Crash when a constant null typeid is checked for properties. #1679

releasenotes.md

@@ -41,6 +41,7 @@
 - Incorrect "no-libc" definition of `cos`, making it unavailable for wasm.
 - Fix issue with the adjoint and inverse calculations for `Matrix2x2`.
 - It was possible to create 0 length arrays using byte literals. #1678
+- Crash when a constant null typeid is checked for properties. #1679
 
 ### Stdlib changes
 - Add `io::MultiReader`, `io::MultiWriter`, and `io::TeeReader` structs.

src/compiler/sema_expr.c

@@ -4289,6 +4289,7 @@ static bool sema_expr_rewrite_to_typeid_property(SemaContext *context, Expr *exp
 	if (sema_cast_const(typeid))
 	{
 		Type *type = typeid->const_expr.typeid;
+		if (type == NULL) return false;
 		if (!sema_type_property_is_valid_for_type(type, property)) return false;
 		*was_error = !sema_expr_rewrite_to_type_property(context, expr, type, property, type);
 		return true;