlikely(!var59)) {
-var_class_name62 = type_standard__Int.name;
-PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name62);
-PRINT_ERROR(" (%s:%d)\n", FILE_standard__kernel, 413);
-show_backtrace(1);
+{ /* Inline kernel#Int#+ (var_l,1l) on <var_l:Int> */
+/* Covariant cast for argument 0 (i) <1l:Int> isa OTHER */
+/* <1l:Int> isa OTHER */
+var31 = 1; /* easy <1l:Int> isa OTHER*/
+if (unlikely(!var31)) {
+var_class_name34 = type_standard__Int.name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name34);
+PRINT_ERROR(" (%s:%d)\n", FILE_standard__kernel, 537);
+fatal_exit(1);
 }
-var63 = var49 + var56;
-var57 = var63;
-goto RET_LABEL58;
-RET_LABEL58:(void)0;
+var35 = var_l + 1l;
+var29 = var35;
+goto RET_LABEL30;
+RET_LABEL30:(void)0;
 }
 }
-var_l = var57;
-var64 = self->attrs[COLOR_standard__hash_collection__HashCollection___capacity].l; /* _capacity on <self:HashCollection[nullable Object]> */
+self->attrs[COLOR_standard__hash_collection__HashCollection___the_length].l = var29; /* _the_length on <self:HashCollection[nullable Object]> */
 {
-{ /* Inline kernel#Int#>= (var_l,var64) on <var_l:Int> */
-/* Covariant cast for argument 0 (i) <var64:Int> isa OTHER */
-/* <var64:Int> isa OTHER */
-var67 = 1; /* easy <var64:Int> isa OTHER*/
+{ /* Inline kernel#Int#+ (var_l,5l) on <var_l:Int> */
+/* Covariant cast for argument 0 (i) <5l:Int> isa OTHER */
+/* <5l:Int> isa OTHER */
+var38 = 1; /* easy <5l:Int> isa OTHER*/
+if (unlikely(!var38)) {
+var_class_name41 = type_standard__Int.name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name41);
+PRINT_ERROR(" (%s:%d)\n", FILE_standard__kernel, 537);
+fatal_exit(1);
+}
+var42 = var_l + 5l;
+var36 = var42;
+goto RET_LABEL37;
+RET_LABEL37:(void)0;
+}
+}
+{
+{ /* Inline kernel#Int#* (var36,2l) on <var36:Int> */
+/* Covariant cast for argument 0 (i) <2l:Int> isa OTHER */
+/* <2l:Int> isa OTHER */
+var45 = 1; /* easy <2l:Int> isa OTHER*/
+if (unlikely(!var45)) {
+var_class_name48 = type_standard__Int.name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name48);
+PRINT_ERROR(" (%s:%d)\n", FILE_standard__kernel, 541);
+fatal_exit(1);
+}
+var49 = var36 * 2l;
+var43 = var49;
+goto RET_LABEL44;
+RET_LABEL44:(void)0;
+}
+}
+{
+{ /* Inline kernel#Int#+ (var43,1l) on <var43:Int> */
+/* Covariant cast for argument 0 (i) <1l:Int> isa OTHER */
+/* <1l:Int> isa OTHER */
+var52 = 1; /* easy <1l:Int> isa OTHER*/
+if (unlikely(!var52)) {
+var_class_name55 = type_standard__Int.name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name55);
+PRINT_ERROR(" (%s:%d)\n", FILE_standard__kernel, 537);
+fatal_exit(1);
+}
+var56 = var43 + 1l;
+var50 = var56;
+goto RET_LABEL51;
+RET_LABEL51:(void)0;
+}
+}
+var_l = var50;
+var57 = self->attrs[COLOR_standard__hash_collection__HashCollection___capacity].l; /* _capacity on <self:HashCollection[nullable Object]> */
+{
+{ /* Inline kernel#Int#>= (var_l,var57) on <var_l:Int> */
+/* Covariant cast for argument 0 (i) <var57:Int> isa OTHER */
+/* <var57:Int> isa OTHER */
+var60 = 1; /* easy <var57:Int> isa OTHER*/
+if (unlikely(!var60)) {
+var_class_name63 = type_standard__Int.name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name63);
+PRINT_ERROR(" (%s:%d)\n", FILE_standard__kernel, 535);
+fatal_exit(1);
+}
+var64 = var_l >= var57;
+var58 = var64;
+goto RET_LABEL59;
+RET_LABEL59:(void)0;
+}
+}
+if (var58){
+{
+{ /* Inline kernel#Int#* (var_l,3l) on <var_l:Int> */
+/* Covariant cast for argument 0 (i) <3l:Int> isa OTHER */
+/* <3l:Int> isa OTHER */
+var67 = 1; /* easy <3l:Int> isa OTHER*/
 if (unlikely(!var67)) {
 var_class_name70 = type_standard__Int.name;
 PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name70);
-PRINT_ERROR(" (%s:%d)\n", FILE_standard__kernel, 411);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_standard__kernel, 541);
+fatal_exit(1);
 }
-var71 = var_l >= var64;
+var71 = var_l * 3l;
 var65 = var71;
 goto RET_LABEL66;
 RET_LABEL66:(void)0;
 }
 }
-if (var65){
-var72 = 3;
-{
-{ /* Inline kernel#Int#* (var_l,var72) on <var_l:Int> */
-/* Covariant cast for argument 0 (i) <var72:Int> isa OTHER */
-/* <var72:Int> isa OTHER */
-var75 = 1; /* easy <var72:Int> isa OTHER*/
-if (unlikely(!var75)) {
-var_class_name78 = type_standard__Int.name;
-PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name78);
-PRINT_ERROR(" (%s:%d)\n", FILE_standard__kernel, 417);
-show_backtrace(1);
-}
-var79 = var_l * var72;
-var73 = var79;
-goto RET_LABEL74;
-RET_LABEL74:(void)0;
-}
-}
-var80 = 2;
 {
-{ /* Inline kernel#Int#/ (var73,var80) on <var73:Int> */
-/* Covariant cast for argument 0 (i) <var80:Int> isa OTHER */
-/* <var80:Int> isa OTHER */
-var83 = 1; /* easy <var80:Int> isa OTHER*/
-if (unlikely(!var83)) {
-var_class_name86 = type_standard__Int.name;
-PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name86);
-PRINT_ERROR(" (%s:%d)\n", FILE_standard__kernel, 418);
-show_backtrace(1);
+{ /* Inline kernel#Int#/ (var65,2l) on <var65:Int> */
+/* Covariant cast for argument 0 (i) <2l:Int> isa OTHER */
+/* <2l:Int> isa OTHER */
+var74 = 1; /* easy <2l:Int> isa OTHER*/
+if (unlikely(!var74)) {
+var_class_name77 = type_standard__Int.name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name77);
+PRINT_ERROR(" (%s:%d)\n", FILE_standard__kernel, 542);
+fatal_exit(1);
 }
-var87 = var73 / var80;
-var81 = var87;
-goto RET_LABEL82;
-RET_LABEL82:(void)0;
+var78 = var65 / 2l;
+var72 = var78;
+goto RET_LABEL73;
+RET_LABEL73:(void)0;
 }
 }
-var88 = 1;
 {
-{ /* Inline kernel#Int#+ (var81,var88) on <var81:Int> */
-/* Covariant cast for argument 0 (i) <var88:Int> isa OTHER */
-/* <var88:Int> isa OTHER */
-var91 = 1; /* easy <var88:Int> isa OTHER*/
-if (unlikely(!var91)) {
-var_class_name94 = type_standard__Int.name;
-PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name94);
-PRINT_ERROR(" (%s:%d)\n", FILE_standard__kernel, 413);
-show_backtrace(1);
+{ /* Inline kernel#Int#+ (var72,1l) on <var72:Int> */
+/* Covariant cast for argument 0 (i) <1l:Int> isa OTHER */
+/* <1l:Int> isa OTHER */
+var81 = 1; /* easy <1l:Int> isa OTHER*/
+if (unlikely(!var81)) {
+var_class_name84 = type_standard__Int.name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name84);
+PRINT_ERROR(" (%s:%d)\n", FILE_standard__kernel, 537);
+fatal_exit(1);
 }
-var95 = var81 + var88;
-var89 = var95;
-goto RET_LABEL90;
-RET_LABEL90:(void)0;
+var85 = var72 + 1l;
+var79 = var85;
+goto RET_LABEL80;
+RET_LABEL80:(void)0;
 }
 }
 {
-standard__hash_collection___standard__hash_collection__HashCollection___enlarge(self, var89); /* Direct call hash_collection#HashCollection#enlarge on <self:HashCollection[nullable Object]>*/
+standard__hash_collection___standard__hash_collection__HashCollection___enlarge(self, var79); /* Direct call hash_collection#HashCollection#enlarge on <self:HashCollection[nullable Object]>*/
 }
 } else {
 }
@@ -721,473 +608,416 @@ RET_LABEL:;
 }
 /* method hash_collection#HashCollection#remove_node for (self: HashCollection[nullable Object], nullable Object) */
 void standard__hash_collection___standard__hash_collection__HashCollection___remove_node(val* self, val* p0) {
-short int var /* : Bool */;
-int cltype;
-int idtype;
-const struct type* type_struct;
-short int is_nullable;
-const char* var_class_name;
 val* var_k /* var k: nullable Object */;
-long var1 /* : Int */;
+long var /* : Int */;
 long var_i /* var i: Int */;
-val* var2 /* : nullable HashNode[nullable Object] */;
+val* var1 /* : nullable HashNode[nullable Object] */;
 val* var_node /* var node: nullable HashNode[nullable Object] */;
-val* var3 /* : null */;
-short int var4 /* : Bool */;
-short int var5 /* : Bool */;
+short int var2 /* : Bool */;
+short int var3 /* : Bool */;
 val* var_other /* var other: nullable Object */;
+short int var5 /* : Bool */;
 short int var7 /* : Bool */;
-short int var9 /* : Bool */;
-val* var10 /* : nullable HashNode[nullable Object] */;
+val* var8 /* : nullable HashNode[nullable Object] */;
 val* var_prev /* var prev: nullable HashNode[nullable Object] */;
-val* var11 /* : nullable HashNode[nullable Object] */;
+val* var9 /* : nullable HashNode[nullable Object] */;
 val* var_next /* var next: nullable HashNode[nullable Object] */;
-val* var12 /* : null */;
-short int var13 /* : Bool */;
+short int var10 /* : Bool */;
+short int var11 /* : Bool */;
+val* var_other13 /* var other: nullable Object */;
 short int var14 /* : Bool */;
-val* var_other16 /* var other: nullable Object */;
+short int var15 /* : Bool */;
+short int var16 /* : Bool */;
+int cltype;
+int idtype;
+const struct type* type_struct;
+const char* var_class_name;
 short int var17 /* : Bool */;
 short int var18 /* : Bool */;
-short int var19 /* : Bool */;
-int cltype20;
-int idtype21;
-const struct type* type_struct22;
-const char* var_class_name23;
-val* var24 /* : null */;
-short int var25 /* : Bool */;
-short int var26 /* : Bool */;
-short int var28 /* : Bool */;
-short int var29 /* : Bool */;
+short int var20 /* : Bool */;
+short int var21 /* : Bool */;
+short int var22 /* : Bool */;
+int cltype23;
+int idtype24;
+const struct type* type_struct25;
+const char* var_class_name26;
+val* var_ /* var : HashCollection[nullable Object] */;
+long var27 /* : Int */;
+long var28 /* : Int */;
 short int var30 /* : Bool */;
 int cltype31;
 int idtype32;
-const struct type* type_struct33;
-const char* var_class_name34;
-val* var_ /* var : HashCollection[nullable Object] */;
-long var35 /* : Int */;
-long var36 /* : Int */;
-long var37 /* : Int */;
-short int var39 /* : Bool */;
-int cltype40;
-int idtype41;
-const char* var_class_name42;
-long var43 /* : Int */;
-val* var44 /* : nullable HashNode[nullable Object] */;
-val* var45 /* : nullable HashNode[nullable Object] */;
-val* var46 /* : null */;
-short int var47 /* : Bool */;
-short int var48 /* : Bool */;
+const char* var_class_name33;
+long var34 /* : Int */;
+val* var35 /* : nullable HashNode[nullable Object] */;
+val* var36 /* : nullable HashNode[nullable Object] */;
+short int var37 /* : Bool */;
+short int var38 /* : Bool */;
+short int var40 /* : Bool */;
+short int var41 /* : Bool */;
+val* var42 /* : nullable NativeArray[nullable HashNode[nullable Object]] */;
+short int var44 /* : Bool */;
+int cltype45;
+int idtype46;
+const struct type* type_struct47;
+short int is_nullable;
+const char* var_class_name48;
+short int var49 /* : Bool */;
 short int var50 /* : Bool */;
-short int var51 /* : Bool */;
-val* var52 /* : nullable NativeArray[nullable HashNode[nullable Object]] */;
-short int var54 /* : Bool */;
-int cltype55;
-int idtype56;
-const struct type* type_struct57;
-short int is_nullable58;
-const char* var_class_name59;
-val* var60 /* : null */;
-short int var61 /* : Bool */;
-short int var62 /* : Bool */;
-short int var64 /* : Bool */;
-short int var65 /* : Bool */;
-val* var66 /* : null */;
-/* Covariant cast for argument 0 (k) <p0:nullable Object> isa K */
-/* <p0:nullable Object> isa K */
-type_struct = self->type->resolution_table->types[COLOR_standard__hash_collection__HashCollection___35dK];
-cltype = type_struct->color;
-idtype = type_struct->id;
-is_nullable = type_struct->is_nullable;
-if(p0 == NULL) {
-var = is_nullable;
-} else {
-if(cltype >= p0->type->table_size) {
-var = 0;
-} else {
-var = p0->type->type_table[cltype] == idtype;
-}
-}
-if (unlikely(!var)) {
-var_class_name = p0 == NULL ? "null" : p0->type->name;
-PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "K", var_class_name);
-PRINT_ERROR(" (%s:%d)\n", FILE_standard__hash_collection, 111);
-show_backtrace(1);
-}
+short int var52 /* : Bool */;
+short int var53 /* : Bool */;
 var_k = p0;
 {
-var1 = standard__hash_collection___standard__hash_collection__HashCollection___index_at(self, var_k);
+var = standard__hash_collection___standard__hash_collection__HashCollection___index_at(self, var_k);
 }
-var_i = var1;
+var_i = var;
 {
-var2 = standard__hash_collection___standard__hash_collection__HashCollection___node_at_idx(self, var_i, var_k);
+var1 = standard__hash_collection___standard__hash_collection__HashCollection___node_at_idx(self, var_i, var_k);
 }
-var_node = var2;
-var3 = NULL;
+var_node = var1;
 if (var_node == NULL) {
-var4 = 1; /* is null */
+var2 = 1; /* is null */
 } else {
-var4 = 0; /* arg is null but recv is not */
+var2 = 0; /* arg is null but recv is not */
 }
 if (0) {
-{ /* Inline kernel#Object#== (var_node,var3) on <var_node:nullable HashNode[nullable Object]> */
-var_other = var3;
+{ /* Inline kernel#Object#== (var_node,((val*)NULL)) on <var_node:nullable HashNode[nullable Object]> */
+var_other = ((val*)NULL);
 {
 { /* Inline kernel#Object#is_same_instance (var_node,var_other) on <var_node:nullable HashNode[nullable Object](HashNode[nullable Object])> */
-var9 = var_node == var_other;
-var7 = var9;
-goto RET_LABEL8;
-RET_LABEL8:(void)0;
-}
-}
+var7 = var_node == var_other;
 var5 = var7;
 goto RET_LABEL6;
 RET_LABEL6:(void)0;
 }
-var4 = var5;
 }
-if (var4){
+var3 = var5;
+goto RET_LABEL4;
+RET_LABEL4:(void)0;
+}
+var2 = var3;
+}
+if (var2){
 goto RET_LABEL;
 } else {
 }
-var10 = var_node->attrs[COLOR_standard__hash_collection__HashNode___prev_item].val; /* _prev_item on <var_node:nullable HashNode[nullable Object](HashNode[nullable Object])> */
-var_prev = var10;
-var11 = var_node->attrs[COLOR_standard__hash_collection__HashNode___next_item].val; /* _next_item on <var_node:nullable HashNode[nullable Object](HashNode[nullable Object])> */
-var_next = var11;
-var12 = NULL;
+var8 = var_node->attrs[COLOR_standard__hash_collection__HashNode___prev_item].val; /* _prev_item on <var_node:nullable HashNode[nullable Object](HashNode[nullable Object])> */
+var_prev = var8;
+var9 = var_node->attrs[COLOR_standard__hash_collection__HashNode___next_item].val; /* _next_item on <var_node:nullable HashNode[nullable Object](HashNode[nullable Object])> */
+var_next = var9;
 if (var_prev == NULL) {
-var13 = 0; /* is null */
+var10 = 0; /* is null */
 } else {
-var13 = 1; /* arg is null and recv is not */
+var10 = 1; /* arg is null and recv is not */
 }
 if (0) {
-{ /* Inline kernel#Object#!= (var_prev,var12) on <var_prev:nullable HashNode[nullable Object]> */
-var_other16 = var12;
+{ /* Inline kernel#Object#!= (var_prev,((val*)NULL)) on <var_prev:nullable HashNode[nullable Object]> */
+var_other13 = ((val*)NULL);
 {
-var17 = ((short int (*)(val* self, val* p0))(var_prev->class->vft[COLOR_standard__kernel__Object___61d_61d]))(var_prev, var_other16) /* == on <var_prev:nullable HashNode[nullable Object](HashNode[nullable Object])>*/;
+var14 = ((short int(*)(val* self, val* p0))(var_prev->class->vft[COLOR_standard__kernel__Object___61d_61d]))(var_prev, var_other13); /* == on <var_prev:nullable HashNode[nullable Object](HashNode[nullable Object])>*/
 }
-var18 = !var17;
-var14 = var18;
-goto RET_LABEL15;
-RET_LABEL15:(void)0;
+var15 = !var14;
+var11 = var15;
+goto RET_LABEL12;
+RET_LABEL12:(void)0;
 }
-var13 = var14;
+var10 = var11;
 }
-if (var13){
+if (var10){
 var_prev->attrs[COLOR_standard__hash_collection__HashNode___next_item].val = var_next; /* _next_item on <var_prev:nullable HashNode[nullable Object](HashNode[nullable Object])> */
 } else {
 /* <var_next:nullable HashNode[nullable Object]> isa nullable N */
-type_struct22 = self->type->resolution_table->types[COLOR_nullable__standard__hash_collection__HashCollection__N];
-cltype20 = type_struct22->color;
-idtype21 = type_struct22->id;
+type_struct = self->type->resolution_table->types[COLOR_nullable__standard__hash_collection__HashCollection__N];
+cltype = type_struct->color;
+idtype = type_struct->id;
 if(var_next == NULL) {
-var19 = 1;
+var16 = 1;
 } else {
-if(cltype20 >= var_next->type->table_size) {
-var19 = 0;
+if(cltype >= var_next->type->table_size) {
+var16 = 0;
 } else {
-var19 = var_next->type->type_table[cltype20] == idtype21;
+var16 = var_next->type->type_table[cltype] == idtype;
 }
 }
-if (unlikely(!var19)) {
-var_class_name23 = var_next == NULL ? "null" : var_next->type->name;
-PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "nullable N", var_class_name23);
+if (unlikely(!var16)) {
+var_class_name = var_next == NULL ? "null" : var_next->type->name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "nullable N", var_class_name);
 PRINT_ERROR(" (%s:%d)\n", FILE_standard__hash_collection, 124);
-show_backtrace(1);
+fatal_exit(1);
 }
 self->attrs[COLOR_standard__hash_collection__HashCollection___first_item].val = var_next; /* _first_item on <self:HashCollection[nullable Object]> */
 }
-var24 = NULL;
 if (var_next == NULL) {
-var25 = 0; /* is null */
+var17 = 0; /* is null */
 } else {
-var25 = 1; /* arg is null and recv is not */
+var17 = 1; /* arg is null and recv is not */
 }
 if (0) {
-{ /* Inline kernel#Object#!= (var_next,var24) on <var_next:nullable HashNode[nullable Object]> */
-var_other16 = var24;
+{ /* Inline kernel#Object#!= (var_next,((val*)NULL)) on <var_next:nullable HashNode[nullable Object]> */
+var_other13 = ((val*)NULL);
 {
-var28 = ((short int (*)(val* self, val* p0))(var_next->class->vft[COLOR_standard__kernel__Object___61d_61d]))(var_next, var_other16) /* == on <var_next:nullable HashNode[nullable Object](HashNode[nullable Object])>*/;
+var20 = ((short int(*)(val* self, val* p0))(var_next->class->vft[COLOR_standard__kernel__Object___61d_61d]))(var_next, var_other13); /* == on <var_next:nullable HashNode[nullable Object](HashNode[nullable Object])>*/
 }
-var29 = !var28;
-var26 = var29;
-goto RET_LABEL27;
-RET_LABEL27:(void)0;
+var21 = !var20;
+var18 = var21;
+goto RET_LABEL19;
+RET_LABEL19:(void)0;
 }
-var25 = var26;
+var17 = var18;
 }
-if (var25){
+if (var17){
 var_next->attrs[COLOR_standard__hash_collection__HashNode___prev_item].val = var_prev; /* _prev_item on <var_next:nullable HashNode[nullable Object](HashNode[nullable Object])> */
 } else {
 /* <var_prev:nullable HashNode[nullable Object]> isa nullable N */
-type_struct33 = self->type->resolution_table->types[COLOR_nullable__standard__hash_collection__HashCollection__N];
-cltype31 = type_struct33->color;
-idtype32 = type_struct33->id;
+type_struct25 = self->type->resolution_table->types[COLOR_nullable__standard__hash_collection__HashCollection__N];
+cltype23 = type_struct25->color;
+idtype24 = type_struct25->id;
 if(var_prev == NULL) {
-var30 = 1;
+var22 = 1;
 } else {
-if(cltype31 >= var_prev->type->table_size) {
