.
Thread 3 (Thread 10461):
#0  0x0022e416 in __kernel_vsyscall ()
No symbol table info available.
#1  0x00e25f46 in __poll (fds=0x218df9f0, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:87
        resultvar = <value optimized out>
        oldtype = -516
        result = <value optimized out>
#2  0x0028067b in g_poll (fds=0x218df9f0, nfds=1, timeout=-1) at /build/buildd/glib2.0-2.29.10/./glib/gpoll.c:132
No locals.
#3  0x00271b86 in g_main_context_poll (context=0x218da908, block=2623056, dispatch=1, self=<value optimized out>) at /build/buildd/glib2.0-2.29.10/./glib/gmain.c:3437
        poll_func = 0x280650 <g_poll>
#4  g_main_context_iterate (context=0x218da908, block=2623056, dispatch=1, self=<value optimized out>) at /build/buildd/glib2.0-2.29.10/./glib/gmain.c:3119
        max_priority = 2147483647
        timeout = -1
        some_ready = <value optimized out>
        nfds = 1
        allocated_nfds = <value optimized out>
        fds = 0x218df9f0
#5  0x0027228b in g_main_loop_run (loop=0x218eb710) at /build/buildd/glib2.0-2.29.10/./glib/gmain.c:3332
        __PRETTY_FUNCTION__ = "g_main_loop_run"
#6  0x0558c294 in dconf_context_thread (data=0x218da908) at dconfcontext.c:11
        context = 0x218da908
        loop = <value optimized out>
        __PRETTY_FUNCTION__ = "dconf_context_thread"
#7  0x00298934 in g_thread_create_proxy (data=0x218af518) at /build/buildd/glib2.0-2.29.10/./glib/gthread.c:1954
        thread = 0x218af518
        __PRETTY_FUNCTION__ = "g_thread_create_proxy"
#8  0x003e8e99 in start_thread (arg=0xb16ffb70) at pthread_create.c:304
        pd = 0xb16ffb70
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {4169716, 0, 4001536, -1318063352, 729109018, -1987198600}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = <value optimized out>
        robust = <value optimized out>
        pagesize_m1 = <value optimized out>
        sp = <value optimized out>
        freesize = <value optimized out>
        __PRETTY_FUNCTION__ = "start_thread"
#9  0x00e346de in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:130
No locals.
.
Thread 2 (Thread 10458):
#0  0x0022e416 in __kernel_vsyscall ()
No symbol table info available.
#1  0x00e25f46 in __poll (fds=0xbfa80f58, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:87
        resultvar = <value optimized out>
        oldtype = -516
        result = <value optimized out>
#2  0x004b1000 in _xcb_conn_wait (c=0x21737090, cond=0xbfa80fcc, vector=0x0, count=0x0) at ../../src/xcb_conn.c:313
        ret = <value optimized out>
        fd = {fd = 3, events = 1, revents = 0}
#3  0x004b2930 in xcb_wait_for_reply (c=0x21737090, request=879, e=0xbfa8104c) at ../../src/xcb_in.c:378
        cond = {__data = {__lock = 0, __futex = 0, __total_seq = 0, __wakeup_seq = 0, __woken_seq = 0, __mutex = 0x0, __nwaiters = 0, __broadcast_seq = 0}, __size = '\000' <repeats 47 times>, __align = 0}
        reader = {request = 879, data = 0xbfa80fcc, next = 0x0}
        prev_reader = <value optimized out>
        widened_request = <value optimized out>
        ret = 0x0
#4  0x0102b542 in _XReply (dpy=0x21736748, rep=0xbfa81090, extra=0, discard=0) at ../../src/xcb_io.c:541
        req = 0x21acf048
        response = <value optimized out>
        error = 0x0
        c = 0x21737090
        reply = <value optimized out>
        current = 0x21acf3b0
        __PRETTY_FUNCTION__ = "_XReply"
#5  0x010102b8 in XGetWindowProperty (dpy=0x21736748, w=50331815, property=311, offset=0, length=2147483647, delete=0, req_type=6, actual_type=0xbfa8113c, actual_format=0xbfa81140, nitems=0xbfa81144, bytesafter=0xbfa81148, prop=0xbfa8114c) at ../../src/GetProp.c:61
