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--- a/src/gcc/gcc.c
+++ b/src/gcc/gcc.c
@@ -8038,10 +8038,15 @@
q2++;
if (*q2 == ':')
ml_end = q2;
- new_multilib_os_dir = XNEWVEC (char, ml_end - q);
- memcpy (new_multilib_os_dir, q + 1, ml_end - q - 1);
- new_multilib_os_dir[ml_end - q - 1] = '\0';
- multilib_os_dir = *new_multilib_os_dir ? new_multilib_os_dir : ".";
+ if (ml_end - q == 1)
+ multilib_os_dir = xstrdup (".");
+ else
+ {
+ new_multilib_os_dir = XNEWVEC (char, ml_end - q);
+ memcpy (new_multilib_os_dir, q + 1, ml_end - q - 1);
+ new_multilib_os_dir[ml_end - q - 1] = '\0';
+ multilib_os_dir = new_multilib_os_dir;
+ }
if (q2 < end && *q2 == ':')
{
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