Comment # 8 on bug 1205818 from Michael Pujos

using latest libX11 v1.8.2m vkquake also has this issue, crashing between 2s
and 1min after starting a map:

[xcb] Unknown sequence number while processing queue
[xcb] You called XInitThreads, this is not your fault
[xcb] Aborting, sorry about that.
vkquake: xcb_io.c:278: poll_for_event: Assertion
`!xcb_xlib_threads_sequence_lost' failed.
Aborted (core dumped)


The coredump:

Stack trace of thread 5797:
                #0  0x00007f01a545a7ec __pthread_kill_implementation (libc.so.6
+ 0x907ec)
                #1  0x00007f01a5407816 raise (libc.so.6 + 0x3d816)
                #2  0x00007f01a53f081c abort (libc.so.6 + 0x2681c)
                #3  0x00007f01a53f072b __assert_fail_base.cold (libc.so.6 +
0x2672b)
                #4  0x00007f01a53ffc46 __assert_fail (libc.so.6 + 0x35c46)
                #5  0x00007f019ead7784 n/a (libX11.so.6 + 0x45784)
                #6  0x00007f019ead7846 n/a (libX11.so.6 + 0x45846)
                #7  0x00007f019eadb2aa _XEventsQueued (libX11.so.6 + 0x492aa)
                #8  0x00007f019eab7ee7 XCheckIfEvent (libX11.so.6 + 0x25ee7)
                #9  0x00007f01a56c28b5 n/a (libSDL2-2.0.so.0 + 0xfd8b5)
                #10 0x00007f01a5612e99 n/a (libSDL2-2.0.so.0 + 0x4de99)
                #11 0x00007f01a5613287 n/a (libSDL2-2.0.so.0 + 0x4e287)
                #12 0x0000562798b69538 n/a (vkquake + 0x8f538)



Is that a bug in libSDL2 xcb use that is now caught in libX11, or is it a bug
in libX11 xcb ?