        reply = {type = 244 '\364', format = 79 'O', sequenceNumber = 61, length = 561256448, propertyType = 0, bytesAfter = 1627444, nItems = 561256448, pad1 = 561184888, pad2 = 564881280, pad3 = 3734860}
        req = <value optimized out>
        error = {type = 0 '\000', errorCode = 0 '\000', sequenceNumber = 880, resourceID = 0, minorCode = 0, majorCode = 0 '\000', pad1 = 0 '\000', pad3 = 0, pad4 = 0, pad5 = 0, pad6 = 0, pad7 = 0}
#6  0x00364399 in gdk_check_wm_desktop_changed (window=0x21a66bf0) at /build/buildd/gtk+3.0-3.1.8/./gdk/x11/gdkdisplay-x11.c:260
        toplevel = 0x21ab6780
        display = 0x21741800
        type = 0
        format = 561256448
        nitems = 3215463068
        bytes_after = 311
        data = <value optimized out>
        desktop = <value optimized out>
#7  0x003935d0 in gdk_x11_display_translate_event (translator=0x21741800, display=0x21741800, event=0x21ac6668, xevent=0xbfa8129c) at /build/buildd/gtk+3.0-3.1.8/./gdk/x11/gdkdisplay-x11.c:774
        window_impl = <value optimized out>
        screen = 0x3bcece
        x11_screen = <value optimized out>
        toplevel = <value optimized out>
        display_x11 = 0x21741800
        return_val = 1
        xwindow = <value optimized out>
#8  0x0039be55 in _gdk_x11_event_translator_translate (translator=0x21741800, display=0x21741800, xevent=0xbfa8129c) at /build/buildd/gtk+3.0-3.1.8/./gdk/x11/gdkeventtranslator.c:53
        iface = 0x2172af18
        event = 0x21ac6668
        __PRETTY_FUNCTION__ = "_gdk_x11_event_translator_translate"
#9  0x0039b900 in gdk_event_source_translate_event (display=0x21741800) at /build/buildd/gtk+3.0-3.1.8/./gdk/x11/gdkeventsource.c:242
        translator = <value optimized out>
        list = 0x21732390
        filter_window = 0x21732390
        dpy = 0x21736748
        event = <value optimized out>
        result = <value optimized out>
        event_translator = <value optimized out>
#10 _gdk_x11_display_queue_events (display=0x21741800) at /build/buildd/gtk+3.0-3.1.8/./gdk/x11/gdkeventsource.c:334
        event = 0x0
        xevent = {type = 28, xany = {type = 28, serial = 876, send_event = 0, display = 0x21736748, window = 50331815}, xkey = {type = 28, serial = 876, send_event = 0, display = 0x21736748, window = 50331815, root = 311, subwindow = 12347673, time = 0, x = 858927429, y = 892548148, x_root = 8754, y_root = 0, state = 4, keycode = 0, same_screen = 0}, xbutton = {type = 28, serial = 876, send_event = 0, display = 0x21736748, window = 50331815, root = 311, subwindow = 12347673, time = 0, x = 858927429, y = 892548148, x_root = 8754, y_root = 0, state = 4, button = 0, same_screen = 0}, xmotion = {type = 28, serial = 876, send_event = 0, display = 0x21736748, window = 50331815, root = 311, subwindow = 12347673, time = 0, x = 858927429, y = 892548148, x_root = 8754, y_root = 0, state = 4, is_hint = 0 '\000', same_screen = 0}, xcrossing = {type = 28, serial = 876, send_event = 0, display = 0x21736748, window = 50331815, root = 311, subwindow = 12347673, time = 0, x = 858927429, y = 892548148, x_root = 8754, y_root = 0, mode = 4, detail = 0, same_screen = 0, focus = 0, state = 0}, xfocus = {type = 28, serial = 876, send_event = 0, display = 0x21736748, window = 50331815, mode = 311, detail = 12347673}, xexpose = {type = 28, serial = 876, send_event = 0, display = 0x21736748, window = 50331815, x = 311, y = 12347673, width = 0, height = 858927429, count = 892548148}, xgraphicsexpose = {type = 28, serial = 876, send_event = 0, display = 0x21736748, drawable = 50331815, x = 311, y = 12347673, width = 0, height = 858927429, count = 892548148, major_code = 8754, minor_code = 0}, xnoexpose = {type = 28, serial = 876, send_event = 0, display = 0x21736748, drawable = 50331815, major_code = 311, minor_code = 12347673}, xvisibility = {type = 28, serial = 876, send_event = 0, display = 0x21736748, window = 50331815, state = 311}, xcreatewindow = {type = 28, serial = 876, send_event = 0, display = 0x21736748, parent = 50331815, window = 311, x = 12347673, y = 0, width = 858927429, height = 892548148, border_width = 8754, override_redirect = 0}, xdestroywindow = {type = 28, serial = 876, send_event = 0, display = 0x21736748, event = 50331815, window = 311}, xunmap = {type = 28, serial = 876, send_event = 0, display = 0x21736748, event = 50331815, window = 311, from_configure = 12347673}, xmap = {type = 28, serial = 876, send_event = 0, display = 0x21736748, event = 50331815, window = 311, override_redirect = 12347673}, xmaprequest = {type = 28, serial = 876, send_event = 0, display = 0x21736748, parent = 50331815, window = 311}, xreparent = {type = 28, serial = 876, send_event = 0, display = 0x21736748, event = 50331815, window = 311, parent = 12347673, x = 0, y = 858927429, override_redirect = 892548148}, xconfigure = {type = 28, serial = 876, send_event = 0, display = 0x21736748, event = 50331815, window = 311, x = 12347673, y = 0, width = 858927429, height = 892548148, border_width = 8754, above = 0, override_redirect = 4}, xgravity = {type = 28, serial = 876, send_event = 0, display = 0x21736748, event = 50331815, window = 311, x = 12347673, y = 0}, xresizerequest = {type = 28, serial = 876, send_event = 0, display = 0x21736748, window = 50331815, width = 311, height = 12347673}, xconfigurerequest = {type = 28, serial = 876, send_event = 0, display = 0x21736748, parent = 50331815, window = 311, x = 12347673, y = 0, width = 858927429, height = 892548148, border_width = 8754, above = 0, detail = 4, value_mask = 0}, xcirculate = {type = 28, serial = 876, send_event = 0, display = 0x21736748, event = 50331815, window = 311, place = 12347673}, xcirculaterequest = {type = 28, serial = 876, send_event = 0, display = 0x21736748, parent = 50331815, window = 311, place = 12347673}, xproperty = {type = 28, serial = 876, send_event = 0, display = 0x21736748, window = 50331815, atom = 311, time = 12347673, state = 0}, xselectionclear = {type = 28, serial = 876, send_event = 0, display = 0x21736748, window = 50331815, selection = 311, time = 12347673}, xselectionrequest = {type = 28, serial = 876, send_event = 0, display = 0x21736748, owner = 50331815, requestor = 311, selection = 12347673, target = 0, property = 858927429, time = 892548148}, xselection = {type = 28, serial = 876, send_event = 0, display = 0x21736748, requestor = 50331815, selection = 311, target = 12347673, property = 0, time = 858927429}, xcolormap = {type = 28, serial = 876, send_event = 0, display = 0x21736748, window = 50331815, colormap = 311, new = 12347673, state = 0}, xclient = {type = 28, serial = 876, send_event = 0, display = 0x21736748, window = 50331815, message_type = 311, format = 12347673, data = {b = "\000\000\000\000E12344352\"\000\000\000\000\000", s = {0, 0, 12613, 13106, 13364, 13619, 8754, 0, 0, 0}, l = {0, 858927429, 892548148, 8754, 0}}}, xmapping = {type = 28, serial = 876, send_event = 0, display = 0x21736748, window = 50331815, request = 311, first_keycode = 12347673, count = 0}, xerror = {type = 