#0  0x00007fc207520c45 in raise (sig=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:64
        resultvar = 0
        pid = <value optimized out>
        selftid = 1173
#1  0x00007fc2075249f6 in abort () at abort.c:92
        save_stage = 2
        act = {__sigaction_handler = {sa_handler = 0xdd, sa_sigaction = 0xdd}, sa_mask = {__val = {140471324444910, 140471315554120, 140471324436794, 140735513944848, 140471323408306, 206158430232, 140735513944864, 140735513944640, 140471323319492, 206158430256, 140735513944888, 8699680, 176144, 8403328, 7310874250628181369, 140735513947120}}, sa_flags = 124053818, sa_restorer = 0x7fc206dd5b8b}
        sigs = {__val = {32, 0 <repeats 15 times>}}
#2  0x00007fc207519705 in __assert_fail (assertion=0x7fc206dd5e08 "(((long) (event_sequence) - (long) (dpy->request)) <= 0)", file=<value optimized out>, line=221, function=<value optimized out>) at assert.c:81
        buf = 0x84bf20 "gnome-settings-daemon: ../../src/xcb_io.c:221: poll_for_event: Assertion `(((long) (event_sequence) - (long) (dpy->request)) <= 0)' failed.\n"
#3  0x00007fc206d61fe1 in poll_for_event (dpy=0x674a50) at ../../src/xcb_io.c:221
        req = <value optimized out>
        event = <value optimized out>
        event_sequence = <value optimized out>
        __PRETTY_FUNCTION__ = "poll_for_event"
#4  0x00007fc206d62071 in poll_for_response (dpy=0x674a50) at ../../src/xcb_io.c:235
        response = 0x0
        error = 0x0
        req = <value optimized out>
        __PRETTY_FUNCTION__ = "poll_for_response"
#5  0x00007fc206d626fd in _XEventsQueued (dpy=0x674a50, mode=<value optimized out>) at ../../src/xcb_io.c:304
        response = <value optimized out>
#6  0x00007fc206d531fd in XPending (dpy=0x674a50) at ../../src/Pending.c:55
        ret_val = <value optimized out>
#7  0x00007fc2072b356a in gdk_event_source_prepare (source=<value optimized out>, timeout=<value optimized out>) at /build/buildd/gtk+3.0-3.1.6/./gdk/x11/gdkeventsource.c:282
        display = 0x681000
        retval = <value optimized out>
#8  0x00007fc2078d5df2 in g_main_context_prepare (context=0x690300, priority=0x7fff8a50e4c8) at /build/buildd/glib2.0-2.29.8/./glib/gmain.c:2798
        result = <value optimized out>
        prepare = <value optimized out>
        source_timeout = -1
        i = <value optimized out>
        n_ready = <value optimized out>
        current_priority = <value optimized out>
        source = 0x6732c0
#9  0x00007fc2078d6bfd in g_main_context_iterate (context=0x690300, block=1, dispatch=1, self=<value optimized out>) at /build/buildd/glib2.0-2.29.8/./glib/gmain.c:3108
        max_priority = <value optimized out>
        timeout = <value optimized out>
        some_ready = <value optimized out>
        nfds = <value optimized out>
        allocated_nfds = 8
        fds = 0x7afc40
#10 0x00007fc2078d7592 in g_main_loop_run (loop=0x6f8b00) at /build/buildd/glib2.0-2.29.8/./glib/gmain.c:3336
        __PRETTY_FUNCTION__ = "g_main_loop_run"
#11 0x00007fc208aabdcd in gtk_main () at /build/buildd/gtk+3.0-3.1.6/./gtk/gtkmain.c:1363
        loop = 0x6f8b00
#12 0x00000000004036a2 in main (argc=1, argv=0x7fff8a50e668) at main.c:399
        res = <value optimized out>
        error = 0x0