On Mon, Aug 11, 2014 at 11:49:16AM -0700, Petr Vandrovec wrote: > Hi, > it seems to be gcc bug. For inexplicable reason compiler optimized > 'if (cp && *cp)' to just 'if (*cp)' :-(
> Changing 'char *cp' to 'char * volatile cp' at line 468 in > support/export/client.c is enough to explain to gcc that it has no > idea what it is doing, and fixes the crash. > I think that after code does 'strncpy(new, old, cp-old)' or > 'new[cp-old] = 0' or 'if (cp != old && *cp)' compiler believes 'cp' > cannot be NULL, forgetting that both 'cp' and 'old' could have been > NULL, making these expressions valid for NULL cp. Are you seeing this problem on i386 (like the original submitter), or do you see this problem on a different architecture? (If it's a compiler problem, this will be relevant to getting it fixed properly.) -- Steve Langasek Give me a lever long enough and a Free OS Debian Developer to set it on, and I can move the world. Ubuntu Developer http://www.debian.org/ slanga...@ubuntu.com vor...@debian.org
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