[arch-general] xcb_wait_for_reply () from /usr/lib/libxcb.so.1 causing kdesktop crash on x86_64 (is this an upstream issue?)

David C. Rankin drankinatty at suddenlinkmail.com
Sat Feb 19 14:18:34 EST 2011

On 02/19/2011 03:23 AM, Rémy Oudompheng wrote:
> On 2011/2/19 David C. Rankin <drankinatty at suddenlinkmail.com> wrote:
>> Guys,
>>  I have run into an issue that is only causing problems on x86_64. It looks
>> like libxcb. The kcrash file is here:
>> [2k]
>> http://www.3111skyline.com/dl/dt/trinity/errors/x86_64/kdesktop-1.kcrash
>>  I need to figure out if this is an upstream libxcb issue or possibly a package
>> issue. How do I figure this out?
> Hello,
> Your backtrace doesn't give any information: you might need to
> recompile xcb with debug symbols. Do you have messages in the console?
> It vaguely looks like a failed assertion, so giving more information
> about what events are actally happening around is also useful.
> Rémy.

Here is the kcrash with libxcb recompiled with !strip and 'export
CFLAGS="$CFLAGS -g"' and 'export CXXFLAGS="$CXXFLAGS -g"'


It fills in a few more blanks in the _xcb_ functions:

#10 0x00007f7c0725d460 in malloc () from /lib/libc.so.6
#11 0x00007f7c0379f91a in _xcb_in_read () from /usr/lib/libxcb.so.1
#12 0x00007f7c0379dbfa in _xcb_conn_wait () from /usr/lib/libxcb.so.1
#13 0x00007f7c0379f1af in xcb_wait_for_reply () from /usr/lib/libxcb.so.1
#14 0x00007f7c07aacafd in _XReply () from /usr/lib/libX11.so.6

Could this be further up in libc?

David C. Rankin, J.D.,P.E.

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