| 123456789101112 | diff -Nur gcc-gcc-6-branch-csky.orig/gcc/ubsan.c gcc-gcc-6-branch-csky/gcc/ubsan.c--- gcc-gcc-6-branch-csky.orig/gcc/ubsan.c	2018-03-10 14:10:55.000000000 +0100+++ gcc-gcc-6-branch-csky/gcc/ubsan.c	2018-03-10 21:16:06.358370414 +0100@@ -1471,7 +1471,7 @@    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; 
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