- Crash when trying to create a const zero untyped list #2847

releasenotes.md

@@ -139,6 +139,7 @@
 - Packed structs sometimes not lowered as such.
 - Crash when creating `$Type*` where `$Type` is an optional type #2848
 - Crashes when using `io::EOF~!` in various unhandled places. #2848
+- Crash when trying to create a const zero untyped list #2847
 
 ### Stdlib changes
 - Add `ThreadPool` join function to wait for all threads to finish in the pool without destroying the threads.

src/compiler/expr.c

@@ -702,10 +702,14 @@ void expr_rewrite_to_const_zero(Expr *expr, Type *type)
 		case TYPE_OPTIONAL:
 		case TYPE_TYPEINFO:
 		case TYPE_MEMBER:
-		case TYPE_UNTYPED_LIST:
 		case TYPE_INFERRED_ARRAY:
 		case TYPE_FLEXIBLE_ARRAY:
 			UNREACHABLE_VOID
+		case TYPE_UNTYPED_LIST:
+			expr->const_expr.const_kind = CONST_UNTYPED_LIST;
+			expr->const_expr.untyped_list = NULL;
+			expr->resolve_status = RESOLVE_DONE;
+			break;
 		case TYPE_SLICE:
 			expr_rewrite_const_empty_slice(expr, type);
 			return;

test/test_suite/macros/typeof_untyped_list_zero.c3t

@@ -0,0 +1,4 @@
+fn void main()
+{
+	$typeof({1}) $untyped_list;
+}