$OpenBSD: patch-gcc_ubsan_c,v 1.1 2018/04/09 06:29:21 bentley Exp $

Fix check for empty string. From gcc r239971.

Index: gcc/ubsan.c
--- gcc/ubsan.c.orig
+++ 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;
 
