Merge pull request #4130 from fusion32/fix-ambiguous-generic-type-names

fix ambiguous generic type names

src/check_expr.cpp

@@ -7629,7 +7629,7 @@ gb_internal CallArgumentError check_polymorphic_record_type(CheckerContext *c, O
 			gbString s = gb_string_make_reserve(heap_allocator(), e->token.string.len+3);
 			s = gb_string_append_fmt(s, "%.*s(", LIT(e->token.string));
 
-			TypeTuple *tuple = get_record_polymorphic_params(e->type);
+			TypeTuple *tuple = get_record_polymorphic_params(bt);
 			if (tuple != nullptr) for_array(i, tuple->variables) {
 				Entity *v = tuple->variables[i];
 				String name = v->token.string;
@@ -7644,8 +7644,10 @@ gb_internal CallArgumentError check_polymorphic_record_type(CheckerContext *c, O
 						s = write_type_to_string(s, v->type, false);
 					}
 				} else if (v->kind == Entity_Constant) {
-					s = gb_string_append_fmt(s, "=");
-					s = write_exact_value_to_string(s, v->Constant.value);
+					if (v->Constant.value.kind != ExactValue_Invalid) {
+						s = gb_string_append_fmt(s, "=");
+						s = write_exact_value_to_string(s, v->Constant.value);
+					}
 				}
 			}
 			s = gb_string_append_fmt(s, ")");