Same backtrace as bz#1792576

#1 0x00007f3efe796a78 in __GI_abort () at abort.c:90
#2 0x00007f3efe78e1a6 in __assert_fail_base (fmt=0x7f3efe8e9d80 "%s%s%s:%u: %s%sAssertion `%s' failed.\n%n",
assertion=assertion@entry=0x7f3ee68ac580 "!xcb_xlib_threads_sequence_lost", file=file@entry=0x7f3ee68ac3f3 "xcb_io.c", line=line@entry=263,
function=function@entry=0x7f3ee68ac827 <_PRETTY_FUNCTION_.14864> "poll_for_event") at assert.c:92
#3 0x00007f3efe78e252 in _GI__assert_fail (assertion=assertion@entry=0x7f3ee68ac580 "!xcb_xlib_threads_sequence_lost",
file=file@entry=0x7f3ee68ac3f3 "xcb_io.c", line=line@entry=263, function=function@entry=0x7f3ee68ac827 <_PRETTY_FUNCTION_.14864> "poll_for_event")
at assert.c:101
#4 0x00007f3ee683a85a in poll_for_event (dpy=dpy@entry=0x1493800, queued_only=queued_only@entry=0) at xcb_io.c:260
#5 0x00007f3ee683a90c in poll_for_response (dpy=dpy@entry=0x1493800) at xcb_io.c:278
#6 0x00007f3ee683abfd in _XEventsQueued (dpy=0x1493800, mode=mode@entry=1) at xcb_io.c:362
#7 0x00007f3ee683aeae in _XFlush (dpy=<optimized out>) at xcb_io.c:518
...