Comment 2 for bug 1248539

StacktraceTop:
 __GI_raise (sig=sig@entry=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:56
 __GI_abort () at abort.c:90
 __assert_fail_base (fmt=0x7ffeedb56f58 "%s%s%s:%u: %s%sAssertion `%s' failed.\n%n", assertion=assertion@entry=0x7ffee762d7e8 "!xcb_xlib_too_much_data_requested", file=file@entry=0x7ffee762d39b "../../src/xcb_io.c", line=line@entry=736, function=function@entry=0x7ffee762d810 <__PRETTY_FUNCTION__.14499> "_XRead") at assert.c:92
 __GI___assert_fail (assertion=assertion@entry=0x7ffee762d7e8 "!xcb_xlib_too_much_data_requested", file=file@entry=0x7ffee762d39b "../../src/xcb_io.c", line=line@entry=736, function=function@entry=0x7ffee762d810 <__PRETTY_FUNCTION__.14499> "_XRead") at assert.c:101
 _XRead (dpy=0x14779b0, data=data@entry=0x7ffeb80456f0 "\270\005", size=<optimized out>) at ../../src/xcb_io.c:735