__assert_fail_base (fmt=0x7f9c8340f578 "%s%s%s:%u: %s%sAssertion `%s' failed.\n%n", assertion=assertion@entry=0x7f9c82de5da4 "!xcb_xlib_unknown_req_pending", file=file@entry=0x7f9c82de5d52 "../../src/xcb_io.c", line=line@entry=164, function=function@entry=0x7f9c82de5ea0 <__PRETTY_FUNCTION__.14315> "append_pending_request") at assert.c:92
__GI___assert_fail (assertion=assertion@entry=0x7f9c82de5da4 "!xcb_xlib_unknown_req_pending", file=file@entry=0x7f9c82de5d52 "../../src/xcb_io.c", line=line@entry=164, function=function@entry=0x7f9c82de5ea0 <__PRETTY_FUNCTION__.14315> "append_pending_request") at assert.c:101
append_pending_request (dpy=dpy@entry=0x240e6b0, sequence=4770) at ../../src/xcb_io.c:162
_XReply (dpy=dpy@entry=0x240e6b0, rep=rep@entry=0x7fff868afe40, extra=extra@entry=0, discard=discard@entry=1) at ../../src/xcb_io.c:584
XQueryExtension (dpy=dpy@entry=0x240e6b0, name=name@entry=0x7f9c76e05e52 "ConfigSGIX", major_opcode=major_opcode@entry=0x7fff868afea4, first_event=first_event@entry=0x7fff868afea8, first_error=first_error@entry=0x7fff868afeac) at ../../src/QuExt.c:48