-var30 = 0;
+if(cltype23 >= var_prev->type->table_size) {
+var22 = 0;
 } else {
-var30 = var_prev->type->type_table[cltype31] == idtype32;
+var22 = var_prev->type->type_table[cltype23] == idtype24;
 }
 }
-if (unlikely(!var30)) {
-var_class_name34 = var_prev == NULL ? "null" : var_prev->type->name;
-PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "nullable N", var_class_name34);
+if (unlikely(!var22)) {
+var_class_name26 = var_prev == NULL ? "null" : var_prev->type->name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "nullable N", var_class_name26);
 PRINT_ERROR(" (%s:%d)\n", FILE_standard__hash_collection, 129);
-show_backtrace(1);
+fatal_exit(1);
 }
 self->attrs[COLOR_standard__hash_collection__HashCollection___last_item].val = var_prev; /* _last_item on <self:HashCollection[nullable Object]> */
 }
 var_ = self;
-var35 = var_->attrs[COLOR_standard__hash_collection__HashCollection___the_length].l; /* _the_length on <var_:HashCollection[nullable Object]> */
-var36 = 1;
+var27 = var_->attrs[COLOR_standard__hash_collection__HashCollection___the_length].l; /* _the_length on <var_:HashCollection[nullable Object]> */
 {
-{ /* Inline kernel#Int#- (var35,var36) on <var35:Int> */
-/* Covariant cast for argument 0 (i) <var36:Int> isa OTHER */
-/* <var36:Int> isa OTHER */
-var39 = 1; /* easy <var36:Int> isa OTHER*/
-if (unlikely(!var39)) {
-var_class_name42 = type_standard__Int.name;
-PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name42);
-PRINT_ERROR(" (%s:%d)\n", FILE_standard__kernel, 416);
-show_backtrace(1);
-}
-var43 = var35 - var36;
-var37 = var43;
-goto RET_LABEL38;
-RET_LABEL38:(void)0;
-}
-}
-var_->attrs[COLOR_standard__hash_collection__HashCollection___the_length].l = var37; /* _the_length on <var_:HashCollection[nullable Object]> */
-var44 = var_node->attrs[COLOR_standard__hash_collection__HashNode___prev_in_bucklet].val; /* _prev_in_bucklet on <var_node:nullable HashNode[nullable Object](HashNode[nullable Object])> */
-var_prev = var44;
-var45 = var_node->attrs[COLOR_standard__hash_collection__HashNode___next_in_bucklet].val; /* _next_in_bucklet on <var_node:nullable HashNode[nullable Object](HashNode[nullable Object])> */
-var_next = var45;
-var46 = NULL;
+{ /* Inline kernel#Int#- (var27,1l) on <var27:Int> */
+/* Covariant cast for argument 0 (i) <1l:Int> isa OTHER */
+/* <1l:Int> isa OTHER */
+var30 = 1; /* easy <1l:Int> isa OTHER*/
+if (unlikely(!var30)) {
+var_class_name33 = type_standard__Int.name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name33);
+PRINT_ERROR(" (%s:%d)\n", FILE_standard__kernel, 540);
+fatal_exit(1);
+}
+var34 = var27 - 1l;
+var28 = var34;
+goto RET_LABEL29;
+RET_LABEL29:(void)0;
+}
+}
+var_->attrs[COLOR_standard__hash_collection__HashCollection___the_length].l = var28; /* _the_length on <var_:HashCollection[nullable Object]> */
+var35 = var_node->attrs[COLOR_standard__hash_collection__HashNode___prev_in_bucklet].val; /* _prev_in_bucklet on <var_node:nullable HashNode[nullable Object](HashNode[nullable Object])> */
+var_prev = var35;
+var36 = var_node->attrs[COLOR_standard__hash_collection__HashNode___next_in_bucklet].val; /* _next_in_bucklet on <var_node:nullable HashNode[nullable Object](HashNode[nullable Object])> */
+var_next = var36;
 if (var_prev == NULL) {
-var47 = 0; /* is null */
+var37 = 0; /* is null */
 } else {
-var47 = 1; /* arg is null and recv is not */
+var37 = 1; /* arg is null and recv is not */
 }
 if (0) {
-{ /* Inline kernel#Object#!= (var_prev,var46) on <var_prev:nullable HashNode[nullable Object]> */
-var_other16 = var46;
+{ /* Inline kernel#Object#!= (var_prev,((val*)NULL)) on <var_prev:nullable HashNode[nullable Object]> */
+var_other13 = ((val*)NULL);
 {
-var50 = ((short int (*)(val* self, val* p0))(var_prev->class->vft[COLOR_standard__kernel__Object___61d_61d]))(var_prev, var_other16) /* == on <var_prev:nullable HashNode[nullable Object](HashNode[nullable Object])>*/;
+var40 = ((short int(*)(val* self, val* p0))(var_prev->class->vft[COLOR_standard__kernel__Object___61d_61d]))(var_prev, var_other13); /* == on <var_prev:nullable HashNode[nullable Object](HashNode[nullable Object])>*/
 }
-var51 = !var50;
-var48 = var51;
-goto RET_LABEL49;
-RET_LABEL49:(void)0;
+var41 = !var40;
+var38 = var41;
+goto RET_LABEL39;
+RET_LABEL39:(void)0;
 }
-var47 = var48;
+var37 = var38;
 }
-if (var47){
+if (var37){
 var_prev->attrs[COLOR_standard__hash_collection__HashNode___next_in_bucklet].val = var_next; /* _next_in_bucklet on <var_prev:nullable HashNode[nullable Object](HashNode[nullable Object])> */
 } else {
-var52 = self->attrs[COLOR_standard__hash_collection__HashCollection___array].val; /* _array on <self:HashCollection[nullable Object]> */
-if (var52 == NULL) {
+var42 = self->attrs[COLOR_standard__hash_collection__HashCollection___array].val; /* _array on <self:HashCollection[nullable Object]> */
+if (var42 == NULL) {
 PRINT_ERROR("Runtime error: %s", "Receiver is null");
 PRINT_ERROR(" (%s:%d)\n", FILE_standard__hash_collection, 139);
-show_backtrace(1);
+fatal_exit(1);
 } else {
-{ /* Inline array#NativeArray#[]= (var52,var_i,var_next) on <var52:nullable NativeArray[nullable HashNode[nullable Object]]> */
+{ /* Inline array#NativeArray#[]= (var42,var_i,var_next) on <var42:nullable NativeArray[nullable HashNode[nullable Object]]> */
 /* Covariant cast for argument 1 (item) <var_next:nullable HashNode[nullable Object]> isa E */
 /* <var_next:nullable HashNode[nullable Object]> isa E */
-type_struct57 = var52->type->resolution_table->types[COLOR_standard__NativeArray___35dE];
-cltype55 = type_struct57->color;
-idtype56 = type_struct57->id;
-is_nullable58 = type_struct57->is_nullable;
+type_struct47 = var42->type->resolution_table->types[COLOR_standard__NativeArray___35dE];
+cltype45 = type_struct47->color;
+idtype46 = type_struct47->id;
+is_nullable = type_struct47->is_nullable;
 if(var_next == NULL) {
-var54 = is_nullable58;
+var44 = is_nullable;
 } else {
-if(cltype55 >= var_next->type->table_size) {
-var54 = 0;
+if(cltype45 >= var_next->type->table_size) {
+var44 = 0;
 } else {
-var54 = var_next->type->type_table[cltype55] == idtype56;
+var44 = var_next->type->type_table[cltype45] == idtype46;
 }
 }
-if (unlikely(!var54)) {
-var_class_name59 = var_next == NULL ? "null" : var_next->type->name;
-PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "E", var_class_name59);
-PRINT_ERROR(" (%s:%d)\n", FILE_standard__array, 808);
-show_backtrace(1);
+if (unlikely(!var44)) {
+var_class_name48 = var_next == NULL ? "null" : var_next->type->name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "E", var_class_name48);
+PRINT_ERROR(" (%s:%d)\n", FILE_standard__array, 957);
+fatal_exit(1);
 }
-((struct instance_standard__NativeArray*)var52)->values[var_i]=var_next;
-RET_LABEL53:(void)0;
+((struct instance_standard__NativeArray*)var42)->values[var_i]=var_next;
+RET_LABEL43:(void)0;
 }
 }
 }
-var60 = NULL;
 if (var_next == NULL) {
-var61 = 0; /* is null */
+var49 = 0; /* is null */
 } else {
-var61 = 1; /* arg is null and recv is not */
+var49 = 1; /* arg is null and recv is not */
 }
 if (0) {
-{ /* Inline kernel#Object#!= (var_next,var60) on <var_next:nullable HashNode[nullable Object]> */
-var_other16 = var60;
+{ /* Inline kernel#Object#!= (var_next,((val*)NULL)) on <var_next:nullable HashNode[nullable Object]> */
+var_other13 = ((val*)NULL);
 {
-var64 = ((short int (*)(val* self, val* p0))(var_next->class->vft[COLOR_standard__kernel__Object___61d_61d]))(var_next, var_other16) /* == on <var_next:nullable HashNode[nullable Object](HashNode[nullable Object])>*/;
+var52 = ((short int(*)(val* self, val* p0))(var_next->class->vft[COLOR_standard__kernel__Object___61d_61d]))(var_next, var_other13); /* == on <var_next:nullable HashNode[nullable Object](HashNode[nullable Object])>*/
 }
-var65 = !var64;
-var62 = var65;
-goto RET_LABEL63;
-RET_LABEL63:(void)0;
+var53 = !var52;
+var50 = var53;
+goto RET_LABEL51;
+RET_LABEL51:(void)0;
 }
-var61 = var62;
+var49 = var50;
 }
-if (var61){
+if (var49){
 var_next->attrs[COLOR_standard__hash_collection__HashNode___prev_in_bucklet].val = var_prev; /* _prev_in_bucklet on <var_next:nullable HashNode[nullable Object](HashNode[nullable Object])> */
 } else {
 }
-var66 = NULL;
-self->attrs[COLOR_standard__hash_collection__HashCollection___last_accessed_key].val = var66; /* _last_accessed_key on <self:HashCollection[nullable Object]> */
+self->attrs[COLOR_standard__hash_collection__HashCollection___last_accessed_key].val = ((val*)NULL); /* _last_accessed_key on <self:HashCollection[nullable Object]> */
 RET_LABEL:;
 }
 /* method hash_collection#HashCollection#raz for (self: HashCollection[nullable Object]) */
 void standard__hash_collection___standard__hash_collection__HashCollection___raz(val* self) {
 long var /* : Int */;
 long var1 /* : Int */;
-long var2 /* : Int */;
-short int var4 /* : Bool */;
+short int var3 /* : Bool */;
 int cltype;
 int idtype;
 const char* var_class_name;
-long var5 /* : Int */;
+long var4 /* : Int */;
 long var_i /* var i: Int */;
-long var6 /* : Int */;
+short int var5 /* : Bool */;
 short int var7 /* : Bool */;
-short int var9 /* : Bool */;
-int cltype10;
-int idtype11;
-const char* var_class_name12;
-short int var13 /* : Bool */;
-val* var14 /* : nullable NativeArray[nullable HashNode[nullable Object]] */;
-val* var15 /* : null */;
-short int var17 /* : Bool */;
-int cltype18;
-int idtype19;
+int cltype8;
+int idtype9;
+const char* var_class_name10;
+short int var11 /* : Bool */;
+val* var12 /* : nullable NativeArray[nullable HashNode[nullable Object]] */;
+short int var14 /* : Bool */;
+int cltype15;
+int idtype16;
 const struct type* type_struct;
 short int is_nullable;
-const char* var_class_name20;
-long var21 /* : Int */;
-long var22 /* : Int */;
-short int var24 /* : Bool */;
-int cltype25;
-int idtype26;
-const char* var_class_name27;
-long var28 /* : Int */;
-long var29 /* : Int */;
-val* var30 /* : null */;
-val* var31 /* : null */;
-val* var32 /* : null */;
+const char* var_class_name17;
+long var18 /* : Int */;
+short int var20 /* : Bool */;
+int cltype21;
+int idtype22;
+const char* var_class_name23;
+long var24 /* : Int */;
 var = self->attrs[COLOR_standard__hash_collection__HashCollection___capacity].l; /* _capacity on <self:HashCollection[nullable Object]> */
-var1 = 1;
 {
-{ /* Inline kernel#Int#- (var,var1) on <var:Int> */
-/* Covariant cast for argument 0 (i) <var1:Int> isa OTHER */
-/* <var1:Int> isa OTHER */
-var4 = 1; /* easy <var1:Int> isa OTHER*/
-if (unlikely(!var4)) {
+{ /* Inline kernel#Int#- (var,1l) on <var:Int> */
+/* Covariant cast for argument 0 (i) <1l:Int> isa OTHER */
+/* <1l:Int> isa OTHER */
+var3 = 1; /* easy <1l:Int> isa OTHER*/
+if (unlikely(!var3)) {
 var_class_name = type_standard__Int.name;
 PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name);
-PRINT_ERROR(" (%s:%d)\n", FILE_standard__kernel, 416);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_standard__kernel, 540);
+fatal_exit(1);
 }
-var5 = var - var1;
-var2 = var5;
-goto RET_LABEL3;
-RET_LABEL3:(void)0;
+var4 = var - 1l;
+var1 = var4;
+goto RET_LABEL2;
+RET_LABEL2:(void)0;
 }
 }
-var_i = var2;
+var_i = var1;
 for(;;) {
-var6 = 0;
 {
-{ /* Inline kernel#Int#>= (var_i,var6) on <var_i:Int> */
-/* Covariant cast for argument 0 (i) <var6:Int> isa OTHER */
-/* <var6:Int> isa OTHER */
-var9 = 1; /* easy <var6:Int> isa OTHER*/
-if (unlikely(!var9)) {
-var_class_name12 = type_standard__Int.name;
-PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name12);
-PRINT_ERROR(" (%s:%d)\n", FILE_standard__kernel, 411);
-show_backtrace(1);
-}
-var13 = var_i >= var6;
-var7 = var13;
-goto RET_LABEL8;
-RET_LABEL8:(void)0;
+{ /* Inline kernel#Int#>= (var_i,0l) on <var_i:Int> */
+/* Covariant cast for argument 0 (i) <0l:Int> isa OTHER */
+/* <0l:Int> isa OTHER */
+var7 = 1; /* easy <0l:Int> isa OTHER*/
+if (unlikely(!var7)) {
+var_class_name10 = type_standard__Int.name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name10);
+PRINT_ERROR(" (%s:%d)\n", FILE_standard__kernel, 535);
+fatal_exit(1);
+}
+var11 = var_i >= 0l;
+var5 = var11;
+goto RET_LABEL6;
+RET_LABEL6:(void)0;
 }
 }
-if (var7){
-var14 = self->attrs[COLOR_standard__hash_collection__HashCollection___array].val; /* _array on <self:HashCollection[nullable Object]> */
-var15 = NULL;
-if (var14 == NULL) {
+if (var5){
+var12 = self->attrs[COLOR_standard__hash_collection__HashCollection___array].val; /* _array on <self:HashCollection[nullable Object]> */
+if (var12 == NULL) {
 PRINT_ERROR("Runtime error: %s", "Receiver is null");
 PRINT_ERROR(" (%s:%d)\n", FILE_standard__hash_collection, 153);
-show_backtrace(1);
-} else {
-{ /* Inline array#NativeArray#[]= (var14,var_i,var15) on <var14:nullable NativeArray[nullable HashNode[nullable Object]]> */
-/* Covariant cast for argument 1 (item) <var15:null> isa E */
-/* <var15:null> isa E */
-type_struct = var14->type->resolution_table->types[COLOR_standard__NativeArray___35dE];
-cltype18 = type_struct->color;
-idtype19 = type_struct->id;
+fatal_exit(1);
+} else {
+{ /* Inline array#NativeArray#[]= (var12,var_i,((val*)NULL)) on <var12:nullable NativeArray[nullable HashNode[nullable Object]]> */
+/* Covariant cast for argument 1 (item) <((val*)NULL):null> isa E */
+/* <((val*)NULL):null> isa E */
+type_struct = var12->type->resolution_table->types[COLOR_standard__NativeArray___35dE];
+cltype15 = type_struct->color;
+idtype16 = type_struct->id;
 is_nullable = type_struct->is_nullable;
-if(var15 == NULL) {
-var17 = is_nullable;
+if(((val*)NULL) == NULL) {
+var14 = is_nullable;
 } else {
-if(cltype18 >= var15->type->table_size) {
-var17 = 0;
+if(cltype15 >= ((val*)NULL)->type->table_size) {
+var14 = 0;
 } else {
-var17 = var15->type->type_table[cltype18] == idtype19;
+var14 = ((val*)NULL)->type->type_table[cltype15] == idtype16;
 }
 }
-if (unlikely(!var17)) {
-var_class_name20 = var15 == NULL ? "null" : var15->type->name;
-PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "E", var_class_name20);
-PRINT_ERROR(" (%s:%d)\n", FILE_standard__array, 808);
-show_backtrace(1);
+if (unlikely(!var14)) {
+var_class_name17 = ((val*)NULL) == NULL ? "null" : ((val*)NULL)->type->name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "E", var_class_name17);
+PRINT_ERROR(" (%s:%d)\n", FILE_standard__array, 957);
+fatal_exit(1);
 }
-((struct instance_standard__NativeArray*)var14)->values[var_i]=var15;
-RET_LABEL16:(void)0;
+((struct instance_standard__NativeArray*)var12)->values[var_i]=((val*)NULL);
+RET_LABEL13:(void)0;
 }
 }
-var21 = 1;
 {
-{ /* Inline kernel#Int#- (var_i,var21) on <var_i:Int> */
-/* Covariant cast for argument 0 (i) <var21:Int> isa OTHER */
-/* <var21:Int> isa OTHER */
-var24 = 1; /* easy <var21:Int> isa OTHER*/
-if (unlikely(!var24)) {
-var_class_name27 = type_standard__Int.name;
-PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name27);
-PRINT_ERROR(" (%s:%d)\n", FILE_standard__kernel, 416);
-show_backtrace(1);
+{ /* Inline kernel#Int#- (var_i,1l) on <var_i:Int> */
+/* Covariant cast for argument 0 (i) <1l:Int> isa OTHER */
+/* <1l:Int> isa OTHER */
+var20 = 1; /* easy <1l:Int> isa OTHER*/
+if (unlikely(!var20)) {
+var_class_name23 = type_standard__Int.name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name23);
+PRINT_ERROR(" (%s:%d)\n", FILE_standard__kernel, 540);
+fatal_exit(1);
 }
-var28 = var_i - var21;
-var22 = var28;
-goto RET_LABEL23;
-RET_LABEL23:(void)0;
+var24 = var_i - 1l;
+var18 = var24;
+goto RET_LABEL19;
+RET_LABEL19:(void)0;
 }
 }
-var_i = var22;
+var_i = var18;
 } else {
 goto BREAK_label;
 }
 }
 BREAK_label: (void)0;
-var29 = 0;
-self->attrs[COLOR_standard__hash_collection__HashCollection___the_length].l = var29; /* _the_length on <self:HashCollection[nullable Object]> */
-var30 = NULL;
-self->attrs[COLOR_standard__hash_collection__HashCollection___first_item].val = var30; /* _first_item on <self:HashCollection[nullable Object]> */
-var31 = NULL;
-self->attrs[COLOR_standard__hash_collection__HashCollection___last_item].val = var31; /* _last_item on <self:HashCollection[nullable Object]> */
-var32 = NULL;
-self->attrs[COLOR_standard__hash_collection__HashCollection___last_accessed_key].val = var32; /* _last_accessed_key on <self:HashCollection[nullable Object]> */
+self->attrs[COLOR_standard__hash_collection__HashCollection___the_length].l = 0l; /* _the_length on <self:HashCollection[nullable Object]> */
+self->attrs[COLOR_standard__hash_collection__HashCollection___first_item].val = ((val*)NULL); /* _first_item on <self:HashCollection[nullable Object]> */
+self->attrs[COLOR_standard__hash_collection__HashCollection___last_item].val = ((val*)NULL); /* _last_item on <self:HashCollection[nullable Object]> */
+self->attrs[COLOR_standard__hash_collection__HashCollection___last_accessed_key].val = ((val*)NULL); /* _last_accessed_key on <self:HashCollection[nullable Object]> */
 RET_LABEL:;
 }
 /* method hash_collection#HashCollection#enlarge for (self: HashCollection[nullable Object], Int) */
@@ -1197,417 +1027,397 @@ long var /* : Int */;
 long var_old_cap /* var old_cap: Int */;
 long var1 /* : Int */;
 long var2 /* : Int */;
-long var3 /* : Int */;
-short int var5 /* : Bool */;
+short int var4 /* : Bool */;
 int cltype;
 int idtype;
 const char* var_class_name;
-long var6 /* : Int */;
-short int var7 /* : Bool */;
-short int var9 /* : Bool */;
-int cltype10;
-int idtype11;
-const char* var_class_name12;
-short int var13 /* : Bool */;
+long var5 /* : Int */;
+short int var6 /* : Bool */;
+short int var8 /* : Bool */;
+int cltype9;
+int idtype10;
+const char* var_class_name11;
+short int var12 /* : Bool */;
+long var13 /* : Int */;
 long var14 /* : Int */;
-long var15 /* : Int */;
-long var16 /* : Int */;
-short int var18 /* : Bool */;
-int cltype19;
-int idtype20;
-const char* var_class_name21;
-long var22 /* : Int */;
-long var23 /* : Int */;
+short int var16 /* : Bool */;
+int cltype17;
+int idtype18;
+const char* var_class_name19;
+long var20 /* : Int */;
+long var21 /* : Int */;
+short int var22 /* : Bool */;
 short int var24 /* : Bool */;
-short int var26 /* : Bool */;
-int cltype27;
-int idtype28;
-const char* var_class_name29;
-short int var30 /* : Bool */;
-val* var31 /* : null */;
-val* var32 /* : NativeArray[nullable HashNode[nullable Object]] */;
+int cltype25;
