StacktraceTop: __assert_fail_base (fmt=0xbf2438 "%s%s%s:%u: %s%sAssertion `%s' failed.\n%n", assertion=0x1b01d3c "!xcb_xlib_unknown_req_pending", file=0x1b01cea "../../src/xcb_io.c", line=164, function=0x1b01de7 "append_pending_request") at assert.c:94 __GI___assert_fail (assertion=0x1b01d3c "!xcb_xlib_unknown_req_pending", file=0x1b01cea "../../src/xcb_io.c", line=164, function=0x1b01de7 "append_pending_request") at assert.c:103 append_pending_request (dpy=<optimized out>, sequence=189) at ../../src/xcb_io.c:162 _XReply (dpy=0x86fa780, rep=0xbfb565cc, extra=0, discard=1) at ../../src/xcb_io.c:584 XQueryExtension (dpy=0x86fa780, name=0xdf8728 "GLX", major_opcode=0xbfb56630, first_event=0xbfb56634, first_error=0xbfb56638) at ../../src/QuExt.c:48
StacktraceTop: unknown_ req_pending" , file=0x1b01cea "../../ src/xcb_ io.c", line=164, function=0x1b01de7 "append_ pending_ request" ) at assert.c:94 0x1b01d3c "!xcb_xlib_ unknown_ req_pending" , file=0x1b01cea "../../ src/xcb_ io.c", line=164, function=0x1b01de7 "append_ pending_ request" ) at assert.c:103 pending_ request (dpy=<optimized out>, sequence=189) at ../../src/ xcb_io. c:162 xcb_io. c:584 0xbfb56630, first_event= 0xbfb56634, first_error= 0xbfb56638) at ../../src/ QuExt.c: 48
__assert_fail_base (fmt=0xbf2438 "%s%s%s:%u: %s%sAssertion `%s' failed.\n%n", assertion=0x1b01d3c "!xcb_xlib_
__GI___assert_fail (assertion=
append_
_XReply (dpy=0x86fa780, rep=0xbfb565cc, extra=0, discard=1) at ../../src/
XQueryExtension (dpy=0x86fa780, name=0xdf8728 "GLX", major_opcode=