Comment # 15 on bug 1205818 from Stefan Dirsch

(In reply to Michael Pujos from comment #10)
> vkquake is still crashing for me after compiling (using osc build) libX11-6
> and libX11-xcb1 from X11:XOrg / libX11 , and installing these packages.
> I verified in the build output that  --disable-thread-safety-constructor was
> present.
> 
> It crashes differently now:
> 
> vkquake: xcb_in.c:757: xcb_request_check: Assertion `!reply' failed.
> Aborted (core dumped):
> 
> 
>  #4  0x00007f9e26413c46 __assert_fail (libc.so.6 + 0x35c46)
>  #5  0x00007f9e2606b478 xcb_request_check (libxcb.so.1 + 0x10478)
>  #6  0x00007f9e1bdaba40 n/a (libvulkan_intel.so + 0x1aba40)
>  #7  0x00007f9e1bdac3f7 n/a (libvulkan_intel.so + 0x1ac3f7)
> 
> 
> 
> Although I had also seen this crash previously, along with the
> xcb_xlib_threads_sequence_lost one.

Hmm. Could be that this is a completely unrelated issue. I would try libX11
1.7.4. Best would be to git bisect the issue.