+int idtype26;
+const char* var_class_name27;
+short int var28 /* : Bool */;
+val* var29 /* : NativeArray[nullable HashNode[nullable Object]] */;
 val* var_new_array /* var new_array: NativeArray[nullable HashNode[nullable Object]] */;
-long var33 /* : Int */;
-long var34 /* : Int */;
-short int var36 /* : Bool */;
-int cltype37;
-int idtype38;
-const char* var_class_name39;
-long var40 /* : Int */;
+long var30 /* : Int */;
+short int var32 /* : Bool */;
+int cltype33;
+int idtype34;
+const char* var_class_name35;
+long var36 /* : Int */;
 long var_i /* var i: Int */;
-long var41 /* : Int */;
-short int var42 /* : Bool */;
-short int var44 /* : Bool */;
-int cltype45;
-int idtype46;
-const char* var_class_name47;
-short int var48 /* : Bool */;
-val* var49 /* : null */;
+short int var37 /* : Bool */;
+short int var39 /* : Bool */;
+int cltype40;
+int idtype41;
+const char* var_class_name42;
+short int var43 /* : Bool */;
+short int var45 /* : Bool */;
+int cltype46;
+int idtype47;
+const struct type* type_struct;
+short int is_nullable;
+const char* var_class_name48;
+long var49 /* : Int */;
 short int var51 /* : Bool */;
 int cltype52;
 int idtype53;
-const struct type* type_struct;
-short int is_nullable;
 const char* var_class_name54;
 long var55 /* : Int */;
 long var56 /* : Int */;
-short int var58 /* : Bool */;
-int cltype59;
-int idtype60;
-const char* var_class_name61;
-long var62 /* : Int */;
-long var63 /* : Int */;
-short int var64 /* : Bool */;
-short int var66 /* : Bool */;
-int cltype67;
-int idtype68;
-const char* var_class_name69;
-short int var70 /* : Bool */;
-val* var71 /* : nullable HashNode[nullable Object] */;
+short int var57 /* : Bool */;
+short int var59 /* : Bool */;
+int cltype60;
+int idtype61;
+const char* var_class_name62;
+short int var63 /* : Bool */;
+val* var64 /* : nullable HashNode[nullable Object] */;
 val* var_node /* var node: nullable HashNode[nullable Object] */;
-val* var72 /* : null */;
-short int var73 /* : Bool */;
-short int var74 /* : Bool */;
+short int var65 /* : Bool */;
+short int var66 /* : Bool */;
 val* var_other /* var other: nullable Object */;
-short int var76 /* : Bool */;
-short int var77 /* : Bool */;
-val* var78 /* : nullable Object */;
-long var79 /* : Int */;
+short int var68 /* : Bool */;
+short int var69 /* : Bool */;
+val* var70 /* : nullable Object */;
+long var71 /* : Int */;
 long var_index /* var index: Int */;
-val* var80 /* : nullable Object */;
-val* var82 /* : nullable HashNode[nullable Object] */;
+val* var72 /* : nullable Object */;
+val* var74 /* : Object */;
 val* var_next /* var next: nullable HashNode[nullable Object] */;
+short int var76 /* : Bool */;
+int cltype77;
+int idtype78;
+const struct type* type_struct79;
+const char* var_class_name80;
+short int var81 /* : Bool */;
+short int var82 /* : Bool */;
 short int var84 /* : Bool */;
-int cltype85;
-int idtype86;
-const struct type* type_struct87;
-const char* var_class_name88;
-val* var89 /* : null */;
-val* var90 /* : null */;
-short int var91 /* : Bool */;
-short int var92 /* : Bool */;
-short int var94 /* : Bool */;
-short int var95 /* : Bool */;
-val* var96 /* : nullable HashNode[nullable Object] */;
-short int var97 /* : Bool */;
-int cltype98;
-int idtype99;
-const struct type* type_struct100;
-const char* var_class_name101;
+short int var85 /* : Bool */;
+val* var86 /* : nullable HashNode[nullable Object] */;
+short int var87 /* : Bool */;
+int cltype88;
+int idtype89;
+const struct type* type_struct90;
+const char* var_class_name91;
 var_cap = p0;
 var = self->attrs[COLOR_standard__hash_collection__HashCollection___capacity].l; /* _capacity on <self:HashCollection[nullable Object]> */
 var_old_cap = var;
 var1 = self->attrs[COLOR_standard__hash_collection__HashCollection___the_length].l; /* _the_length on <self:HashCollection[nullable Object]> */
-var2 = 1;
 {
-{ /* Inline kernel#Int#+ (var1,var2) on <var1:Int> */
-/* Covariant cast for argument 0 (i) <var2:Int> isa OTHER */
-/* <var2:Int> isa OTHER */
-var5 = 1; /* easy <var2:Int> isa OTHER*/
-if (unlikely(!var5)) {
+{ /* Inline kernel#Int#+ (var1,1l) on <var1:Int> */
+/* Covariant cast for argument 0 (i) <1l:Int> isa OTHER */
+/* <1l:Int> isa OTHER */
+var4 = 1; /* easy <1l:Int> isa OTHER*/
+if (unlikely(!var4)) {
 var_class_name = type_standard__Int.name;
 PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name);
-PRINT_ERROR(" (%s:%d)\n", FILE_standard__kernel, 413);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_standard__kernel, 537);
+fatal_exit(1);
 }
-var6 = var1 + var2;
-var3 = var6;
-goto RET_LABEL4;
-RET_LABEL4:(void)0;
+var5 = var1 + 1l;
+var2 = var5;
+goto RET_LABEL3;
+RET_LABEL3:(void)0;
 }
 }
 {
-{ /* Inline kernel#Int#< (var_cap,var3) on <var_cap:Int> */
-/* Covariant cast for argument 0 (i) <var3:Int> isa OTHER */
-/* <var3:Int> isa OTHER */
-var9 = 1; /* easy <var3:Int> isa OTHER*/
-if (unlikely(!var9)) {
-var_class_name12 = type_standard__Int.name;
-PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name12);
-PRINT_ERROR(" (%s:%d)\n", FILE_standard__kernel, 410);
-show_backtrace(1);
-}
-var13 = var_cap < var3;
-var7 = var13;
-goto RET_LABEL8;
-RET_LABEL8:(void)0;
-}
+{ /* Inline kernel#Int#< (var_cap,var2) on <var_cap:Int> */
+/* Covariant cast for argument 0 (i) <var2:Int> isa OTHER */
+/* <var2:Int> isa OTHER */
+var8 = 1; /* easy <var2:Int> isa OTHER*/
+if (unlikely(!var8)) {
+var_class_name11 = type_standard__Int.name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name11);
+PRINT_ERROR(" (%s:%d)\n", FILE_standard__kernel, 534);
+fatal_exit(1);
+}
+var12 = var_cap < var2;
+var6 = var12;
+goto RET_LABEL7;
+RET_LABEL7:(void)0;
 }
-if (var7){
-var14 = self->attrs[COLOR_standard__hash_collection__HashCollection___the_length].l; /* _the_length on <self:HashCollection[nullable Object]> */
-var15 = 1;
-{
-{ /* Inline kernel#Int#+ (var14,var15) on <var14:Int> */
-/* Covariant cast for argument 0 (i) <var15:Int> isa OTHER */
-/* <var15:Int> isa OTHER */
-var18 = 1; /* easy <var15:Int> isa OTHER*/
-if (unlikely(!var18)) {
-var_class_name21 = type_standard__Int.name;
-PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name21);
-PRINT_ERROR(" (%s:%d)\n", FILE_standard__kernel, 413);
-show_backtrace(1);
 }
-var22 = var14 + var15;
-var16 = var22;
-goto RET_LABEL17;
-RET_LABEL17:(void)0;
+if (var6){
+var13 = self->attrs[COLOR_standard__hash_collection__HashCollection___the_length].l; /* _the_length on <self:HashCollection[nullable Object]> */
+{
+{ /* Inline kernel#Int#+ (var13,1l) on <var13:Int> */
+/* Covariant cast for argument 0 (i) <1l:Int> isa OTHER */
+/* <1l:Int> isa OTHER */
+var16 = 1; /* easy <1l:Int> isa OTHER*/
+if (unlikely(!var16)) {
+var_class_name19 = type_standard__Int.name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name19);
+PRINT_ERROR(" (%s:%d)\n", FILE_standard__kernel, 537);
+fatal_exit(1);
+}
+var20 = var13 + 1l;
+var14 = var20;
+goto RET_LABEL15;
+RET_LABEL15:(void)0;
 }
 }
-var_cap = var16;
+var_cap = var14;
 } else {
 }
-var23 = self->attrs[COLOR_standard__hash_collection__HashCollection___capacity].l; /* _capacity on <self:HashCollection[nullable Object]> */
+var21 = self->attrs[COLOR_standard__hash_collection__HashCollection___capacity].l; /* _capacity on <self:HashCollection[nullable Object]> */
 {
-{ /* Inline kernel#Int#<= (var_cap,var23) on <var_cap:Int> */
-/* Covariant cast for argument 0 (i) <var23:Int> isa OTHER */
-/* <var23:Int> isa OTHER */
-var26 = 1; /* easy <var23:Int> isa OTHER*/
-if (unlikely(!var26)) {
-var_class_name29 = type_standard__Int.name;
-PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name29);
-PRINT_ERROR(" (%s:%d)\n", FILE_standard__kernel, 409);
-show_backtrace(1);
+{ /* Inline kernel#Int#<= (var_cap,var21) on <var_cap:Int> */
+/* Covariant cast for argument 0 (i) <var21:Int> isa OTHER */
+/* <var21:Int> isa OTHER */
+var24 = 1; /* easy <var21:Int> isa OTHER*/
+if (unlikely(!var24)) {
+var_class_name27 = type_standard__Int.name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name27);
+PRINT_ERROR(" (%s:%d)\n", FILE_standard__kernel, 533);
+fatal_exit(1);
 }
-var30 = var_cap <= var23;
-var24 = var30;
-goto RET_LABEL25;
-RET_LABEL25:(void)0;
+var28 = var_cap <= var21;
+var22 = var28;
+goto RET_LABEL23;
+RET_LABEL23:(void)0;
 }
 }
-if (var24){
+if (var22){
 goto RET_LABEL;
 } else {
 }
 self->attrs[COLOR_standard__hash_collection__HashCollection___capacity].l = var_cap; /* _capacity on <self:HashCollection[nullable Object]> */
-var31 = NULL;
-self->attrs[COLOR_standard__hash_collection__HashCollection___last_accessed_key].val = var31; /* _last_accessed_key on <self:HashCollection[nullable Object]> */
-var32 = NEW_standard__NativeArray(var_cap, self->type->resolution_table->types[COLOR_standard__NativeArray__nullable__standard__hash_collection__HashCollection__N]);
-var_new_array = var32;
+self->attrs[COLOR_standard__hash_collection__HashCollection___last_accessed_key].val = ((val*)NULL); /* _last_accessed_key on <self:HashCollection[nullable Object]> */
+var29 = NEW_standard__NativeArray(var_cap, self->type->resolution_table->types[COLOR_standard__NativeArray__nullable__standard__hash_collection__HashCollection__N]);
+var_new_array = var29;
 self->attrs[COLOR_standard__hash_collection__HashCollection___array].val = var_new_array; /* _array on <self:HashCollection[nullable Object]> */
-var33 = 1;
 {
-{ /* Inline kernel#Int#- (var_cap,var33) on <var_cap:Int> */
-/* Covariant cast for argument 0 (i) <var33:Int> isa OTHER */
-/* <var33:Int> isa OTHER */
-var36 = 1; /* easy <var33:Int> isa OTHER*/
-if (unlikely(!var36)) {
-var_class_name39 = type_standard__Int.name;
-PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name39);
-PRINT_ERROR(" (%s:%d)\n", FILE_standard__kernel, 416);
-show_backtrace(1);
+{ /* Inline kernel#Int#- (var_cap,1l) on <var_cap:Int> */
+/* Covariant cast for argument 0 (i) <1l:Int> isa OTHER */
+/* <1l:Int> isa OTHER */
+var32 = 1; /* easy <1l:Int> isa OTHER*/
+if (unlikely(!var32)) {
+var_class_name35 = type_standard__Int.name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name35);
+PRINT_ERROR(" (%s:%d)\n", FILE_standard__kernel, 540);
+fatal_exit(1);
 }
-var40 = var_cap - var33;
-var34 = var40;
-goto RET_LABEL35;
-RET_LABEL35:(void)0;
+var36 = var_cap - 1l;
+var30 = var36;
+goto RET_LABEL31;
+RET_LABEL31:(void)0;
 }
 }
-var_i = var34;
+var_i = var30;
 for(;;) {
-var41 = 0;
 {
-{ /* Inline kernel#Int#>= (var_i,var41) on <var_i:Int> */
-/* Covariant cast for argument 0 (i) <var41:Int> isa OTHER */
-/* <var41:Int> isa OTHER */
-var44 = 1; /* easy <var41:Int> isa OTHER*/
-if (unlikely(!var44)) {
-var_class_name47 = type_standard__Int.name;
-PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name47);
-PRINT_ERROR(" (%s:%d)\n", FILE_standard__kernel, 411);
-show_backtrace(1);
-}
-var48 = var_i >= var41;
-var42 = var48;
-goto RET_LABEL43;
-RET_LABEL43:(void)0;
+{ /* Inline kernel#Int#>= (var_i,0l) on <var_i:Int> */
+/* Covariant cast for argument 0 (i) <0l:Int> isa OTHER */
+/* <0l:Int> isa OTHER */
+var39 = 1; /* easy <0l:Int> isa OTHER*/
+if (unlikely(!var39)) {
+var_class_name42 = type_standard__Int.name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name42);
+PRINT_ERROR(" (%s:%d)\n", FILE_standard__kernel, 535);
+fatal_exit(1);
+}
+var43 = var_i >= 0l;
+var37 = var43;
+goto RET_LABEL38;
+RET_LABEL38:(void)0;
 }
 }
-if (var42){
-var49 = NULL;
+if (var37){
 {
-{ /* Inline array#NativeArray#[]= (var_new_array,var_i,var49) on <var_new_array:NativeArray[nullable HashNode[nullable Object]]> */
-/* Covariant cast for argument 1 (item) <var49:null> isa E */
-/* <var49:null> isa E */
+{ /* Inline array#NativeArray#[]= (var_new_array,var_i,((val*)NULL)) on <var_new_array:NativeArray[nullable HashNode[nullable Object]]> */
+/* Covariant cast for argument 1 (item) <((val*)NULL):null> isa E */
+/* <((val*)NULL):null> isa E */
 type_struct = var_new_array->type->resolution_table->types[COLOR_standard__NativeArray___35dE];
-cltype52 = type_struct->color;
-idtype53 = type_struct->id;
+cltype46 = type_struct->color;
+idtype47 = type_struct->id;
 is_nullable = type_struct->is_nullable;
-if(var49 == NULL) {
-var51 = is_nullable;
+if(((val*)NULL) == NULL) {
+var45 = is_nullable;
 } else {
-if(cltype52 >= var49->type->table_size) {
-var51 = 0;
+if(cltype46 >= ((val*)NULL)->type->table_size) {
+var45 = 0;
 } else {
-var51 = var49->type->type_table[cltype52] == idtype53;
+var45 = ((val*)NULL)->type->type_table[cltype46] == idtype47;
 }
 }
-if (unlikely(!var51)) {
-var_class_name54 = var49 == NULL ? "null" : var49->type->name;
-PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "E", var_class_name54);
-PRINT_ERROR(" (%s:%d)\n", FILE_standard__array, 808);
-show_backtrace(1);
+if (unlikely(!var45)) {
+var_class_name48 = ((val*)NULL) == NULL ? "null" : ((val*)NULL)->type->name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "E", var_class_name48);
+PRINT_ERROR(" (%s:%d)\n", FILE_standard__array, 957);
+fatal_exit(1);
 }
-((struct instance_standard__NativeArray*)var_new_array)->values[var_i]=var49;
-RET_LABEL50:(void)0;
+((struct instance_standard__NativeArray*)var_new_array)->values[var_i]=((val*)NULL);
+RET_LABEL44:(void)0;
 }
 }
-var55 = 1;
 {
-{ /* Inline kernel#Int#- (var_i,var55) on <var_i:Int> */
-/* Covariant cast for argument 0 (i) <var55:Int> isa OTHER */
-/* <var55:Int> isa OTHER */
-var58 = 1; /* easy <var55:Int> isa OTHER*/
-if (unlikely(!var58)) {
-var_class_name61 = type_standard__Int.name;
-PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name61);
-PRINT_ERROR(" (%s:%d)\n", FILE_standard__kernel, 416);
-show_backtrace(1);
+{ /* Inline kernel#Int#- (var_i,1l) on <var_i:Int> */
+/* Covariant cast for argument 0 (i) <1l:Int> isa OTHER */
+/* <1l:Int> isa OTHER */
+var51 = 1; /* easy <1l:Int> isa OTHER*/
+if (unlikely(!var51)) {
+var_class_name54 = type_standard__Int.name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name54);
+PRINT_ERROR(" (%s:%d)\n", FILE_standard__kernel, 540);
+fatal_exit(1);
 }
-var62 = var_i - var55;
-var56 = var62;
-goto RET_LABEL57;
-RET_LABEL57:(void)0;
+var55 = var_i - 1l;
+var49 = var55;
+goto RET_LABEL50;
+RET_LABEL50:(void)0;
 }
 }
-var_i = var56;
+var_i = var49;
 } else {
 goto BREAK_label;
 }
 }
 BREAK_label: (void)0;
-var63 = self->attrs[COLOR_standard__hash_collection__HashCollection___capacity].l; /* _capacity on <self:HashCollection[nullable Object]> */
+var56 = self->attrs[COLOR_standard__hash_collection__HashCollection___capacity].l; /* _capacity on <self:HashCollection[nullable Object]> */
 {
-{ /* Inline kernel#Int#<= (var63,var_old_cap) on <var63:Int> */
+{ /* Inline kernel#Int#<= (var56,var_old_cap) on <var56:Int> */
 /* Covariant cast for argument 0 (i) <var_old_cap:Int> isa OTHER */
 /* <var_old_cap:Int> isa OTHER */
-var66 = 1; /* easy <var_old_cap:Int> isa OTHER*/
-if (unlikely(!var66)) {
-var_class_name69 = type_standard__Int.name;
-PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name69);
-PRINT_ERROR(" (%s:%d)\n", FILE_standard__kernel, 409);
-show_backtrace(1);
+var59 = 1; /* easy <var_old_cap:Int> isa OTHER*/
+if (unlikely(!var59)) {
+var_class_name62 = type_standard__Int.name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name62);
+PRINT_ERROR(" (%s:%d)\n", FILE_standard__kernel, 533);
+fatal_exit(1);
 }
-var70 = var63 <= var_old_cap;
-var64 = var70;
-goto RET_LABEL65;
-RET_LABEL65:(void)0;
+var63 = var56 <= var_old_cap;
+var57 = var63;
+goto RET_LABEL58;
+RET_LABEL58:(void)0;
 }
 }
-if (var64){
+if (var57){
 goto RET_LABEL;
 } else {
 }
-var71 = self->attrs[COLOR_standard__hash_collection__HashCollection___first_item].val; /* _first_item on <self:HashCollection[nullable Object]> */
-var_node = var71;
+var64 = self->attrs[COLOR_standard__hash_collection__HashCollection___first_item].val; /* _first_item on <self:HashCollection[nullable Object]> */
+var_node = var64;
 for(;;) {
-var72 = NULL;
 if (var_node == NULL) {
-var73 = 0; /* is null */
+var65 = 0; /* is null */
 } else {
-var73 = 1; /* arg is null and recv is not */
+var65 = 1; /* arg is null and recv is not */
 }
 if (0) {
-{ /* Inline kernel#Object#!= (var_node,var72) on <var_node:nullable HashNode[nullable Object]> */
-var_other = var72;
+{ /* Inline kernel#Object#!= (var_node,((val*)NULL)) on <var_node:nullable HashNode[nullable Object]> */
+var_other = ((val*)NULL);
 {
-var76 = ((short int (*)(val* self, val* p0))(var_node->class->vft[COLOR_standard__kernel__Object___61d_61d]))(var_node, var_other) /* == on <var_node:nullable HashNode[nullable Object](HashNode[nullable Object])>*/;
+var68 = ((short int(*)(val* self, val* p0))(var_node->class->vft[COLOR_standard__kernel__Object___61d_61d]))(var_node, var_other); /* == on <var_node:nullable HashNode[nullable Object](HashNode[nullable Object])>*/
 }
-var77 = !var76;
-var74 = var77;
-goto RET_LABEL75;
-RET_LABEL75:(void)0;
+var69 = !var68;
+var66 = var69;
+goto RET_LABEL67;
+RET_LABEL67:(void)0;
 }
-var73 = var74;
+var65 = var66;
 }
-if (var73){
-var78 = var_node->attrs[COLOR_standard__hash_collection__HashNode___key].val; /* _key on <var_node:nullable HashNode[nullable Object](HashNode[nullable Object])> */
+if (var65){
+var70 = var_node->attrs[COLOR_standard__hash_collection__HashNode___key].val; /* _key on <var_node:nullable HashNode[nullable Object](HashNode[nullable Object])> */
 {
-var79 = standard__hash_collection___standard__hash_collection__HashCollection___index_at(self, var78);
+var71 = standard__hash_collection___standard__hash_collection__HashCollection___index_at(self, var70);
 }
-var_index = var79;
+var_index = var71;
 {
 { /* Inline array#NativeArray#[] (var_new_array,var_index) on <var_new_array:NativeArray[nullable HashNode[nullable Object]]> */
-var82 = ((struct instance_standard__NativeArray*)var_new_array)->values[var_index];
-var80 = var82;
-goto RET_LABEL81;
-RET_LABEL81:(void)0;
+var74 = ((struct instance_standard__NativeArray*)var_new_array)->values[var_index];
+var72 = var74;
+goto RET_LABEL73;
+RET_LABEL73:(void)0;
 }
 }
-var_next = var80;
+var_next = var72;
 {
 { /* Inline array#NativeArray#[]= (var_new_array,var_index,var_node) on <var_new_array:NativeArray[nullable HashNode[nullable Object]]> */
 /* Covariant cast for argument 1 (item) <var_node:nullable HashNode[nullable Object](HashNode[nullable Object])> isa E */
