Control: reassign -1 gcc-4.9,nfs-kernel-server Control: found -1 nfs-kernel-server/1.2.8-8 Control: found -1 gcc-4.9/4.9.1
On Mon, Aug 11, 2014 at 12:54:00PM -0700, Petr Vandrovec wrote:
> amd64. I think it affects all architectures. In case you want to
> follow-up, attached is minimum testcase I could come up with. It
> crashes with gcc-4.9 and -O2. No crash with gcc-4.8, or at -O1.
> $gcc-4.9 -W -Wall -O2 client.c && ./a.out
> Segmentation fault
> $gcc-4.8 -W -Wall -O2 client.c && ./a.out
> $gcc-4.9 -W -Wall -O1 client.c && ./a.out
> $
Thanks.
Matthias, could you please have a look at the below test case? We have a
regression in the latest nfs-kernel-server build, which appears to be caused
by a gcc-4.9 bug.
Should I work around this in nfs-utils, or is a quick fix possible in
gcc-4.9?
> char buf[100];
>
> void
> add_name(char *old)
> {
> char *cp = old;
>
> while (cp && *cp) {
> cp++;
> }
> __builtin_strncpy(buf, old, cp-old);
> if (cp != old) {
> buf[0] = 'Q';
> }
> if (cp && *cp) {
> buf[0] = 'Q';
> }
> }
>
> int main(void) {
> add_name(0);
> return 0;
> }
>
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