[Xcb] [Bug 104769] libxcb-1.12: optimizations above -O1 causing multiple applications to stop working

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Sat Jan 27 10:11:35 UTC 2018


--- Comment #2 from Remi Denis-Courmont <courmisch at gmail.com> ---
(In reply to Uli Schlachter from comment #1)
> AFAIR this was already reported on the mailing list some years ago and the
> conclusion back then was "compiler bug". Any reason why you disagree with
> this? At least, changing the optimisation level to make a segfault go away
> sound like a compiler bug to me (or e.g. violation of aliasing rules, or
> something like that, but why would that be specific to 32 bit software?).

As such that could be a compiler bug, a library bug or an application bug.
Without any informations, I would actually argue that compiler bug is the least
likely of all three.

Without a source-level test case, it is almost impossible to say which is it.

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