 /* <var_node:nullable HashNode[nullable Object](HashNode[nullable Object])> isa E */
-type_struct87 = var_new_array->type->resolution_table->types[COLOR_standard__NativeArray___35dE];
-cltype85 = type_struct87->color;
-idtype86 = type_struct87->id;
-if(cltype85 >= var_node->type->table_size) {
-var84 = 0;
+type_struct79 = var_new_array->type->resolution_table->types[COLOR_standard__NativeArray___35dE];
+cltype77 = type_struct79->color;
+idtype78 = type_struct79->id;
+if(cltype77 >= var_node->type->table_size) {
+var76 = 0;
 } else {
-var84 = var_node->type->type_table[cltype85] == idtype86;
+var76 = var_node->type->type_table[cltype77] == idtype78;
 }
-if (unlikely(!var84)) {
-var_class_name88 = var_node == NULL ? "null" : var_node->type->name;
-PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "E", var_class_name88);
-PRINT_ERROR(" (%s:%d)\n", FILE_standard__array, 808);
-show_backtrace(1);
+if (unlikely(!var76)) {
+var_class_name80 = var_node == NULL ? "null" : var_node->type->name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "E", var_class_name80);
+PRINT_ERROR(" (%s:%d)\n", FILE_standard__array, 957);
+fatal_exit(1);
 }
 ((struct instance_standard__NativeArray*)var_new_array)->values[var_index]=var_node;
-RET_LABEL83:(void)0;
+RET_LABEL75:(void)0;
 }
 }
-var89 = NULL;
-var_node->attrs[COLOR_standard__hash_collection__HashNode___prev_in_bucklet].val = var89; /* _prev_in_bucklet on <var_node:nullable HashNode[nullable Object](HashNode[nullable Object])> */
+var_node->attrs[COLOR_standard__hash_collection__HashNode___prev_in_bucklet].val = ((val*)NULL); /* _prev_in_bucklet on <var_node:nullable HashNode[nullable Object](HashNode[nullable Object])> */
 var_node->attrs[COLOR_standard__hash_collection__HashNode___next_in_bucklet].val = var_next; /* _next_in_bucklet on <var_node:nullable HashNode[nullable Object](HashNode[nullable Object])> */
-var90 = NULL;
 if (var_next == NULL) {
-var91 = 0; /* is null */
+var81 = 0; /* is null */
 } else {
-var91 = 1; /* arg is null and recv is not */
+var81 = 1; /* arg is null and recv is not */
 }
 if (0) {
-{ /* Inline kernel#Object#!= (var_next,var90) on <var_next:nullable HashNode[nullable Object]> */
-var_other = var90;
+{ /* Inline kernel#Object#!= (var_next,((val*)NULL)) on <var_next:nullable HashNode[nullable Object]> */
+var_other = ((val*)NULL);
 {
-var94 = ((short int (*)(val* self, val* p0))(var_next->class->vft[COLOR_standard__kernel__Object___61d_61d]))(var_next, var_other) /* == on <var_next:nullable HashNode[nullable Object](HashNode[nullable Object])>*/;
+var84 = ((short int(*)(val* self, val* p0))(var_next->class->vft[COLOR_standard__kernel__Object___61d_61d]))(var_next, var_other); /* == on <var_next:nullable HashNode[nullable Object](HashNode[nullable Object])>*/
 }
-var95 = !var94;
-var92 = var95;
-goto RET_LABEL93;
-RET_LABEL93:(void)0;
+var85 = !var84;
+var82 = var85;
+goto RET_LABEL83;
+RET_LABEL83:(void)0;
 }
-var91 = var92;
+var81 = var82;
 }
-if (var91){
+if (var81){
 var_next->attrs[COLOR_standard__hash_collection__HashNode___prev_in_bucklet].val = var_node; /* _prev_in_bucklet on <var_next:nullable HashNode[nullable Object](HashNode[nullable Object])> */
 } else {
 }
-var96 = var_node->attrs[COLOR_standard__hash_collection__HashNode___next_item].val; /* _next_item on <var_node:nullable HashNode[nullable Object](HashNode[nullable Object])> */
-/* <var96:nullable HashNode[nullable Object]> isa nullable N */
-type_struct100 = self->type->resolution_table->types[COLOR_nullable__standard__hash_collection__HashCollection__N];
-cltype98 = type_struct100->color;
-idtype99 = type_struct100->id;
-if(var96 == NULL) {
-var97 = 1;
+var86 = var_node->attrs[COLOR_standard__hash_collection__HashNode___next_item].val; /* _next_item on <var_node:nullable HashNode[nullable Object](HashNode[nullable Object])> */
+/* <var86:nullable HashNode[nullable Object]> isa nullable N */
+type_struct90 = self->type->resolution_table->types[COLOR_nullable__standard__hash_collection__HashCollection__N];
+cltype88 = type_struct90->color;
+idtype89 = type_struct90->id;
+if(var86 == NULL) {
+var87 = 1;
 } else {
-if(cltype98 >= var96->type->table_size) {
-var97 = 0;
+if(cltype88 >= var86->type->table_size) {
+var87 = 0;
 } else {
-var97 = var96->type->type_table[cltype98] == idtype99;
+var87 = var86->type->type_table[cltype88] == idtype89;
 }
 }
-if (unlikely(!var97)) {
-var_class_name101 = var96 == NULL ? "null" : var96->type->name;
-PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "nullable N", var_class_name101);
+if (unlikely(!var87)) {
+var_class_name91 = var86 == NULL ? "null" : var86->type->name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "nullable N", var_class_name91);
 PRINT_ERROR(" (%s:%d)\n", FILE_standard__hash_collection, 195);
-show_backtrace(1);
+fatal_exit(1);
 }
-var_node = var96;
+var_node = var86;
 } else {
-goto BREAK_label102;
+goto BREAK_label92;
 }
 }
-BREAK_label102: (void)0;
+BREAK_label92: (void)0;
 RET_LABEL:;
 }
 /* method hash_collection#HashNode#key= for (self: HashNode[nullable Object], nullable Object) */
@@ -1627,17 +1437,17 @@ is_nullable = type_struct->is_nullable;
 if(p0 == NULL) {
 var = is_nullable;
 } else {
-if(cltype >= p0->type->table_size) {
+if(cltype >= (((long)p0&3)?type_info[((long)p0&3)]:p0->type)->table_size) {
 var = 0;
 } else {
-var = p0->type->type_table[cltype] == idtype;
+var = (((long)p0&3)?type_info[((long)p0&3)]:p0->type)->type_table[cltype] == idtype;
 }
 }
 if (unlikely(!var)) {
-var_class_name = p0 == NULL ? "null" : p0->type->name;
+var_class_name = p0 == NULL ? "null" : (((long)p0&3)?type_info[((long)p0&3)]:p0->type)->name;
 PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "K", var_class_name);
 PRINT_ERROR(" (%s:%d)\n", FILE_standard__hash_collection, 201);
-show_backtrace(1);
+fatal_exit(1);
 }
 self->attrs[COLOR_standard__hash_collection__HashNode___key].val = p0; /* _key on <self:HashNode[nullable Object]> */
 RET_LABEL:;
@@ -1645,88 +1455,59 @@ RET_LABEL:;
 /* method hash_collection#HashNode#init for (self: HashNode[nullable Object]) */
 void standard__hash_collection___standard__hash_collection__HashNode___standard__kernel__Object__init(val* self) {
 {
-((void (*)(val* self))(self->class->vft[COLOR_standard__hash_collection___standard__hash_collection__HashNode___standard__kernel__Object__init]))(self) /* init on <self:HashNode[nullable Object]>*/;
+((void(*)(val* self))(self->class->vft[COLOR_standard__hash_collection___standard__hash_collection__HashNode___standard__kernel__Object__init]))(self); /* init on <self:HashNode[nullable Object]>*/
 }
 RET_LABEL:;
 }
 /* method hash_collection#HashMap#[] for (self: HashMap[nullable Object, nullable Object], nullable Object): nullable Object */
 val* standard___standard__HashMap___standard__abstract_collection__MapRead___91d_93d(val* self, val* p0) {
 val* var /* : nullable Object */;
-short int var1 /* : Bool */;
-int cltype;
-int idtype;
-const struct type* type_struct;
-short int is_nullable;
-const char* var_class_name;
 val* var_key /* var key: nullable Object */;
-val* var2 /* : nullable HashNode[nullable Object] */;
+val* var1 /* : nullable HashNode[nullable Object] */;
 val* var_c /* var c: nullable HashMapNode[nullable Object, nullable Object] */;
-val* var3 /* : null */;
-short int var4 /* : Bool */;
-short int var5 /* : Bool */;
+short int var2 /* : Bool */;
+short int var3 /* : Bool */;
 val* var_other /* var other: nullable Object */;
+short int var5 /* : Bool */;
 short int var7 /* : Bool */;
-short int var9 /* : Bool */;
-val* var10 /* : nullable Object */;
-val* var11 /* : nullable Object */;
-/* Covariant cast for argument 0 (key) <p0:nullable Object> isa K */
-/* <p0:nullable Object> isa K */
-type_struct = self->type->resolution_table->types[COLOR_standard__HashMap___35dK];
-cltype = type_struct->color;
-idtype = type_struct->id;
-is_nullable = type_struct->is_nullable;
-if(p0 == NULL) {
-var1 = is_nullable;
-} else {
-if(cltype >= p0->type->table_size) {
-var1 = 0;
-} else {
-var1 = p0->type->type_table[cltype] == idtype;
-}
-}
-if (unlikely(!var1)) {
-var_class_name = p0 == NULL ? "null" : p0->type->name;
-PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "K", var_class_name);
-PRINT_ERROR(" (%s:%d)\n", FILE_standard__hash_collection, 228);
-show_backtrace(1);
-}
+val* var8 /* : nullable Object */;
+val* var9 /* : nullable Object */;
 var_key = p0;
 {
-var2 = standard__hash_collection___standard__hash_collection__HashCollection___node_at(self, var_key);
+var1 = standard__hash_collection___standard__hash_collection__HashCollection___node_at(self, var_key);
 }
-var_c = var2;
-var3 = NULL;
+var_c = var1;
 if (var_c == NULL) {
-var4 = 1; /* is null */
+var2 = 1; /* is null */
 } else {
-var4 = 0; /* arg is null but recv is not */
+var2 = 0; /* arg is null but recv is not */
 }
 if (0) {
-{ /* Inline kernel#Object#== (var_c,var3) on <var_c:nullable HashMapNode[nullable Object, nullable Object]> */
-var_other = var3;
+{ /* Inline kernel#Object#== (var_c,((val*)NULL)) on <var_c:nullable HashMapNode[nullable Object, nullable Object]> */
+var_other = ((val*)NULL);
 {
 { /* Inline kernel#Object#is_same_instance (var_c,var_other) on <var_c:nullable HashMapNode[nullable Object, nullable Object](HashMapNode[nullable Object, nullable Object])> */
-var9 = var_c == var_other;
-var7 = var9;
-goto RET_LABEL8;
-RET_LABEL8:(void)0;
-}
-}
+var7 = var_c == var_other;
 var5 = var7;
 goto RET_LABEL6;
 RET_LABEL6:(void)0;
 }
-var4 = var5;
 }
-if (var4){
+var3 = var5;
+goto RET_LABEL4;
+RET_LABEL4:(void)0;
+}
+var2 = var3;
+}
+if (var2){
 {
-var10 = ((val* (*)(val* self, val* p0))(self->class->vft[COLOR_standard__abstract_collection__MapRead__provide_default_value]))(self, var_key) /* provide_default_value on <self:HashMap[nullable Object, nullable Object]>*/;
+var8 = ((val*(*)(val* self, val* p0))(self->class->vft[COLOR_standard__abstract_collection__MapRead__provide_default_value]))(self, var_key); /* provide_default_value on <self:HashMap[nullable Object, nullable Object]>*/
 }
-var = var10;
+var = var8;
 goto RET_LABEL;
 } else {
-var11 = var_c->attrs[COLOR_standard__hash_collection__HashMapNode___value].val; /* _value on <var_c:nullable HashMapNode[nullable Object, nullable Object](HashMapNode[nullable Object, nullable Object])> */
-var = var11;
+var9 = var_c->attrs[COLOR_standard__hash_collection__HashMapNode___value].val; /* _value on <var_c:nullable HashMapNode[nullable Object, nullable Object](HashMapNode[nullable Object, nullable Object])> */
+var = var9;
 goto RET_LABEL;
 }
 RET_LABEL:;
@@ -1735,79 +1516,48 @@ return var;
 /* method hash_collection#HashMap#get_or_null for (self: HashMap[nullable Object, nullable Object], nullable Object): nullable Object */
 val* standard___standard__HashMap___standard__abstract_collection__MapRead__get_or_null(val* self, val* p0) {
 val* var /* : nullable Object */;
-short int var1 /* : Bool */;
-int cltype;
-int idtype;
-const struct type* type_struct;
-short int is_nullable;
-const char* var_class_name;
 val* var_key /* var key: nullable Object */;
-val* var2 /* : nullable HashNode[nullable Object] */;
+val* var1 /* : nullable HashNode[nullable Object] */;
 val* var_c /* var c: nullable HashMapNode[nullable Object, nullable Object] */;
-val* var3 /* : null */;
-short int var4 /* : Bool */;
-short int var5 /* : Bool */;
+short int var2 /* : Bool */;
+short int var3 /* : Bool */;
 val* var_other /* var other: nullable Object */;
+short int var5 /* : Bool */;
 short int var7 /* : Bool */;
-short int var9 /* : Bool */;
-val* var10 /* : null */;
-val* var11 /* : nullable Object */;
-/* Covariant cast for argument 0 (key) <p0:nullable Object> isa K */
-/* <p0:nullable Object> isa K */
-type_struct = self->type->resolution_table->types[COLOR_standard__HashMap___35dK];
-cltype = type_struct->color;
-idtype = type_struct->id;
-is_nullable = type_struct->is_nullable;
-if(p0 == NULL) {
-var1 = is_nullable;
-} else {
-if(cltype >= p0->type->table_size) {
-var1 = 0;
-} else {
-var1 = p0->type->type_table[cltype] == idtype;
-}
-}
-if (unlikely(!var1)) {
-var_class_name = p0 == NULL ? "null" : p0->type->name;
-PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "K", var_class_name);
-PRINT_ERROR(" (%s:%d)\n", FILE_standard__hash_collection, 238);
-show_backtrace(1);
-}
+val* var8 /* : nullable Object */;
 var_key = p0;
 {
-var2 = standard__hash_collection___standard__hash_collection__HashCollection___node_at(self, var_key);
+var1 = standard__hash_collection___standard__hash_collection__HashCollection___node_at(self, var_key);
 }
-var_c = var2;
-var3 = NULL;
+var_c = var1;
 if (var_c == NULL) {
-var4 = 1; /* is null */
+var2 = 1; /* is null */
 } else {
-var4 = 0; /* arg is null but recv is not */
+var2 = 0; /* arg is null but recv is not */
 }
 if (0) {
-{ /* Inline kernel#Object#== (var_c,var3) on <var_c:nullable HashMapNode[nullable Object, nullable Object]> */
-var_other = var3;
+{ /* Inline kernel#Object#== (var_c,((val*)NULL)) on <var_c:nullable HashMapNode[nullable Object, nullable Object]> */
+var_other = ((val*)NULL);
 {
 { /* Inline kernel#Object#is_same_instance (var_c,var_other) on <var_c:nullable HashMapNode[nullable Object, nullable Object](HashMapNode[nullable Object, nullable Object])> */
-var9 = var_c == var_other;
-var7 = var9;
-goto RET_LABEL8;
-RET_LABEL8:(void)0;
-}
-}
+var7 = var_c == var_other;
 var5 = var7;
 goto RET_LABEL6;
 RET_LABEL6:(void)0;
 }
-var4 = var5;
 }
-if (var4){
-var10 = NULL;
-var = var10;
+var3 = var5;
+goto RET_LABEL4;
+RET_LABEL4:(void)0;
+}
+var2 = var3;
+}
+if (var2){
+var = ((val*)NULL);
 goto RET_LABEL;
 } else {
-var11 = var_c->attrs[COLOR_standard__hash_collection__HashMapNode___value].val; /* _value on <var_c:nullable HashMapNode[nullable Object, nullable Object](HashMapNode[nullable Object, nullable Object])> */
-var = var11;
+var8 = var_c->attrs[COLOR_standard__hash_collection__HashMapNode___value].val; /* _value on <var_c:nullable HashMapNode[nullable Object, nullable Object](HashMapNode[nullable Object, nullable Object])> */
+var = var8;
 goto RET_LABEL;
 }
 RET_LABEL:;
@@ -1819,10 +1569,10 @@ val* var /* : HashMapIterator[nullable Object, nullable Object] */;
 val* var1 /* : HashMapIterator[nullable Object, nullable Object] */;
 var1 = NEW_standard__HashMapIterator(self->type->resolution_table->types[COLOR_standard__HashMapIterator__standard__HashMap___35dK__standard__HashMap___35dV]);
 {
-((void (*)(val* self, val* p0))(var1->class->vft[COLOR_standard__hash_collection__HashMapIterator__map_61d]))(var1, self) /* map= on <var1:HashMapIterator[nullable Object, nullable Object]>*/;
+((void(*)(val* self, val* p0))(var1->class->vft[COLOR_standard__hash_collection__HashMapIterator__map_61d]))(var1, self); /* map= on <var1:HashMapIterator[nullable Object, nullable Object]>*/
 }
 {
-((void (*)(val* self))(var1->class->vft[COLOR_standard__kernel__Object__init]))(var1) /* init on <var1:HashMapIterator[nullable Object, nullable Object]>*/;
+((void(*)(val* self))(var1->class->vft[COLOR_standard__kernel__Object__init]))(var1); /* init on <var1:HashMapIterator[nullable Object, nullable Object]>*/
 }
 var = var1;
 goto RET_LABEL;
@@ -1843,20 +1593,18 @@ return var;
 short int standard___standard__HashMap___standard__abstract_collection__MapRead__is_empty(val* self) {
 short int var /* : Bool */;
 long var1 /* : Int */;
-long var2 /* : Int */;
-short int var3 /* : Bool */;
-short int var5 /* : Bool */;
+short int var2 /* : Bool */;
+short int var4 /* : Bool */;
 var1 = self->attrs[COLOR_standard__hash_collection__HashCollection___the_length].l; /* _the_length on <self:HashMap[nullable Object, nullable Object]> */
-var2 = 0;
 {
-{ /* Inline kernel#Int#== (var1,var2) on <var1:Int> */
-var5 = var1 == var2;
-var3 = var5;
-goto RET_LABEL4;
-RET_LABEL4:(void)0;
+{ /* Inline kernel#Int#== (var1,0l) on <var1:Int> */
+var4 = var1 == 0l;
+var2 = var4;
+goto RET_LABEL3;
+RET_LABEL3:(void)0;
 }
 }
-var = var3;
+var = var2;
 goto RET_LABEL;
 RET_LABEL:;
 return var;
@@ -1881,13 +1629,12 @@ long var7 /* : Int */;
 long var_i /* var i: Int */;
 val* var8 /* : nullable HashNode[nullable Object] */;
 val* var_c /* var c: nullable HashMapNode[nullable Object, nullable Object] */;
-val* var9 /* : null */;
+short int var9 /* : Bool */;
 short int var10 /* : Bool */;
-short int var11 /* : Bool */;
 val* var_other /* var other: nullable Object */;
+short int var12 /* : Bool */;
 short int var13 /* : Bool */;
-short int var14 /* : Bool */;
-val* var15 /* : HashMapNode[nullable Object, nullable Object] */;
+val* var14 /* : HashMapNode[nullable Object, nullable Object] */;
 /* Covariant cast for argument 0 (key) <p0:nullable Object> isa K */
 /* <p0:nullable Object> isa K */
 type_struct = self->type->resolution_table->types[COLOR_standard__HashMap___35dK];
@@ -1897,17 +1644,17 @@ is_nullable = type_struct->is_nullable;
 if(p0 == NULL) {
 var = is_nullable;
 } else {
-if(cltype >= p0->type->table_size) {
+if(cltype >= (((long)p0&3)?type_info[((long)p0&3)]:p0->type)->table_size) {
 var = 0;
 } else {
-var = p0->type->type_table[cltype] == idtype;
+var = (((long)p0&3)?type_info[((long)p0&3)]:p0->type)->type_table[cltype] == idtype;
 }
 }
 if (unlikely(!var)) {
-var_class_name = p0 == NULL ? "null" : p0->type->name;
+var_class_name = p0 == NULL ? "null" : (((long)p0&3)?type_info[((long)p0&3)]:p0->type)->name;
 PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "K", var_class_name);
 PRINT_ERROR(" (%s:%d)\n", FILE_standard__hash_collection, 254);
-show_backtrace(1);
+fatal_exit(1);
 }
 /* Covariant cast for argument 1 (v) <p1:nullable Object> isa V */
 /* <p1:nullable Object> isa V */
@@ -1918,17 +1665,17 @@ is_nullable5 = type_struct4->is_nullable;
 if(p1 == NULL) {
 var1 = is_nullable5;
 } else {
-if(cltype2 >= p1->type->table_size) {
+if(cltype2 >= (((long)p1&3)?type_info[((long)p1&3)]:p1->type)->table_size) {
 var1 = 0;
 } else {
-var1 = p1->type->type_table[cltype2] == idtype3;
+var1 = (((long)p1&3)?type_info[((long)p1&3)]:p1->type)->type_table[cltype2] == idtype3;
 }
 }
 if (unlikely(!var1)) {
-var_class_name6 = p1 == NULL ? "null" : p1->type->name;
+var_class_name6 = p1 == NULL ? "null" : (((long)p1&3)?type_info[((long)p1&3)]:p1->type)->name;
 PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "V", var_class_name6);
 PRINT_ERROR(" (%s:%d)\n", FILE_standard__hash_collection, 254);
-show_backtrace(1);
+fatal_exit(1);
 }
 var_key = p0;
 var_v = p1;
@@ -1940,41 +1687,40 @@ var_i = var7;
 var8 = standard__hash_collection___standard__hash_collection__HashCollection___node_at_idx(self, var_i, var_key);
 }
 var_c = var8;
-var9 = NULL;
 if (var_c == NULL) {
-var10 = 0; /* is null */
+var9 = 0; /* is null */
 } else {
-var10 = 1; /* arg is null and recv is not */
+var9 = 1; /* arg is null and recv is not */
 }
 if (0) {
-{ /* Inline kernel#Object#!= (var_c,var9) on <var_c:nullable HashMapNode[nullable Object, nullable Object]> */
-var_other = var9;
+{ /* Inline kernel#Object#!= (var_c,((val*)NULL)) on <var_c:nullable HashMapNode[nullable Object, nullable Object]> */
+var_other = ((val*)NULL);
 {
-var13 = ((short int (*)(val* self, val* p0))(var_c->class->vft[COLOR_standard__kernel__Object___61d_61d]))(var_c, var_other) /* == on <var_c:nullable HashMapNode[nullable Object, nullable Object](HashMapNode[nullable Object, nullable Object])>*/;
+var12 = ((short int(*)(val* self, val* p0))(var_c->class->vft[COLOR_standard__kernel__Object___61d_61d]))(var_c, var_other); /* == on <var_c:nullable HashMapNode[nullable Object, nullable Object](HashMapNode[nullable Object, nullable Object])>*/
 }
-var14 = !var13;
-var11 = var14;
-goto RET_LABEL12;
-RET_LABEL12:(void)0;
+var13 = !var12;
+var10 = var13;
+goto RET_LABEL11;
+RET_LABEL11:(void)0;
 }
-var10 = var11;
+var9 = var10;
 }
-if (var10){
+if (var9){
 var_c->attrs[COLOR_standard__hash_collection__HashNode___key].val = var_key; /* _key on <var_c:nullable HashMapNode[nullable Object, nullable Object](HashMapNode[nullable Object, nullable Object])> */
 var_c->attrs[COLOR_standard__hash_collection__HashMapNode___value].val = var_v; /* _value on <var_c:nullable HashMapNode[nullable Object, nullable Object](HashMapNode[nullable Object, nullable Object])> */
 } else {
-var15 = NEW_standard__hash_collection__HashMapNode(self->type->resolution_table->types[COLOR_standard__hash_collection__HashMapNode__standard__HashMap___35dK__standard__HashMap___35dV]);
+var14 = NEW_standard__hash_collection__HashMapNode(self->type->resolution_table->types[COLOR_standard__hash_collection__HashMapNode__standard__HashMap___35dK__standard__HashMap___35dV]);
 {
-((void (*)(val* self, val* p0))(var15->class->vft[COLOR_standard__hash_collection__HashNode__key_61d]))(var15, var_key) /* key= on <var15:HashMapNode[nullable Object, nullable Object]>*/;
+((void(*)(val* self, val* p0))(var14->class->vft[COLOR_standard__hash_collection__HashNode__key_61d]))(var14, var_key); /* key= on <var14:HashMapNode[nullable Object, nullable Object]>*/
 }
 {
-((void (*)(val* self, val* p0))(var15->class->vft[COLOR_standard__hash_collection__HashMapNode__value_61d]))(var15, var_v) /* value= on <var15:HashMapNode[nullable Object, nullable Object]>*/;
+((void(*)(val* self, val* p0))(var14->class->vft[COLOR_standard__hash_collection__HashMapNode__value_61d]))(var14, var_v); /* value= on <var14:HashMapNode[nullable Object, nullable Object]>*/
 }
 {
-((void (*)(val* self))(var15->class->vft[COLOR_standard__kernel__Object__init]))(var15) /* init on <var15:HashMapNode[nullable Object, nullable Object]>*/;
+((void(*)(val* self))(var14->class->vft[COLOR_standard__kernel__Object__init]))(var14); /* init on <var14:HashMapNode[nullable Object, nullable Object]>*/
 }
 {
-standard__hash_collection___standard__hash_collection__HashCollection___store(self, var_i, var15); /* Direct call hash_collection#HashCollection#store on <self:HashMap[nullable Object, nullable Object]>*/
+standard__hash_collection___standard__hash_collection__HashCollection___store(self, var_i, var14); /* Direct call hash_collection#HashCollection#store on <self:HashMap[nullable Object, nullable Object]>*/
 }
 }
 RET_LABEL:;
@@ -1988,47 +1734,108 @@ RET_LABEL:;
 }
 /* method hash_collection#HashMap#init for (self: HashMap[nullable Object, nullable Object]) */
 void standard___standard__HashMap___standard__kernel__Object__init(val* self) {
-long var /* : Int */;
-long var1 /* : Int */;
-long var2 /* : Int */;
 {
-((void (*)(val* self))(self->class->vft[COLOR_standard___standard__HashMap___standard__kernel__Object__init]))(self) /* init on <self:HashMap[nullable Object, nullable Object]>*/;
+((void(*)(val* self))(self->class->vft[COLOR_standard___standard__HashMap___standard__kernel__Object__init]))(self); /* init on <self:HashMap[nullable Object, nullable Object]>*/
 }
-var = 0;
-self->attrs[COLOR_standard__hash_collection__HashCollection___capacity].l = var; /* _capacity on <self:HashMap[nullable Object, nullable Object]> */
-var1 = 0;
-self->attrs[COLOR_standard__hash_collection__HashCollection___the_length].l = var1; /* _the_length on <self:HashMap[nullable Object, nullable Object]> */
-var2 = 0;
+self->attrs[COLOR_standard__hash_collection__HashCollection___capacity].l = 0l; /* _capacity on <self:HashMap[nullable Object, nullable Object]> */
+self->attrs[COLOR_standard__hash_collection__HashCollection___the_length].l = 0l; /* _the_length on <self:HashMap[nullable Object, nullable Object]> */
 {
-standard__hash_collection___standard__hash_collection__HashCollection___enlarge(self, var2); /* Direct call hash_collection#HashCollection#enlarge on <self:HashMap[nullable Object, nullable Object]>*/
+standard__hash_collection___standard__hash_collection__HashCollection___enlarge(self, 0l); /* Direct call hash_collection#HashCollection#enlarge on <self:HashMap[nullable Object, nullable Object]>*/
 }
 RET_LABEL:;
 }
 /* method hash_collection#HashMap#keys for (self: HashMap[nullable Object, nullable Object]): RemovableCollection[nullable Object] */
 val* standard___standard__HashMap___standard__abstract_collection__MapRead__keys(val* self) {
 val* var /* : RemovableCollection[nullable Object] */;
-val* var1 /* : RemovableCollection[nullable Object] */;
-var1 = self->attrs[COLOR_standard__hash_collection__HashMap___keys].val; /* _keys on <self:HashMap[nullable Object, nullable Object]> */
-if (unlikely(var1 == NULL)) {
+short int var1 /* : Bool */;
+val* var2 /* : RemovableCollection[nullable Object] */;
+val* var3 /* : HashMapKeys[nullable Object, nullable Object] */;
+var1 = self->attrs[COLOR_standard__hash_collection__HashMap___keys].val != NULL; /* _keys on <self:HashMap[nullable Object, nullable Object]> */
+if(likely(var1)) {
+var2 = self->attrs[COLOR_standard__hash_collection__HashMap___keys].val; /* _keys on <self:HashMap[nullable Object, nullable Object]> */
+if (unlikely(var2 == NULL)) {
 PRINT_ERROR("Runtime error: %s", "Uninitialized attribute _keys");
 PRINT_ERROR(" (%s:%d)\n", FILE_standard__hash_collection, 275);
-show_backtrace(1);
+fatal_exit(1);
 }
-var = var1;
+} else {
+var3 = NEW_standard__hash_collection__HashMapKeys(self->type->resolution_table->types[COLOR_standard__hash_collection__HashMapKeys__standard__HashMap___35dK__standard__HashMap___35dV]);
+{
+((void(*)(val* self, val* p0))(var3->class->vft[COLOR_standard__hash_collection__HashMapKeys__map_61d]))(var3, self); /* map= on <var3:HashMapKeys[nullable Object, nullable Object]>*/
+}
+{
+((void(*)(val* self))(var3->class->vft[COLOR_standard__kernel__Object__init]))(var3); /* init on <var3:HashMapKeys[nullable Object, nullable Object]>*/
+}
+self->attrs[COLOR_standard__hash_collection__HashMap___keys].val = var3; /* _keys on <self:HashMap[nullable Object, nullable Object]> */
+var2 = var3;
+}
+var = var2;
 RET_LABEL:;
 return var;
 }
 /* method hash_collection#HashMap#values for (self: HashMap[nullable Object, nullable Object]): RemovableCollection[nullable Object] */
 val* standard___standard__HashMap___standard__abstract_collection__MapRead__values(val* self) {
 val* var /* : RemovableCollection[nullable Object] */;
-val* var1 /* : RemovableCollection[nullable Object] */;
-var1 = self->attrs[COLOR_standard__hash_collection__HashMap___values].val; /* _values on <self:HashMap[nullable Object, nullable Object]> */
-if (unlikely(var1 == NULL)) {
+short int var1 /* : Bool */;
+val* var2 /* : RemovableCollection[nullable Object] */;
+val* var3 /* : HashMapValues[nullable Object, nullable Object] */;
+var1 = self->attrs[COLOR_standard__hash_collection__HashMap___values].val != NULL; /* _values on <self:HashMap[nullable Object, nullable Object]> */
+if(likely(var1)) {
+var2 = self->attrs[COLOR_standard__hash_collection__HashMap___values].val; /* _values on <self:HashMap[nullable Object, nullable Object]> */
+if (unlikely(var2 == NULL)) {
 PRINT_ERROR("Runtime error: %s", "Uninitialized attribute _values");
 PRINT_ERROR(" (%s:%d)\n", FILE_standard__hash_collection, 276);
-show_backtrace(1);
+fatal_exit(1);
 }
-var = var1;
+} else {
+var3 = NEW_standard__hash_collection__HashMapValues(self->type->resolution_table->types[COLOR_standard__hash_collection__HashMapValues__standard__HashMap___35dK__standard__HashMap___35dV]);
+{
+((void(*)(val* self, val* p0))(var3->class->vft[COLOR_standard__hash_collection__HashMapValues__map_61d]))(var3, self); /* map= on <var3:HashMapValues[nullable Object, nullable Object]>*/
+}
+{
+((void(*)(val* self))(var3->class->vft[COLOR_standard__kernel__Object__init]))(var3); /* init on <var3:HashMapValues[nullable Object, nullable Object]>*/
+}
+self->attrs[COLOR_standard__hash_collection__HashMap___values].val = var3; /* _values on <self:HashMap[nullable Object, nullable Object]> */
+var2 = var3;
+}
+var = var2;
+RET_LABEL:;
+return var;
+}
+/* method hash_collection#HashMap#has_key for (self: HashMap[nullable Object, nullable Object], nullable Object): Bool */
+short int standard___standard__HashMap___standard__abstract_collection__MapRead__has_key(val* self, val* p0) {
+short int var /* : Bool */;
+val* var_k /* var k: nullable Object */;
+val* var1 /* : nullable HashNode[nullable Object] */;
+short int var2 /* : Bool */;
+short int var3 /* : Bool */;
+val* var_other /* var other: nullable Object */;
+short int var5 /* : Bool */;
+short int var6 /* : Bool */;
+var_k = p0;
+{
+var1 = standard__hash_collection___standard__hash_collection__HashCollection___node_at(self, var_k);
+}
+if (var1 == NULL) {
+var2 = 0; /* is null */
+} else {
+var2 = 1; /* arg is null and recv is not */
+}
+if (0) {
+{ /* Inline kernel#Object#!= (var1,((val*)NULL)) on <var1:nullable HashNode[nullable Object](nullable HashMapNode[nullable Object, nullable Object])> */
+var_other = ((val*)NULL);
+{
+var5 = ((short int(*)(val* self, val* p0))(var1->class->vft[COLOR_standard__kernel__Object___61d_61d]))(var1, var_other); /* == on <var1:nullable HashMapNode[nullable Object, nullable Object](HashMapNode[nullable Object, nullable Object])>*/
+}
+var6 = !var5;
+var3 = var6;
+goto RET_LABEL4;
+RET_LABEL4:(void)0;
+}
+var2 = var3;
+}
+var = var2;
+goto RET_LABEL;
 RET_LABEL:;
 return var;
 }
@@ -2039,8 +1846,8 @@ val* var1 /* : HashMap[nullable Object, nullable Object] */;
 var1 = self->attrs[COLOR_standard__hash_collection__HashMapKeys___map].val; /* _map on <self:HashMapKeys[nullable Object, nullable Object]> */
 if (unlikely(var1 == NULL)) {
 PRINT_ERROR("Runtime error: %s", "Uninitialized attribute _map");
-PRINT_ERROR(" (%s:%d)\n", FILE_standard__hash_collection, 282);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_standard__hash_collection, 283);
+fatal_exit(1);
 }
 var = var1;
 RET_LABEL:;
@@ -2066,8 +1873,8 @@ var = p0->type->type_table[cltype] == idtype;
 if (unlikely(!var)) {
 var_class_name = p0 == NULL ? "null" : p0->type->name;
 PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "HashMap[K, V]", var_class_name);
-PRINT_ERROR(" (%s:%d)\n", FILE_standard__hash_collection, 282);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_standard__hash_collection, 283);
+fatal_exit(1);
 }
 self->attrs[COLOR_standard__hash_collection__HashMapKeys___map].val = p0; /* _map on <self:HashMapKeys[nullable Object, nullable Object]> */
 RET_LABEL:;
@@ -2084,8 +1891,8 @@ val* var5 /* : nullable Object */;
 var3 = self->attrs[COLOR_standard__hash_collection__HashMapKeys___map].val; /* _map on <self:HashMapKeys[nullable Object, nullable Object]> */
 if (unlikely(var3 == NULL)) {
 PRINT_ERROR("Runtime error: %s", "Uninitialized attribute _map");
-PRINT_ERROR(" (%s:%d)\n", FILE_standard__hash_collection, 282);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_standard__hash_collection, 283);
+fatal_exit(1);
 }
 var1 = var3;
 RET_LABEL2:(void)0;
@@ -2094,8 +1901,8 @@ RET_LABEL2:(void)0;
 var4 = var1->attrs[COLOR_standard__hash_collection__HashCollection___first_item].val; /* _first_item on <var1:HashMap[nullable Object, nullable Object]> */
 if (unlikely(var4 == NULL)) {
 PRINT_ERROR("Runtime error: %s", "Receiver is null");
-PRINT_ERROR(" (%s:%d)\n", FILE_standard__hash_collection, 286);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_standard__hash_collection, 287);
+fatal_exit(1);
 }
 var5 = var4->attrs[COLOR_standard__hash_collection__HashNode___key].val; /* _key on <var4:nullable HashNode[nullable Object](nullable HashMapNode[nullable Object, nullable Object])> */
 var = var5;
@@ -2106,79 +1913,50 @@ return var;
 /* method hash_collection#HashMapKeys#has for (self: HashMapKeys[nullable Object, nullable Object], nullable Object): Bool */
 short int standard__hash_collection___standard__hash_collection__HashMapKeys___standard__abstract_collection__Collection__has(val* self, val* p0) {
 short int var /* : Bool */;
-short int var1 /* : Bool */;
-int cltype;
-int idtype;
-const struct type* type_struct;
-short int is_nullable;
-const char* var_class_name;
 val* var_k /* var k: nullable Object */;
-val* var2 /* : HashMap[nullable Object, nullable Object] */;
-val* var4 /* : HashMap[nullable Object, nullable Object] */;
-val* var5 /* : nullable HashNode[nullable Object] */;
-val* var6 /* : null */;
-short int var7 /* : Bool */;
-short int var8 /* : Bool */;
+val* var1 /* : HashMap[nullable Object, nullable Object] */;
+val* var3 /* : HashMap[nullable Object, nullable Object] */;
+val* var4 /* : nullable HashNode[nullable Object] */;
+short int var5 /* : Bool */;
+short int var6 /* : Bool */;
 val* var_other /* var other: nullable Object */;
-short int var10 /* : Bool */;
-short int var11 /* : Bool */;
-/* Covariant cast for argument 0 (k) <p0:nullable Object> isa K */
-/* <p0:nullable Object> isa K */
-type_struct = self->type->resolution_table->types[COLOR_standard__hash_collection__HashMapKeys___35dK];
-cltype = type_struct->color;
-idtype = type_struct->id;
-is_nullable = type_struct->is_nullable;
-if(p0 == NULL) {
-var1 = is_nullable;
-} else {
-if(cltype >= p0->type->table_size) {
-var1 = 0;
-} else {
-var1 = p0->type->type_table[cltype] == idtype;
-}
-}
-if (unlikely(!var1)) {
-var_class_name = p0 == NULL ? "null" : p0->type->name;
-PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "K", var_class_name);
-PRINT_ERROR(" (%s:%d)\n", FILE_standard__hash_collection, 287);
-show_backtrace(1);
-}
+short int var8 /* : Bool */;
+short int var9 /* : Bool */;
 var_k = p0;
 {
 { /* Inline hash_collection#HashMapKeys#map (self) on <self:HashMapKeys[nullable Object, nullable Object]> */
-var4 = self->attrs[COLOR_standard__hash_collection__HashMapKeys___map].val; /* _map on <self:HashMapKeys[nullable Object, nullable Object]> */
-if (unlikely(var4 == NULL)) {
+var3 = self->attrs[COLOR_standard__hash_collection__HashMapKeys___map].val; /* _map on <self:HashMapKeys[nullable Object, nullable Object]> */
+if (unlikely(var3 == NULL)) {
 PRINT_ERROR("Runtime error: %s", "Uninitialized attribute _map");
-PRINT_ERROR(" (%s:%d)\n", FILE_standard__hash_collection, 282);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_standard__hash_collection, 283);
+fatal_exit(1);
 }
-var2 = var4;
-RET_LABEL3:(void)0;
+var1 = var3;
+RET_LABEL2:(void)0;
 }
 }
 {
-var5 = standard__hash_collection___standard__hash_collection__HashCollection___node_at(var2, var_k);
+var4 = standard__hash_collection___standard__hash_collection__HashCollection___node_at(var1, var_k);
 }
-var6 = NULL;
-if (var5 == NULL) {
-var7 = 0; /* is null */
+if (var4 == NULL) {
+var5 = 0; /* is null */
 } else {
-var7 = 1; /* arg is null and recv is not */
+var5 = 1; /* arg is null and recv is not */
 }
 if (0) {
-{ /* Inline kernel#Object#!= (var5,var6) on <var5:nullable HashNode[nullable Object](nullable HashMapNode[nullable Object, nullable Object])> */
-var_other = var6;
+{ /* Inline kernel#Object#!= (var4,((val*)NULL)) on <var4:nullable HashNode[nullable Object](nullable HashMapNode[nullable Object, nullable Object])> */
+var_other = ((val*)NULL);
 {
-var10 = ((short int (*)(val* self, val* p0))(var5->class->vft[COLOR_standard__kernel__Object___61d_61d]))(var5, var_other) /* == on <var5:nullable HashMapNode[nullable Object, nullable Object](HashMapNode[nullable Object, nullable Object])>*/;
+var8 = ((short int(*)(val* self, val* p0))(var4->class->vft[COLOR_standard__kernel__Object___61d_61d]))(var4, var_other); /* == on <var4:nullable HashMapNode[nullable Object, nullable Object](HashMapNode[nullable Object, nullable Object])>*/
 }
-var11 = !var10;
-var8 = var11;
-goto RET_LABEL9;
-RET_LABEL9:(void)0;
+var9 = !var8;
+var6 = var9;
+goto RET_LABEL7;
+RET_LABEL7:(void)0;
 }
-var7 = var8;
+var5 = var6;
 }
-var = var7;
+var = var5;
 goto RET_LABEL;
 RET_LABEL:;
 return var;
@@ -2194,8 +1972,8 @@ short int var4 /* : Bool */;
 var3 = self->attrs[COLOR_standard__hash_collection__HashMapKeys___map].val; /* _map on <self:HashMapKeys[nullable Object, nullable Object]> */
 if (unlikely(var3 == NULL)) {
 PRINT_ERROR("Runtime error: %s", "Uninitialized attribute _map");
-PRINT_ERROR(" (%s:%d)\n", FILE_standard__hash_collection, 282);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_standard__hash_collection, 283);
+fatal_exit(1);
 }
 var1 = var3;
 RET_LABEL2:(void)0;
@@ -2220,8 +1998,8 @@ long var4 /* : Int */;
 var3 = self->attrs[COLOR_standard__hash_collection__HashMapKeys___map].val; /* _map on <self:HashMapKeys[nullable Object, nullable Object]> */
 if (unlikely(var3 == NULL)) {
 PRINT_ERROR("Runtime error: %s", "Uninitialized attribute _map");
-PRINT_ERROR(" (%s:%d)\n", FILE_standard__hash_collection, 282);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_standard__hash_collection, 283);
+fatal_exit(1);
 }
