http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54365
--- Comment #8 from Florian Weimer <fweimer at redhat dot com> 2012-08-30 13:56:04 UTC --- (In reply to comment #7) > This is not surprising, just use integer arithmetic instead of pointer > arithmetic. Pointer arithmetic not only has undefined wrapping, it is defined > only within the bounds of the object it points into (or one past the last byte > in it, but you can't dereference it in that case). I was hoping that -fwrapv would turn pointer arithmetic into pure address arithmetic as well. The -fwrapv documentation only mentions integer arithmetic so this is not a bug, it's just ... surprising.
