+++ /dev/null
---- a/gcc/ubsan.c
-+++ b/gcc/ubsan.c
-@@ -1471,7 +1471,7 @@ ubsan_use_new_style_p (location_t loc)
-
- expanded_location xloc = expand_location (loc);
- if (xloc.file == NULL || strncmp (xloc.file, "\1", 2) == 0
-- || xloc.file == '\0' || xloc.file[0] == '\xff'
-+ || xloc.file[0] == '\0' || xloc.file[0] == '\xff'
- || xloc.file[1] == '\xff')
- return false;
-