 var1 = var3;
 RET_LABEL2:(void)0;
@@ -2248,8 +2026,8 @@ var1 = NEW_standard__MapKeysIterator(self->type->resolution_table->types[COLOR_s
 var4 = self->attrs[COLOR_standard__hash_collection__HashMapKeys___map].val; /* _map on <self:HashMapKeys[nullable Object, nullable Object]> */
 if (unlikely(var4 == NULL)) {
 PRINT_ERROR("Runtime error: %s", "Uninitialized attribute _map");
-PRINT_ERROR(" (%s:%d)\n", FILE_standard__hash_collection, 282);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_standard__hash_collection, 283);
+fatal_exit(1);
 }
 var2 = var4;
 RET_LABEL3:(void)0;
@@ -2259,10 +2037,10 @@ RET_LABEL3:(void)0;
 var5 = standard___standard__HashMap___standard__abstract_collection__MapRead__iterator(var2);
 }
 {
-((void (*)(val* self, val* p0))(var1->class->vft[COLOR_standard__abstract_collection__MapKeysIterator__original_iterator_61d]))(var1, var5) /* original_iterator= on <var1:MapKeysIterator[nullable Object, nullable Object]>*/;
+((void(*)(val* self, val* p0))(var1->class->vft[COLOR_standard__abstract_collection__MapKeysIterator__original_iterator_61d]))(var1, var5); /* original_iterator= on <var1:MapKeysIterator[nullable Object, nullable Object]>*/
 }
 {
-((void (*)(val* self))(var1->class->vft[COLOR_standard__kernel__Object__init]))(var1) /* init on <var1:MapKeysIterator[nullable Object, nullable Object]>*/;
+((void(*)(val* self))(var1->class->vft[COLOR_standard__kernel__Object__init]))(var1); /* init on <var1:MapKeysIterator[nullable Object, nullable Object]>*/
 }
 var = var1;
 goto RET_LABEL;
@@ -2278,8 +2056,8 @@ val* var2 /* : HashMap[nullable Object, nullable Object] */;
 var2 = self->attrs[COLOR_standard__hash_collection__HashMapKeys___map].val; /* _map on <self:HashMapKeys[nullable Object, nullable Object]> */
 if (unlikely(var2 == NULL)) {
 PRINT_ERROR("Runtime error: %s", "Uninitialized attribute _map");
-PRINT_ERROR(" (%s:%d)\n", FILE_standard__hash_collection, 282);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_standard__hash_collection, 283);
+fatal_exit(1);
 }
 var = var2;
 RET_LABEL1:(void)0;
@@ -2292,58 +2070,31 @@ RET_LABEL:;
 }
 /* method hash_collection#HashMapKeys#remove for (self: HashMapKeys[nullable Object, nullable Object], nullable Object) */
 void standard__hash_collection___standard__hash_collection__HashMapKeys___standard__abstract_collection__RemovableCollection__remove(val* self, val* p0) {
-short int var /* : Bool */;
-int cltype;
-int idtype;
-const struct type* type_struct;
-short int is_nullable;
-const char* var_class_name;
 val* var_key /* var key: nullable Object */;
-val* var1 /* : HashMap[nullable Object, nullable Object] */;
-val* var3 /* : HashMap[nullable Object, nullable Object] */;
-/* Covariant cast for argument 0 (key) <p0:nullable Object> isa K */
-/* <p0:nullable Object> isa K */
-type_struct = self->type->resolution_table->types[COLOR_standard__hash_collection__HashMapKeys___35dK];
-cltype = type_struct->color;
-idtype = type_struct->id;
-is_nullable = type_struct->is_nullable;
-if(p0 == NULL) {
-var = is_nullable;
-} else {
-if(cltype >= p0->type->table_size) {
-var = 0;
-} else {
-var = p0->type->type_table[cltype] == idtype;
-}
-}
-if (unlikely(!var)) {
-var_class_name = p0 == NULL ? "null" : p0->type->name;
-PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "K", var_class_name);
-PRINT_ERROR(" (%s:%d)\n", FILE_standard__hash_collection, 296);
-show_backtrace(1);
-}
+val* var /* : HashMap[nullable Object, nullable Object] */;
+val* var2 /* : HashMap[nullable Object, nullable Object] */;
 var_key = p0;
 {
 { /* Inline hash_collection#HashMapKeys#map (self) on <self:HashMapKeys[nullable Object, nullable Object]> */
-var3 = self->attrs[COLOR_standard__hash_collection__HashMapKeys___map].val; /* _map on <self:HashMapKeys[nullable Object, nullable Object]> */
-if (unlikely(var3 == NULL)) {
+var2 = self->attrs[COLOR_standard__hash_collection__HashMapKeys___map].val; /* _map on <self:HashMapKeys[nullable Object, nullable Object]> */
+if (unlikely(var2 == NULL)) {
 PRINT_ERROR("Runtime error: %s", "Uninitialized attribute _map");
-PRINT_ERROR(" (%s:%d)\n", FILE_standard__hash_collection, 282);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_standard__hash_collection, 283);
+fatal_exit(1);
 }
-var1 = var3;
-RET_LABEL2:(void)0;
+var = var2;
+RET_LABEL1:(void)0;
 }
 }
 {
-standard__hash_collection___standard__hash_collection__HashCollection___remove_node(var1, var_key); /* Direct call hash_collection#HashCollection#remove_node on <var1:HashMap[nullable Object, nullable Object]>*/
+standard__hash_collection___standard__hash_collection__HashCollection___remove_node(var, var_key); /* Direct call hash_collection#HashCollection#remove_node on <var:HashMap[nullable Object, nullable Object]>*/
 }
 RET_LABEL:;
 }
 /* method hash_collection#HashMapKeys#init for (self: HashMapKeys[nullable Object, nullable Object]) */
 void standard__hash_collection___standard__hash_collection__HashMapKeys___standard__kernel__Object__init(val* self) {
 {
-((void (*)(val* self))(self->class->vft[COLOR_standard__hash_collection___standard__hash_collection__HashMapKeys___standard__kernel__Object__init]))(self) /* init on <self:HashMapKeys[nullable Object, nullable Object]>*/;
+((void(*)(val* self))(self->class->vft[COLOR_standard__hash_collection___standard__hash_collection__HashMapKeys___standard__kernel__Object__init]))(self); /* init on <self:HashMapKeys[nullable Object, nullable Object]>*/
 }
 RET_LABEL:;
 }
@@ -2354,8 +2105,8 @@ val* var1 /* : HashMap[nullable Object, nullable Object] */;
 var1 = self->attrs[COLOR_standard__hash_collection__HashMapValues___map].val; /* _map on <self:HashMapValues[nullable Object, nullable Object]> */
 if (unlikely(var1 == NULL)) {
 PRINT_ERROR("Runtime error: %s", "Uninitialized attribute _map");
-PRINT_ERROR(" (%s:%d)\n", FILE_standard__hash_collection, 303);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_standard__hash_collection, 304);
+fatal_exit(1);
 }
 var = var1;
 RET_LABEL:;
@@ -2381,8 +2132,8 @@ var = p0->type->type_table[cltype] == idtype;
 if (unlikely(!var)) {
 var_class_name = p0 == NULL ? "null" : p0->type->name;
 PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "HashMap[K, V]", var_class_name);
-PRINT_ERROR(" (%s:%d)\n", FILE_standard__hash_collection, 303);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_standard__hash_collection, 304);
+fatal_exit(1);
 }
 self->attrs[COLOR_standard__hash_collection__HashMapValues___map].val = p0; /* _map on <self:HashMapValues[nullable Object, nullable Object]> */
 RET_LABEL:;
@@ -2399,8 +2150,8 @@ val* var5 /* : nullable Object */;
 var3 = self->attrs[COLOR_standard__hash_collection__HashMapValues___map].val; /* _map on <self:HashMapValues[nullable Object, nullable Object]> */
 if (unlikely(var3 == NULL)) {
 PRINT_ERROR("Runtime error: %s", "Uninitialized attribute _map");
-PRINT_ERROR(" (%s:%d)\n", FILE_standard__hash_collection, 303);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_standard__hash_collection, 304);
+fatal_exit(1);
 }
 var1 = var3;
 RET_LABEL2:(void)0;
@@ -2409,8 +2160,8 @@ RET_LABEL2:(void)0;
 var4 = var1->attrs[COLOR_standard__hash_collection__HashCollection___first_item].val; /* _first_item on <var1:HashMap[nullable Object, nullable Object]> */
 if (unlikely(var4 == NULL)) {
 PRINT_ERROR("Runtime error: %s", "Receiver is null");
-PRINT_ERROR(" (%s:%d)\n", FILE_standard__hash_collection, 316);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_standard__hash_collection, 317);
+fatal_exit(1);
 }
 var5 = var4->attrs[COLOR_standard__hash_collection__HashMapNode___value].val; /* _value on <var4:nullable HashNode[nullable Object](nullable HashMapNode[nullable Object, nullable Object])> */
 var = var5;
@@ -2421,108 +2172,75 @@ return var;
 /* method hash_collection#HashMapValues#has for (self: HashMapValues[nullable Object, nullable Object], nullable Object): Bool */
 short int standard__hash_collection___standard__hash_collection__HashMapValues___standard__abstract_collection__Collection__has(val* self, val* p0) {
 short int var /* : Bool */;
-short int var1 /* : Bool */;
-int cltype;
-int idtype;
-const struct type* type_struct;
-short int is_nullable;
-const char* var_class_name;
 val* var_item /* var item: nullable Object */;
-val* var2 /* : HashMap[nullable Object, nullable Object] */;
-val* var4 /* : HashMap[nullable Object, nullable Object] */;
-val* var5 /* : nullable HashNode[nullable Object] */;
+val* var1 /* : HashMap[nullable Object, nullable Object] */;
+val* var3 /* : HashMap[nullable Object, nullable Object] */;
+val* var4 /* : nullable HashNode[nullable Object] */;
 val* var_c /* var c: nullable HashMapNode[nullable Object, nullable Object] */;
-val* var6 /* : null */;
-short int var7 /* : Bool */;
-short int var8 /* : Bool */;
+short int var5 /* : Bool */;
+short int var6 /* : Bool */;
 val* var_other /* var other: nullable Object */;
-short int var10 /* : Bool */;
+short int var8 /* : Bool */;
+short int var9 /* : Bool */;
+val* var10 /* : nullable Object */;
 short int var11 /* : Bool */;
-val* var12 /* : nullable Object */;
-short int var13 /* : Bool */;
-short int var14 /* : Bool */;
-short int var15 /* : Bool */;
-val* var16 /* : nullable HashNode[nullable Object] */;
-short int var17 /* : Bool */;
-/* Covariant cast for argument 0 (item) <p0:nullable Object> isa V */
-/* <p0:nullable Object> isa V */
-type_struct = self->type->resolution_table->types[COLOR_standard__hash_collection__HashMapValues___35dV];
-cltype = type_struct->color;
-idtype = type_struct->id;
-is_nullable = type_struct->is_nullable;
-if(p0 == NULL) {
-var1 = is_nullable;
-} else {
-if(cltype >= p0->type->table_size) {
-var1 = 0;
-} else {
-var1 = p0->type->type_table[cltype] == idtype;
-}
-}
-if (unlikely(!var1)) {
-var_class_name = p0 == NULL ? "null" : p0->type->name;
-PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "V", var_class_name);
-PRINT_ERROR(" (%s:%d)\n", FILE_standard__hash_collection, 318);
-show_backtrace(1);
-}
+short int var12 /* : Bool */;
+val* var13 /* : nullable HashNode[nullable Object] */;
 var_item = p0;
 {
-{ /* Inline hash_collection#HashMapValues#map (self) on <self:HashMapValues[nullable Object, nullable Object]> */
-var4 = self->attrs[COLOR_standard__hash_collection__HashMapValues___map].val; /* _map on <self:HashMapValues[nullable Object, nullable Object]> */
-if (unlikely(var4 == NULL)) {
+{ /* Inline hash_collection#HashMapValues#map (self) on <self:HashMapValues[nullable Object, nullable Object]> */
+var3 = self->attrs[COLOR_standard__hash_collection__HashMapValues___map].val; /* _map on <self:HashMapValues[nullable Object, nullable Object]> */
+if (unlikely(var3 == NULL)) {
 PRINT_ERROR("Runtime error: %s", "Uninitialized attribute _map");
-PRINT_ERROR(" (%s:%d)\n", FILE_standard__hash_collection, 303);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_standard__hash_collection, 304);
+fatal_exit(1);
 }
-var2 = var4;
-RET_LABEL3:(void)0;
+var1 = var3;
+RET_LABEL2:(void)0;
 }
 }
-var5 = var2->attrs[COLOR_standard__hash_collection__HashCollection___first_item].val; /* _first_item on <var2:HashMap[nullable Object, nullable Object]> */
-var_c = var5;
+var4 = var1->attrs[COLOR_standard__hash_collection__HashCollection___first_item].val; /* _first_item on <var1:HashMap[nullable Object, nullable Object]> */
+var_c = var4;
 for(;;) {
-var6 = NULL;
 if (var_c == NULL) {
-var7 = 0; /* is null */
+var5 = 0; /* is null */
 } else {
-var7 = 1; /* arg is null and recv is not */
+var5 = 1; /* arg is null and recv is not */
 }
 if (0) {
-{ /* Inline kernel#Object#!= (var_c,var6) on <var_c:nullable HashMapNode[nullable Object, nullable Object]> */
-var_other = var6;
+{ /* Inline kernel#Object#!= (var_c,((val*)NULL)) on <var_c:nullable HashMapNode[nullable Object, nullable Object]> */
+var_other = ((val*)NULL);
 {
-var10 = ((short int (*)(val* self, val* p0))(var_c->class->vft[COLOR_standard__kernel__Object___61d_61d]))(var_c, var_other) /* == on <var_c:nullable HashMapNode[nullable Object, nullable Object](HashMapNode[nullable Object, nullable Object])>*/;
+var8 = ((short int(*)(val* self, val* p0))(var_c->class->vft[COLOR_standard__kernel__Object___61d_61d]))(var_c, var_other); /* == on <var_c:nullable HashMapNode[nullable Object, nullable Object](HashMapNode[nullable Object, nullable Object])>*/
 }
-var11 = !var10;
-var8 = var11;
-goto RET_LABEL9;
-RET_LABEL9:(void)0;
+var9 = !var8;
+var6 = var9;
+goto RET_LABEL7;
+RET_LABEL7:(void)0;
 }
-var7 = var8;
+var5 = var6;
 }
-if (var7){
-var12 = var_c->attrs[COLOR_standard__hash_collection__HashMapNode___value].val; /* _value on <var_c:nullable HashMapNode[nullable Object, nullable Object](HashMapNode[nullable Object, nullable Object])> */
-if (var12 == NULL) {
-var13 = (var_item == NULL);
+if (var5){
+var10 = var_c->attrs[COLOR_standard__hash_collection__HashMapNode___value].val; /* _value on <var_c:nullable HashMapNode[nullable Object, nullable Object](HashMapNode[nullable Object, nullable Object])> */
+if (var10 == NULL) {
+var11 = (var_item == NULL);
 } else {
-var14 = ((short int (*)(val* self, val* p0))(var12->class->vft[COLOR_standard__kernel__Object___61d_61d]))(var12, var_item) /* == on <var12:nullable Object>*/;
-var13 = var14;
+var12 = ((short int(*)(val* self, val* p0))((((long)var10&3)?class_info[((long)var10&3)]:var10->class)->vft[COLOR_standard__kernel__Object___61d_61d]))(var10, var_item); /* == on <var10:nullable Object>*/
+var11 = var12;
 }
-if (var13){
-var15 = 1;
-var = var15;
+if (var11){
+var = 1;
 goto RET_LABEL;
 } else {
 }
-var16 = var_c->attrs[COLOR_standard__hash_collection__HashNode___next_item].val; /* _next_item on <var_c:nullable HashMapNode[nullable Object, nullable Object](HashMapNode[nullable Object, nullable Object])> */
-var_c = var16;
+var13 = var_c->attrs[COLOR_standard__hash_collection__HashNode___next_item].val; /* _next_item on <var_c:nullable HashMapNode[nullable Object, nullable Object](HashMapNode[nullable Object, nullable Object])> */
+var_c = var13;
 } else {
 goto BREAK_label;
 }
 }
 BREAK_label: (void)0;
-var17 = 0;
-var = var17;
+var = 0;
 goto RET_LABEL;
 RET_LABEL:;
 return var;
@@ -2538,8 +2256,8 @@ short int var4 /* : Bool */;
 var3 = self->attrs[COLOR_standard__hash_collection__HashMapValues___map].val; /* _map on <self:HashMapValues[nullable Object, nullable Object]> */
 if (unlikely(var3 == NULL)) {
 PRINT_ERROR("Runtime error: %s", "Uninitialized attribute _map");
-PRINT_ERROR(" (%s:%d)\n", FILE_standard__hash_collection, 303);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_standard__hash_collection, 304);
+fatal_exit(1);
 }
 var1 = var3;
 RET_LABEL2:(void)0;
@@ -2564,8 +2282,8 @@ long var4 /* : Int */;
 var3 = self->attrs[COLOR_standard__hash_collection__HashMapValues___map].val; /* _map on <self:HashMapValues[nullable Object, nullable Object]> */
 if (unlikely(var3 == NULL)) {
 PRINT_ERROR("Runtime error: %s", "Uninitialized attribute _map");
-PRINT_ERROR(" (%s:%d)\n", FILE_standard__hash_collection, 303);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_standard__hash_collection, 304);
+fatal_exit(1);
 }
 var1 = var3;
 RET_LABEL2:(void)0;
@@ -2592,8 +2310,8 @@ var1 = NEW_standard__MapValuesIterator(self->type->resolution_table->types[COLOR
 var4 = self->attrs[COLOR_standard__hash_collection__HashMapValues___map].val; /* _map on <self:HashMapValues[nullable Object, nullable Object]> */
 if (unlikely(var4 == NULL)) {
 PRINT_ERROR("Runtime error: %s", "Uninitialized attribute _map");
-PRINT_ERROR(" (%s:%d)\n", FILE_standard__hash_collection, 303);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_standard__hash_collection, 304);
+fatal_exit(1);
 }
 var2 = var4;
 RET_LABEL3:(void)0;
@@ -2603,10 +2321,10 @@ RET_LABEL3:(void)0;
 var5 = standard___standard__HashMap___standard__abstract_collection__MapRead__iterator(var2);
 }
 {
-((void (*)(val* self, val* p0))(var1->class->vft[COLOR_standard__abstract_collection__MapValuesIterator__original_iterator_61d]))(var1, var5) /* original_iterator= on <var1:MapValuesIterator[nullable Object, nullable Object]>*/;
+((void(*)(val* self, val* p0))(var1->class->vft[COLOR_standard__abstract_collection__MapValuesIterator__original_iterator_61d]))(var1, var5); /* original_iterator= on <var1:MapValuesIterator[nullable Object, nullable Object]>*/
 }
 {
-((void (*)(val* self))(var1->class->vft[COLOR_standard__kernel__Object__init]))(var1) /* init on <var1:MapValuesIterator[nullable Object, nullable Object]>*/;
+((void(*)(val* self))(var1->class->vft[COLOR_standard__kernel__Object__init]))(var1); /* init on <var1:MapValuesIterator[nullable Object, nullable Object]>*/
 }
 var = var1;
 goto RET_LABEL;
@@ -2622,8 +2340,8 @@ val* var2 /* : HashMap[nullable Object, nullable Object] */;
 var2 = self->attrs[COLOR_standard__hash_collection__HashMapValues___map].val; /* _map on <self:HashMapValues[nullable Object, nullable Object]> */
 if (unlikely(var2 == NULL)) {
 PRINT_ERROR("Runtime error: %s", "Uninitialized attribute _map");
-PRINT_ERROR(" (%s:%d)\n", FILE_standard__hash_collection, 303);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_standard__hash_collection, 304);
+fatal_exit(1);
 }
 var = var2;
 RET_LABEL1:(void)0;
@@ -2636,104 +2354,75 @@ RET_LABEL:;
 }
 /* method hash_collection#HashMapValues#remove for (self: HashMapValues[nullable Object, nullable Object], nullable Object) */
 void standard__hash_collection___standard__hash_collection__HashMapValues___standard__abstract_collection__RemovableCollection__remove(val* self, val* p0) {
-short int var /* : Bool */;
-int cltype;
-int idtype;
-const struct type* type_struct;
-short int is_nullable;
-const char* var_class_name;
 val* var_item /* var item: nullable Object */;
-val* var1 /* : HashMap[nullable Object, nullable Object] */;
-val* var3 /* : HashMap[nullable Object, nullable Object] */;
+val* var /* : HashMap[nullable Object, nullable Object] */;
+val* var2 /* : HashMap[nullable Object, nullable Object] */;
 val* var_map /* var map: HashMap[nullable Object, nullable Object] */;
-val* var4 /* : nullable HashNode[nullable Object] */;
+val* var3 /* : nullable HashNode[nullable Object] */;
 val* var_c /* var c: nullable HashMapNode[nullable Object, nullable Object] */;
-val* var5 /* : null */;
-short int var6 /* : Bool */;
-short int var7 /* : Bool */;
+short int var4 /* : Bool */;
+short int var5 /* : Bool */;
 val* var_other /* var other: nullable Object */;
-short int var9 /* : Bool */;
+short int var7 /* : Bool */;
+short int var8 /* : Bool */;
+val* var9 /* : nullable Object */;
 short int var10 /* : Bool */;
-val* var11 /* : nullable Object */;
-short int var12 /* : Bool */;
-short int var13 /* : Bool */;
-val* var14 /* : nullable Object */;
-val* var15 /* : nullable HashNode[nullable Object] */;
-/* Covariant cast for argument 0 (item) <p0:nullable Object> isa V */
-/* <p0:nullable Object> isa V */
-type_struct = self->type->resolution_table->types[COLOR_standard__hash_collection__HashMapValues___35dV];
-cltype = type_struct->color;
-idtype = type_struct->id;
-is_nullable = type_struct->is_nullable;
-if(p0 == NULL) {
-var = is_nullable;
-} else {
-if(cltype >= p0->type->table_size) {
-var = 0;
-} else {
-var = p0->type->type_table[cltype] == idtype;
-}
-}
-if (unlikely(!var)) {
-var_class_name = p0 == NULL ? "null" : p0->type->name;
-PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "V", var_class_name);
-PRINT_ERROR(" (%s:%d)\n", FILE_standard__hash_collection, 345);
-show_backtrace(1);
-}
+short int var11 /* : Bool */;
+val* var12 /* : nullable Object */;
+val* var13 /* : nullable HashNode[nullable Object] */;
 var_item = p0;
 {
 { /* Inline hash_collection#HashMapValues#map (self) on <self:HashMapValues[nullable Object, nullable Object]> */
-var3 = self->attrs[COLOR_standard__hash_collection__HashMapValues___map].val; /* _map on <self:HashMapValues[nullable Object, nullable Object]> */
-if (unlikely(var3 == NULL)) {
+var2 = self->attrs[COLOR_standard__hash_collection__HashMapValues___map].val; /* _map on <self:HashMapValues[nullable Object, nullable Object]> */
+if (unlikely(var2 == NULL)) {
 PRINT_ERROR("Runtime error: %s", "Uninitialized attribute _map");
-PRINT_ERROR(" (%s:%d)\n", FILE_standard__hash_collection, 303);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_standard__hash_collection, 304);
+fatal_exit(1);
 }
-var1 = var3;
-RET_LABEL2:(void)0;
+var = var2;
+RET_LABEL1:(void)0;
 }
 }
-var_map = var1;
-var4 = var_map->attrs[COLOR_standard__hash_collection__HashCollection___first_item].val; /* _first_item on <var_map:HashMap[nullable Object, nullable Object]> */
-var_c = var4;
+var_map = var;
+var3 = var_map->attrs[COLOR_standard__hash_collection__HashCollection___first_item].val; /* _first_item on <var_map:HashMap[nullable Object, nullable Object]> */
+var_c = var3;
 for(;;) {
-var5 = NULL;
 if (var_c == NULL) {
-var6 = 0; /* is null */
+var4 = 0; /* is null */
 } else {
-var6 = 1; /* arg is null and recv is not */
+var4 = 1; /* arg is null and recv is not */
 }
 if (0) {
-{ /* Inline kernel#Object#!= (var_c,var5) on <var_c:nullable HashMapNode[nullable Object, nullable Object]> */
-var_other = var5;
+{ /* Inline kernel#Object#!= (var_c,((val*)NULL)) on <var_c:nullable HashMapNode[nullable Object, nullable Object]> */
+var_other = ((val*)NULL);
 {
-var9 = ((short int (*)(val* self, val* p0))(var_c->class->vft[COLOR_standard__kernel__Object___61d_61d]))(var_c, var_other) /* == on <var_c:nullable HashMapNode[nullable Object, nullable Object](HashMapNode[nullable Object, nullable Object])>*/;
+var7 = ((short int(*)(val* self, val* p0))(var_c->class->vft[COLOR_standard__kernel__Object___61d_61d]))(var_c, var_other); /* == on <var_c:nullable HashMapNode[nullable Object, nullable Object](HashMapNode[nullable Object, nullable Object])>*/
 }
-var10 = !var9;
-var7 = var10;
-goto RET_LABEL8;
-RET_LABEL8:(void)0;
+var8 = !var7;
+var5 = var8;
+goto RET_LABEL6;
+RET_LABEL6:(void)0;
 }
-var6 = var7;
+var4 = var5;
 }
-if (var6){
-var11 = var_c->attrs[COLOR_standard__hash_collection__HashMapNode___value].val; /* _value on <var_c:nullable HashMapNode[nullable Object, nullable Object](HashMapNode[nullable Object, nullable Object])> */
-if (var11 == NULL) {
-var12 = (var_item == NULL);
+if (var4){
+var9 = var_c->attrs[COLOR_standard__hash_collection__HashMapNode___value].val; /* _value on <var_c:nullable HashMapNode[nullable Object, nullable Object](HashMapNode[nullable Object, nullable Object])> */
+if (var9 == NULL) {
+var10 = (var_item == NULL);
 } else {
-var13 = ((short int (*)(val* self, val* p0))(var11->class->vft[COLOR_standard__kernel__Object___61d_61d]))(var11, var_item) /* == on <var11:nullable Object>*/;
-var12 = var13;
+var11 = ((short int(*)(val* self, val* p0))((((long)var9&3)?class_info[((long)var9&3)]:var9->class)->vft[COLOR_standard__kernel__Object___61d_61d]))(var9, var_item); /* == on <var9:nullable Object>*/
+var10 = var11;
 }
-if (var12){
-var14 = var_c->attrs[COLOR_standard__hash_collection__HashNode___key].val; /* _key on <var_c:nullable HashMapNode[nullable Object, nullable Object](HashMapNode[nullable Object, nullable Object])> */
+if (var10){
+var12 = var_c->attrs[COLOR_standard__hash_collection__HashNode___key].val; /* _key on <var_c:nullable HashMapNode[nullable Object, nullable Object](HashMapNode[nullable Object, nullable Object])> */
 {
-standard__hash_collection___standard__hash_collection__HashCollection___remove_node(var_map, var14); /* Direct call hash_collection#HashCollection#remove_node on <var_map:HashMap[nullable Object, nullable Object]>*/
+standard__hash_collection___standard__hash_collection__HashCollection___remove_node(var_map, var12); /* Direct call hash_collection#HashCollection#remove_node on <var_map:HashMap[nullable Object, nullable Object]>*/
 }
 goto RET_LABEL;
 } else {
 }
-var15 = var_c->attrs[COLOR_standard__hash_collection__HashNode___next_item].val; /* _next_item on <var_c:nullable HashMapNode[nullable Object, nullable Object](HashMapNode[nullable Object, nullable Object])> */
-var_c = var15;
+var13 = var_c->attrs[COLOR_standard__hash_collection__HashNode___next_item].val; /* _next_item on <var_c:nullable HashMapNode[nullable Object, nullable Object](HashMapNode[nullable Object, nullable Object])> */
+var_c = var13;
 } else {
 goto BREAK_label;
 }
@@ -2744,7 +2433,7 @@ RET_LABEL:;
 /* method hash_collection#HashMapValues#init for (self: HashMapValues[nullable Object, nullable Object]) */
 void standard__hash_collection___standard__hash_collection__HashMapValues___standard__kernel__Object__init(val* self) {
 {
-((void (*)(val* self))(self->class->vft[COLOR_standard__hash_collection___standard__hash_collection__HashMapValues___standard__kernel__Object__init]))(self) /* init on <self:HashMapValues[nullable Object, nullable Object]>*/;
+((void(*)(val* self))(self->class->vft[COLOR_standard__hash_collection___standard__hash_collection__HashMapValues___standard__kernel__Object__init]))(self); /* init on <self:HashMapValues[nullable Object, nullable Object]>*/
 }
 RET_LABEL:;
 }
@@ -2765,17 +2454,17 @@ is_nullable = type_struct->is_nullable;
 if(p0 == NULL) {
 var = is_nullable;
 } else {
-if(cltype >= p0->type->table_size) {
+if(cltype >= (((long)p0&3)?type_info[((long)p0&3)]:p0->type)->table_size) {
 var = 0;
 } else {
-var = p0->type->type_table[cltype] == idtype;
+var = (((long)p0&3)?type_info[((long)p0&3)]:p0->type)->type_table[cltype] == idtype;
 }
 }
 if (unlikely(!var)) {
-var_class_name = p0 == NULL ? "null" : p0->type->name;
+var_class_name = p0 == NULL ? "null" : (((long)p0&3)?type_info[((long)p0&3)]:p0->type)->name;
 PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "V", var_class_name);
-PRINT_ERROR(" (%s:%d)\n", FILE_standard__hash_collection, 374);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_standard__hash_collection, 375);
+fatal_exit(1);
 }
 self->attrs[COLOR_standard__hash_collection__HashMapNode___value].val = p0; /* _value on <self:HashMapNode[nullable Object, nullable Object]> */
 RET_LABEL:;
@@ -2783,7 +2472,7 @@ RET_LABEL:;
 /* method hash_collection#HashMapNode#init for (self: HashMapNode[nullable Object, nullable Object]) */
 void standard__hash_collection___standard__hash_collection__HashMapNode___standard__kernel__Object__init(val* self) {
 {
-((void (*)(val* self))(self->class->vft[COLOR_standard__hash_collection___standard__hash_collection__HashMapNode___standard__kernel__Object__init]))(self) /* init on <self:HashMapNode[nullable Object, nullable Object]>*/;
+((void(*)(val* self))(self->class->vft[COLOR_standard__hash_collection___standard__hash_collection__HashMapNode___standard__kernel__Object__init]))(self); /* init on <self:HashMapNode[nullable Object, nullable Object]>*/
 }
 RET_LABEL:;
 }
@@ -2791,33 +2480,31 @@ RET_LABEL:;
 short int standard___standard__HashMapIterator___standard__abstract_collection__MapIterator__is_ok(val* self) {
 short int var /* : Bool */;
 val* var1 /* : nullable HashMapNode[nullable Object, nullable Object] */;
-val* var2 /* : null */;
+short int var2 /* : Bool */;
 short int var3 /* : Bool */;
-short int var4 /* : Bool */;
 val* var_other /* var other: nullable Object */;
+short int var5 /* : Bool */;
 short int var6 /* : Bool */;
-short int var7 /* : Bool */;
 var1 = self->attrs[COLOR_standard__hash_collection__HashMapIterator___node].val; /* _node on <self:HashMapIterator[nullable Object, nullable Object]> */
-var2 = NULL;
 if (var1 == NULL) {
-var3 = 0; /* is null */
+var2 = 0; /* is null */
 } else {
-var3 = 1; /* arg is null and recv is not */
+var2 = 1; /* arg is null and recv is not */
 }
 if (0) {
-{ /* Inline kernel#Object#!= (var1,var2) on <var1:nullable HashMapNode[nullable Object, nullable Object]> */
-var_other = var2;
+{ /* Inline kernel#Object#!= (var1,((val*)NULL)) on <var1:nullable HashMapNode[nullable Object, nullable Object]> */
+var_other = ((val*)NULL);
 {
-var6 = ((short int (*)(val* self, val* p0))(var1->class->vft[COLOR_standard__kernel__Object___61d_61d]))(var1, var_other) /* == on <var1:nullable HashMapNode[nullable Object, nullable Object](HashMapNode[nullable Object, nullable Object])>*/;
+var5 = ((short int(*)(val* self, val* p0))(var1->class->vft[COLOR_standard__kernel__Object___61d_61d]))(var1, var_other); /* == on <var1:nullable HashMapNode[nullable Object, nullable Object](HashMapNode[nullable Object, nullable Object])>*/
 }
-var7 = !var6;
-var4 = var7;
-goto RET_LABEL5;
-RET_LABEL5:(void)0;
+var6 = !var5;
+var3 = var6;
+goto RET_LABEL4;
+RET_LABEL4:(void)0;
 }
-var3 = var4;
+var2 = var3;
 }
-var = var3;
+var = var2;
 goto RET_LABEL;
 RET_LABEL:;
 return var;
@@ -2833,14 +2520,14 @@ var1 = standard___standard__HashMapIterator___standard__abstract_collection__Map
 }
 if (unlikely(!var1)) {
 PRINT_ERROR("Runtime error: %s", "Assert failed");
-PRINT_ERROR(" (%s:%d)\n", FILE_standard__hash_collection, 384);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_standard__hash_collection, 385);
+fatal_exit(1);
 }
 var2 = self->attrs[COLOR_standard__hash_collection__HashMapIterator___node].val; /* _node on <self:HashMapIterator[nullable Object, nullable Object]> */
 if (unlikely(var2 == NULL)) {
 PRINT_ERROR("Runtime error: %s", "Receiver is null");
-PRINT_ERROR(" (%s:%d)\n", FILE_standard__hash_collection, 385);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_standard__hash_collection, 386);
+fatal_exit(1);
 }
 var3 = var2->attrs[COLOR_standard__hash_collection__HashMapNode___value].val; /* _value on <var2:nullable HashMapNode[nullable Object, nullable Object]> */
 var = var3;
@@ -2859,14 +2546,14 @@ var1 = standard___standard__HashMapIterator___standard__abstract_collection__Map
 }
 if (unlikely(!var1)) {
 PRINT_ERROR("Runtime error: %s", "Assert failed");
-PRINT_ERROR(" (%s:%d)\n", FILE_standard__hash_collection, 396);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_standard__hash_collection, 397);
+fatal_exit(1);
 }
 var2 = self->attrs[COLOR_standard__hash_collection__HashMapIterator___node].val; /* _node on <self:HashMapIterator[nullable Object, nullable Object]> */
 if (unlikely(var2 == NULL)) {
 PRINT_ERROR("Runtime error: %s", "Receiver is null");
-PRINT_ERROR(" (%s:%d)\n", FILE_standard__hash_collection, 397);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_standard__hash_collection, 398);
+fatal_exit(1);
 }
 var3 = var2->attrs[COLOR_standard__hash_collection__HashNode___key].val; /* _key on <var2:nullable HashMapNode[nullable Object, nullable Object]> */
 var = var3;
@@ -2884,14 +2571,14 @@ var = standard___standard__HashMapIterator___standard__abstract_collection__MapI
 }
 if (unlikely(!var)) {
 PRINT_ERROR("Runtime error: %s", "Assert failed");
-PRINT_ERROR(" (%s:%d)\n", FILE_standard__hash_collection, 402);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_standard__hash_collection, 403);
+fatal_exit(1);
 }
 var1 = self->attrs[COLOR_standard__hash_collection__HashMapIterator___node].val; /* _node on <self:HashMapIterator[nullable Object, nullable Object]> */
 if (unlikely(var1 == NULL)) {
 PRINT_ERROR("Runtime error: %s", "Receiver is null");
-PRINT_ERROR(" (%s:%d)\n", FILE_standard__hash_collection, 403);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_standard__hash_collection, 404);
+fatal_exit(1);
 }
 var2 = var1->attrs[COLOR_standard__hash_collection__HashNode___next_item].val; /* _next_item on <var1:nullable HashMapNode[nullable Object, nullable Object]> */
 self->attrs[COLOR_standard__hash_collection__HashMapIterator___node].val = var2; /* _node on <self:HashMapIterator[nullable Object, nullable Object]> */
@@ -2904,8 +2591,8 @@ val* var1 /* : HashMap[nullable Object, nullable Object] */;
 var1 = self->attrs[COLOR_standard__hash_collection__HashMapIterator___map].val; /* _map on <self:HashMapIterator[nullable Object, nullable Object]> */
 if (unlikely(var1 == NULL)) {
 PRINT_ERROR("Runtime error: %s", "Uninitialized attribute _map");
-PRINT_ERROR(" (%s:%d)\n", FILE_standard__hash_collection, 406);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_standard__hash_collection, 407);
+fatal_exit(1);
 }
 var = var1;
 RET_LABEL:;
@@ -2931,8 +2618,8 @@ var = p0->type->type_table[cltype] == idtype;
 if (unlikely(!var)) {
 var_class_name = p0 == NULL ? "null" : p0->type->name;
 PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "HashMap[K, V]", var_class_name);
-PRINT_ERROR(" (%s:%d)\n", FILE_standard__hash_collection, 406);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_standard__hash_collection, 407);
+fatal_exit(1);
 }
 self->attrs[COLOR_standard__hash_collection__HashMapIterator___map].val = p0; /* _map on <self:HashMapIterator[nullable Object, nullable Object]> */
 RET_LABEL:;
@@ -2948,8 +2635,8 @@ val* var4 /* : nullable HashNode[nullable Object] */;
 var2 = self->attrs[COLOR_standard__hash_collection__HashMapIterator___map].val; /* _map on <self:HashMapIterator[nullable Object, nullable Object]> */
 if (unlikely(var2 == NULL)) {
 PRINT_ERROR("Runtime error: %s", "Uninitialized attribute _map");
-PRINT_ERROR(" (%s:%d)\n", FILE_standard__hash_collection, 406);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_standard__hash_collection, 407);
+fatal_exit(1);
 }
 var = var2;
 RET_LABEL1:(void)0;
@@ -2959,8 +2646,8 @@ self->attrs[COLOR_standard__hash_collection__HashMapIterator___map].val = var; /
 var3 = self->attrs[COLOR_standard__hash_collection__HashMapIterator___map].val; /* _map on <self:HashMapIterator[nullable Object, nullable Object]> */
 if (unlikely(var3 == NULL)) {
 PRINT_ERROR("Runtime error: %s", "Uninitialized attribute _map");
-PRINT_ERROR(" (%s:%d)\n", FILE_standard__hash_collection, 415);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_standard__hash_collection, 416);
+fatal_exit(1);
 }
 var4 = var3->attrs[COLOR_standard__hash_collection__HashCollection___first_item].val; /* _first_item on <var3:HashMap[nullable Object, nullable Object]> */
 self->attrs[COLOR_standard__hash_collection__HashMapIterator___node].val = var4; /* _node on <self:HashMapIterator[nullable Object, nullable Object]> */
@@ -2980,20 +2667,18 @@ return var;
 short int standard___standard__HashSet___standard__abstract_collection__Collection__is_empty(val* self) {
 short int var /* : Bool */;
 long var1 /* : Int */;
-long var2 /* : Int */;
-short int var3 /* : Bool */;
-short int var5 /* : Bool */;
+short int var2 /* : Bool */;
+short int var4 /* : Bool */;
 var1 = self->attrs[COLOR_standard__hash_collection__HashCollection___the_length].l; /* _the_length on <self:HashSet[nullable Object]> */
-var2 = 0;
 {
-{ /* Inline kernel#Int#== (var1,var2) on <var1:Int> */
-var5 = var1 == var2;
-var3 = var5;
-goto RET_LABEL4;
-RET_LABEL4:(void)0;
+{ /* Inline kernel#Int#== (var1,0l) on <var1:Int> */
+var4 = var1 == 0l;
+var2 = var4;
+goto RET_LABEL3;
+RET_LABEL3:(void)0;
 }
 }
-var = var3;
+var = var2;
 goto RET_LABEL;
 RET_LABEL:;
 return var;
@@ -3002,47 +2687,45 @@ return var;
 val* standard___standard__HashSet___standard__abstract_collection__Collection__first(val* self) {
 val* var /* : nullable Object */;
 long var1 /* : Int */;
-long var2 /* : Int */;
-short int var3 /* : Bool */;
-short int var5 /* : Bool */;
+short int var2 /* : Bool */;
+short int var4 /* : Bool */;
 int cltype;
 int idtype;
 const char* var_class_name;
-short int var6 /* : Bool */;
-val* var7 /* : nullable HashNode[nullable Object] */;
-val* var8 /* : nullable Object */;
+short int var5 /* : Bool */;
+val* var6 /* : nullable HashNode[nullable Object] */;
+val* var7 /* : nullable Object */;
 var1 = self->attrs[COLOR_standard__hash_collection__HashCollection___the_length].l; /* _the_length on <self:HashSet[nullable Object]> */
-var2 = 0;
 {
-{ /* Inline kernel#Int#> (var1,var2) on <var1:Int> */
-/* Covariant cast for argument 0 (i) <var2:Int> isa OTHER */
-/* <var2:Int> isa OTHER */
-var5 = 1; /* easy <var2:Int> isa OTHER*/
-if (unlikely(!var5)) {
+{ /* Inline kernel#Int#> (var1,0l) on <var1:Int> */
+/* Covariant cast for argument 0 (i) <0l:Int> isa OTHER */
+/* <0l:Int> isa OTHER */
+var4 = 1; /* easy <0l:Int> isa OTHER*/
+if (unlikely(!var4)) {
 var_class_name = type_standard__Int.name;
 PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name);
-PRINT_ERROR(" (%s:%d)\n", FILE_standard__kernel, 412);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_standard__kernel, 536);
+fatal_exit(1);
 }
-var6 = var1 > var2;
-var3 = var6;
-goto RET_LABEL4;
-RET_LABEL4:(void)0;
+var5 = var1 > 0l;
+var2 = var5;
+goto RET_LABEL3;
+RET_LABEL3:(void)0;
 }
 }
-if (unlikely(!var3)) {
+if (unlikely(!var2)) {
 PRINT_ERROR("Runtime error: %s", "Assert failed");
-PRINT_ERROR(" (%s:%d)\n", FILE_standard__hash_collection, 433);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_standard__hash_collection, 434);
+fatal_exit(1);
 }
-var7 = self->attrs[COLOR_standard__hash_collection__HashCollection___first_item].val; /* _first_item on <self:HashSet[nullable Object]> */
-if (unlikely(var7 == NULL)) {
+var6 = self->attrs[COLOR_standard__hash_collection__HashCollection___first_item].val; /* _first_item on <self:HashSet[nullable Object]> */
+if (unlikely(var6 == NULL)) {
 PRINT_ERROR("Runtime error: %s", "Receiver is null");
-PRINT_ERROR(" (%s:%d)\n", FILE_standard__hash_collection, 434);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_standard__hash_collection, 435);
+fatal_exit(1);
 }
-var8 = var7->attrs[COLOR_standard__hash_collection__HashNode___key].val; /* _key on <var7:nullable HashNode[nullable Object](nullable HashSetNode[nullable Object])> */
-var = var8;
+var7 = var6->attrs[COLOR_standard__hash_collection__HashNode___key].val; /* _key on <var6:nullable HashNode[nullable Object](nullable HashSetNode[nullable Object])> */
+var = var7;
 goto RET_LABEL;
 RET_LABEL:;
 return var;
@@ -3050,65 +2733,36 @@ return var;
 /* method hash_collection#HashSet#has for (self: HashSet[nullable Object], nullable Object): Bool */
 short int standard___standard__HashSet___standard__abstract_collection__Collection__has(val* self, val* p0) {
 short int var /* : Bool */;
-short int var1 /* : Bool */;
-int cltype;
-int idtype;
-const struct type* type_struct;
-short int is_nullable;
-const char* var_class_name;
 val* var_item /* var item: nullable Object */;
-val* var2 /* : nullable HashNode[nullable Object] */;
-val* var3 /* : null */;
-short int var4 /* : Bool */;
-short int var5 /* : Bool */;
+val* var1 /* : nullable HashNode[nullable Object] */;
+short int var2 /* : Bool */;
+short int var3 /* : Bool */;
 val* var_other /* var other: nullable Object */;
-short int var7 /* : Bool */;
-short int var8 /* : Bool */;
-/* Covariant cast for argument 0 (item) <p0:nullable Object> isa E */
-/* <p0:nullable Object> isa E */
-type_struct = self->type->resolution_table->types[COLOR_standard__HashSet___35dE];
-cltype = type_struct->color;
-idtype = type_struct->id;
-is_nullable = type_struct->is_nullable;
-if(p0 == NULL) {
-var1 = is_nullable;
-} else {
-if(cltype >= p0->type->table_size) {
-var1 = 0;
-} else {
-var1 = p0->type->type_table[cltype] == idtype;
-}
-}
-if (unlikely(!var1)) {
-var_class_name = p0 == NULL ? "null" : p0->type->name;
-PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "E", var_class_name);
-PRINT_ERROR(" (%s:%d)\n", FILE_standard__hash_collection, 437);
-show_backtrace(1);
-}
+short int var5 /* : Bool */;
+short int var6 /* : Bool */;
 var_item = p0;
 {
-var2 = standard__hash_collection___standard__hash_collection__HashCollection___node_at(self, var_item);
+var1 = standard__hash_collection___standard__hash_collection__HashCollection___node_at(self, var_item);
 }
-var3 = NULL;
-if (var2 == NULL) {
-var4 = 0; /* is null */
+if (var1 == NULL) {
+var2 = 0; /* is null */
 } else {
-var4 = 1; /* arg is null and recv is not */
+var2 = 1; /* arg is null and recv is not */
 }
 if (0) {
-{ /* Inline kernel#Object#!= (var2,var3) on <var2:nullable HashNode[nullable Object](nullable HashSetNode[nullable Object])> */
-var_other = var3;
+{ /* Inline kernel#Object#!= (var1,((val*)NULL)) on <var1:nullable HashNode[nullable Object](nullable HashSetNode[nullable Object])> */
+var_other = ((val*)NULL);
 {
-var7 = ((short int (*)(val* self, val* p0))(var2->class->vft[COLOR_standard__kernel__Object___61d_61d]))(var2, var_other) /* == on <var2:nullable HashSetNode[nullable Object](HashSetNode[nullable Object])>*/;
+var5 = ((short int(*)(val* self, val* p0))(var1->class->vft[COLOR_standard__kernel__Object___61d_61d]))(var1, var_other); /* == on <var1:nullable HashSetNode[nullable Object](HashSetNode[nullable Object])>*/
 }
-var8 = !var7;
-var5 = var8;
-goto RET_LABEL6;
-RET_LABEL6:(void)0;
+var6 = !var5;
+var3 = var6;
+goto RET_LABEL4;
+RET_LABEL4:(void)0;
 }
-var4 = var5;
+var2 = var3;
 }
-var = var4;
+var = var2;
 goto RET_LABEL;
 RET_LABEL:;
 return var;
@@ -3126,13 +2780,12 @@ long var1 /* : Int */;
 long var_i /* var i: Int */;
 val* var2 /* : nullable HashNode[nullable Object] */;
 val* var_c /* var c: nullable HashSetNode[nullable Object] */;
-val* var3 /* : null */;
+short int var3 /* : Bool */;
 short int var4 /* : Bool */;
-short int var5 /* : Bool */;
 val* var_other /* var other: nullable Object */;
+short int var6 /* : Bool */;
 short int var7 /* : Bool */;
-short int var8 /* : Bool */;
-val* var9 /* : HashSetNode[nullable Object] */;
+val* var8 /* : HashSetNode[nullable Object] */;
 /* Covariant cast for argument 0 (item) <p0:nullable Object> isa E */
 /* <p0:nullable Object> isa E */
 type_struct = self->type->resolution_table->types[COLOR_standard__HashSet___35dE];
@@ -3142,17 +2795,17 @@ is_nullable = type_struct->is_nullable;
 if(p0 == NULL) {
 var = is_nullable;
 } else {
-if(cltype >= p0->type->table_size) {
+if(cltype >= (((long)p0&3)?type_info[((long)p0&3)]:p0->type)->table_size) {
 var = 0;
 } else {
-var = p0->type->type_table[cltype] == idtype;
+var = (((long)p0&3)?type_info[((long)p0&3)]:p0->type)->type_table[cltype] == idtype;
 }
 }
 if (unlikely(!var)) {
-var_class_name = p0 == NULL ? "null" : p0->type->name;
+var_class_name = p0 == NULL ? "null" : (((long)p0&3)?type_info[((long)p0&3)]:p0->type)->name;
 PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "E", var_class_name);
-PRINT_ERROR(" (%s:%d)\n", FILE_standard__hash_collection, 442);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_standard__hash_collection, 443);
+fatal_exit(1);
 }
 var_item = p0;
 {
@@ -3163,71 +2816,43 @@ var_i = var1;
 var2 = standard__hash_collection___standard__hash_collection__HashCollection___node_at_idx(self, var_i, var_item);
 }
 var_c = var2;
-var3 = NULL;
 if (var_c == NULL) {
-var4 = 0; /* is null */
+var3 = 0; /* is null */
 } else {
-var4 = 1; /* arg is null and recv is not */
+var3 = 1; /* arg is null and recv is not */
 }
 if (0) {
-{ /* Inline kernel#Object#!= (var_c,var3) on <var_c:nullable HashSetNode[nullable Object]> */
-var_other = var3;
+{ /* Inline kernel#Object#!= (var_c,((val*)NULL)) on <var_c:nullable HashSetNode[nullable Object]> */
+var_other = ((val*)NULL);
 {
-var7 = ((short int (*)(val* self, val* p0))(var_c->class->vft[COLOR_standard__kernel__Object___61d_61d]))(var_c, var_other) /* == on <var_c:nullable HashSetNode[nullable Object](HashSetNode[nullable Object])>*/;
+var6 = ((short int(*)(val* self, val* p0))(var_c->class->vft[COLOR_standard__kernel__Object___61d_61d]))(var_c, var_other); /* == on <var_c:nullable HashSetNode[nullable Object](HashSetNode[nullable Object])>*/
 }
-var8 = !var7;
-var5 = var8;
-goto RET_LABEL6;
-RET_LABEL6:(void)0;
+var7 = !var6;
+var4 = var7;
+goto RET_LABEL5;
+RET_LABEL5:(void)0;
 }
-var4 = var5;
+var3 = var4;
 }
-if (var4){
+if (var3){
 var_c->attrs[COLOR_standard__hash_collection__HashNode___key].val = var_item; /* _key on <var_c:nullable HashSetNode[nullable Object](HashSetNode[nullable Object])> */
 } else {
-var9 = NEW_standard__hash_collection__HashSetNode(self->type->resolution_table->types[COLOR_standard__hash_collection__HashSetNode__standard__HashSet___35dE]);
+var8 = NEW_standard__hash_collection__HashSetNode(self->type->resolution_table->types[COLOR_standard__hash_collection__HashSetNode__standard__HashSet___35dE]);
 {
-((void (*)(val* self, val* p0))(var9->class->vft[COLOR_standard__hash_collection__HashNode__key_61d]))(var9, var_item) /* key= on <var9:HashSetNode[nullable Object]>*/;
+((void(*)(val* self, val* p0))(var8->class->vft[COLOR_standard__hash_collection__HashNode__key_61d]))(var8, var_item); /* key= on <var8:HashSetNode[nullable Object]>*/
 }
 {
-((void (*)(val* self))(var9->class->vft[COLOR_standard__kernel__Object__init]))(var9) /* init on <var9:HashSetNode[nullable Object]>*/;
+((void(*)(val* self))(var8->class->vft[COLOR_standard__kernel__Object__init]))(var8); /* init on <var8:HashSetNode[nullable Object]>*/
 }
 {
-standard__hash_collection___standard__hash_collection__HashCollection___store(self, var_i, var9); /* Direct call hash_collection#HashCollection#store on <self:HashSet[nullable Object]>*/
+standard__hash_collection___standard__hash_collection__HashCollection___store(self, var_i, var8); /* Direct call hash_collection#HashCollection#store on <self:HashSet[nullable Object]>*/
 }
 }
 RET_LABEL:;
 }
 /* method hash_collection#HashSet#remove for (self: HashSet[nullable Object], nullable Object) */
 void standard___standard__HashSet___standard__abstract_collection__RemovableCollection__remove(val* self, val* p0) {
-short int var /* : Bool */;
-int cltype;
-int idtype;
-const struct type* type_struct;
-short int is_nullable;
-const char* var_class_name;
 val* var_item /* var item: nullable Object */;
-/* Covariant cast for argument 0 (item) <p0:nullable Object> isa E */
-/* <p0:nullable Object> isa E */
-type_struct = self->type->resolution_table->types[COLOR_standard__HashSet___35dE];
-cltype = type_struct->color;
-idtype = type_struct->id;
-is_nullable = type_struct->is_nullable;
-if(p0 == NULL) {
-var = is_nullable;
-} else {
-if(cltype >= p0->type->table_size) {
-var = 0;
-} else {
-var = p0->type->type_table[cltype] == idtype;
-}
-}
-if (unlikely(!var)) {
-var_class_name = p0 == NULL ? "null" : p0->type->name;
-PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "E", var_class_name);
-PRINT_ERROR(" (%s:%d)\n", FILE_standard__hash_collection, 453);
-show_backtrace(1);
-}
 var_item = p0;
 {
 standard__hash_collection___standard__hash_collection__HashCollection___remove_node(self, var_item); /* Direct call hash_collection#HashCollection#remove_node on <self:HashSet[nullable Object]>*/
@@ -3247,10 +2872,10 @@ val* var /* : Iterator[nullable Object] */;
 val* var1 /* : HashSetIterator[nullable Object] */;
 var1 = NEW_standard__hash_collection__HashSetIterator(self->type->resolution_table->types[COLOR_standard__hash_collection__HashSetIterator__standard__HashSet___35dE]);
 {
-((void (*)(val* self, val* p0))(var1->class->vft[COLOR_standard__hash_collection__HashSetIterator__set_61d]))(var1, self) /* set= on <var1:HashSetIterator[nullable Object]>*/;
+((void(*)(val* self, val* p0))(var1->class->vft[COLOR_standard__hash_collection__HashSetIterator__set_61d]))(var1, self); /* set= on <var1:HashSetIterator[nullable Object]>*/
 }
 {
-((void (*)(val* self))(var1->class->vft[COLOR_standard__kernel__Object__init]))(var1) /* init on <var1:HashSetIterator[nullable Object]>*/;
+((void(*)(val* self))(var1->class->vft[COLOR_standard__kernel__Object__init]))(var1); /* init on <var1:HashSetIterator[nullable Object]>*/
 }
 var = var1;
 goto RET_LABEL;
@@ -3259,19 +2884,13 @@ return var;
 }
 /* method hash_collection#HashSet#init for (self: HashSet[nullable Object]) */
 void standard___standard__HashSet___standard__kernel__Object__init(val* self) {
-long var /* : Int */;
-long var1 /* : Int */;
-long var2 /* : Int */;
 {
-((void (*)(val* self))(self->class->vft[COLOR_standard___standard__HashSet___standard__kernel__Object__init]))(self) /* init on <self:HashSet[nullable Object]>*/;
+((void(*)(val* self))(self->class->vft[COLOR_standard___standard__HashSet___standard__kernel__Object__init]))(self); /* init on <self:HashSet[nullable Object]>*/
 }
-var = 0;
-self->attrs[COLOR_standard__hash_collection__HashCollection___capacity].l = var; /* _capacity on <self:HashSet[nullable Object]> */
-var1 = 0;
-self->attrs[COLOR_standard__hash_collection__HashCollection___the_length].l = var1; /* _the_length on <self:HashSet[nullable Object]> */
-var2 = 0;
+self->attrs[COLOR_standard__hash_collection__HashCollection___capacity].l = 0l; /* _capacity on <self:HashSet[nullable Object]> */
+self->attrs[COLOR_standard__hash_collection__HashCollection___the_length].l = 0l; /* _the_length on <self:HashSet[nullable Object]> */
 {
-standard__hash_collection___standard__hash_collection__HashCollection___enlarge(self, var2); /* Direct call hash_collection#HashCollection#enlarge on <self:HashSet[nullable Object]>*/
+standard__hash_collection___standard__hash_collection__HashCollection___enlarge(self, 0l); /* Direct call hash_collection#HashCollection#enlarge on <self:HashSet[nullable Object]>*/
 }
 RET_LABEL:;
 }
@@ -3288,16 +2907,16 @@ val* var_coll /* var coll: Collection[nullable Object] */;
 type_struct = self->type->resolution_table->types[COLOR_standard__Collection__standard__HashSet___35dE];
 cltype = type_struct->color;
 idtype = type_struct->id;
-if(cltype >= p0->type->table_size) {
+if(cltype >= (((long)p0&3)?type_info[((long)p0&3)]:p0->type)->table_size) {
 var = 0;
 } else {
-var = p0->type->type_table[cltype] == idtype;
+var = (((long)p0&3)?type_info[((long)p0&3)]:p0->type)->type_table[cltype] == idtype;
 }
 if (unlikely(!var)) {
-var_class_name = p0 == NULL ? "null" : p0->type->name;
+var_class_name = p0 == NULL ? "null" : (((long)p0&3)?type_info[((long)p0&3)]:p0->type)->name;
 PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "Collection[E]", var_class_name);
-PRINT_ERROR(" (%s:%d)\n", FILE_standard__hash_collection, 466);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_standard__hash_collection, 467);
+fatal_exit(1);
 }
 var_coll = p0;
 {
@@ -3312,33 +2931,31 @@ RET_LABEL:;
 short int standard__hash_collection___standard__hash_collection__HashSetIterator___standard__abstract_collection__Iterator__is_ok(val* self) {
 short int var /* : Bool */;
 val* var1 /* : nullable HashSetNode[nullable Object] */;
-val* var2 /* : null */;
+short int var2 /* : Bool */;
 short int var3 /* : Bool */;
-short int var4 /* : Bool */;
 val* var_other /* var other: nullable Object */;
+short int var5 /* : Bool */;
 short int var6 /* : Bool */;
-short int var7 /* : Bool */;
 var1 = self->attrs[COLOR_standard__hash_collection__HashSetIterator___node].val; /* _node on <self:HashSetIterator[nullable Object]> */
-var2 = NULL;
 if (var1 == NULL) {
-var3 = 0; /* is null */
+var2 = 0; /* is null */
 } else {
-var3 = 1; /* arg is null and recv is not */
+var2 = 1; /* arg is null and recv is not */
 }
 if (0) {
-{ /* Inline kernel#Object#!= (var1,var2) on <var1:nullable HashSetNode[nullable Object]> */
-var_other = var2;
+{ /* Inline kernel#Object#!= (var1,((val*)NULL)) on <var1:nullable HashSetNode[nullable Object]> */
+var_other = ((val*)NULL);
 {
-var6 = ((short int (*)(val* self, val* p0))(var1->class->vft[COLOR_standard__kernel__Object___61d_61d]))(var1, var_other) /* == on <var1:nullable HashSetNode[nullable Object](HashSetNode[nullable Object])>*/;
+var5 = ((short int(*)(val* self, val* p0))(var1->class->vft[COLOR_standard__kernel__Object___61d_61d]))(var1, var_other); /* == on <var1:nullable HashSetNode[nullable Object](HashSetNode[nullable Object])>*/
 }
-var7 = !var6;
-var4 = var7;
-goto RET_LABEL5;
-RET_LABEL5:(void)0;
+var6 = !var5;
+var3 = var6;
+goto RET_LABEL4;
+RET_LABEL4:(void)0;
 }
-var3 = var4;
+var2 = var3;
 }
-var = var3;
+var = var2;
 goto RET_LABEL;
 RET_LABEL:;
 return var;
@@ -3354,14 +2971,14 @@ var1 = standard__hash_collection___standard__hash_collection__HashSetIterator___
 }
 if (unlikely(!var1)) {
 PRINT_ERROR("Runtime error: %s", "Assert failed");
-PRINT_ERROR(" (%s:%d)\n", FILE_standard__hash_collection, 486);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_standard__hash_collection, 487);
+fatal_exit(1);
 }
 var2 = self->attrs[COLOR_standard__hash_collection__HashSetIterator___node].val; /* _node on <self:HashSetIterator[nullable Object]> */
 if (unlikely(var2 == NULL)) {
 PRINT_ERROR("Runtime error: %s", "Receiver is null");
-PRINT_ERROR(" (%s:%d)\n", FILE_standard__hash_collection, 487);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_standard__hash_collection, 488);
+fatal_exit(1);
 }
 var3 = var2->attrs[COLOR_standard__hash_collection__HashNode___key].val; /* _key on <var2:nullable HashSetNode[nullable Object]> */
 var = var3;
@@ -3379,14 +2996,14 @@ var = standard__hash_collection___standard__hash_collection__HashSetIterator___s
 }
 if (unlikely(!var)) {
 PRINT_ERROR("Runtime error: %s", "Assert failed");
-PRINT_ERROR(" (%s:%d)\n", FILE_standard__hash_collection, 492);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_standard__hash_collection, 493);
+fatal_exit(1);
 }
 var1 = self->attrs[COLOR_standard__hash_collection__HashSetIterator___node].val; /* _node on <self:HashSetIterator[nullable Object]> */
 if (unlikely(var1 == NULL)) {
 PRINT_ERROR("Runtime error: %s", "Receiver is null");
-PRINT_ERROR(" (%s:%d)\n", FILE_standard__hash_collection, 493);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_standard__hash_collection, 494);
+fatal_exit(1);
 }
 var2 = var1->attrs[COLOR_standard__hash_collection__HashNode___next_item].val; /* _next_item on <var1:nullable HashSetNode[nullable Object]> */
 self->attrs[COLOR_standard__hash_collection__HashSetIterator___node].val = var2; /* _node on <self:HashSetIterator[nullable Object]> */
@@ -3412,8 +3029,8 @@ var = p0->type->type_table[cltype] == idtype;
 if (unlikely(!var)) {
 var_class_name = p0 == NULL ? "null" : p0->type->name;
 PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "HashSet[E]", var_class_name);
-PRINT_ERROR(" (%s:%d)\n", FILE_standard__hash_collection, 496);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_standard__hash_collection, 497);
+fatal_exit(1);
 }
 self->attrs[COLOR_standard__hash_collection__HashSetIterator___set].val = p0; /* _set on <self:HashSetIterator[nullable Object]> */
 RET_LABEL:;
@@ -3425,8 +3042,8 @@ val* var1 /* : nullable HashNode[nullable Object] */;
 var = self->attrs[COLOR_standard__hash_collection__HashSetIterator___set].val; /* _set on <self:HashSetIterator[nullable Object]> */
 if (unlikely(var == NULL)) {
 PRINT_ERROR("Runtime error: %s", "Uninitialized attribute _set");
-PRINT_ERROR(" (%s:%d)\n", FILE_standard__hash_collection, 504);
-show_backtrace(1);
+PRINT_ERROR(" (%s:%d)\n", FILE_standard__hash_collection, 505);
+fatal_exit(1);
 }
 var1 = var->attrs[COLOR_standard__hash_collection__HashCollection___first_item].val; /* _first_item on <var:HashSet[nullable Object]> */
 self->attrs[COLOR_standard__hash_collection__HashSetIterator___node].val = var1; /* _node on <self:HashSetIterator[nullable Object]> */