28, display = 0x36c, resourceid = 0, serial = 561211208, error_code = 167 '\247', request_code = 0 '\000', minor_code = 0 '\000'}, xkeymap = {type = 28, serial = 876, send_event = 0, display = 0x21736748, window = 50331815, key_vector = "7\001\000\000\031i\274\000\000\000\000\000E12344352\"\000\000\000\000\000\000\004\000\000"}, xgeneric = {type = 28, serial = 876, send_event = 0, display = 0x21736748, extension = 50331815, evtype = 311}, xcookie = {type = 28, serial = 876, send_event = 0, display = 0x21736748, extension = 50331815, evtype = 311, cookie = 12347673, data = 0x0}, pad = {28, 876, 0, 561211208, 50331815, 311, 12347673, 0, 858927429, 892548148, 8754, 0, 4, 0, 0, 0, 0, 136, 41, 15479824, 15479824, 0, 0, 0}}
        xdisplay = 0x21736748
        event_source = 0x217499c0
        display_x11 = <value optimized out>
#11 0x0036ad5e in gdk_display_get_event (display=0x21741800) at /build/buildd/gtk+3.0-3.1.8/./gdk/gdkdisplay.c:311
        __PRETTY_FUNCTION__ = "gdk_display_get_event"
#12 0x0039b36a in gdk_event_source_dispatch (source=0x217499c0, callback=0, user_data=0x0) at /build/buildd/gtk+3.0-3.1.8/./gdk/x11/gdkeventsource.c:356
        display = 0x21741800
        event = <value optimized out>
#13 0x0027154f in g_main_dispatch (context=0x21731fe0) at /build/buildd/glib2.0-2.29.10/./glib/gmain.c:2473
        dispatch = 0x39b340 <gdk_event_source_dispatch>
        was_in_call = 0
        user_data = 0x0
        callback = 0
        cb_funcs = 0x0
        cb_data = 0x0
        current_source_link = {data = 0x217499c0, next = 0x0}
        need_destroy = <value optimized out>
        source = 0x217499c0
        current = 0x21834758
        i = <value optimized out>
#14 g_main_context_dispatch (context=0x21731fe0) at /build/buildd/glib2.0-2.29.10/./glib/gmain.c:3046
No locals.
#15 0x00271c80 in g_main_context_iterate (context=0x21731fe0, block=2623056, dispatch=1, self=<value optimized out>) at /build/buildd/glib2.0-2.29.10/./glib/gmain.c:3124
        max_priority = 0
        timeout = 0
        some_ready = 1
        nfds = <value optimized out>
        allocated_nfds = <value optimized out>
        fds = 0x218ca408
#16 0x0027228b in g_main_loop_run (loop=0x2188b5c0) at /build/buildd/glib2.0-2.29.10/./glib/gmain.c:3332
        __PRETTY_FUNCTION__ = "g_main_loop_run"
#17 0x00691a45 in gtk_main () at /build/buildd/gtk+3.0-3.1.8/./gtk/gtkmain.c:1362
        loop = 0x2188b5c0
#18 0x00594424 in gtk_application_run_mainloop (application=0x21835de8) at /build/buildd/gtk+3.0-3.1.8/./gtk/gtkapplication.c:112
No locals.
#19 0x00a8b4ac in g_application_run (application=0x21835de8, argc=2, argv=0xbfa815e4) at /build/buildd/glib2.0-2.29.10/./gio/gapplication.c:1325
        arguments = 0x2188b5c0
        status = 0
        i = <value optimized out>
        __PRETTY_FUNCTION__ = "g_application_run"
#20 0x004a09b8 in main (argc=2, argv=0xbfa815e4) at control-center.c:193
        shell = <value optimized out>
        application = 0x21835de8
        status = <value optimized out>
.
Thread 1 (Thread 10460):
#0  0x0022e416 in __kernel_vsyscall ()
No symbol table info available.
#1  0x00d8edd1 in raise (sig=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:64
        resultvar = <value optimized out>
        resultvar = <value optimized out>
        pid = 15474676
        selftid = 10460
#2  0x00d922ae in abort () at abort.c:92
        save_stage = 2
        act = {__sigaction_handler = {sa_handler = 0x232558, sa_sigaction = 0x232558}, sa_mask = {__val = {2986880052, 13224564, 0, 3077626384, 5, 0, 1, 3077666952, 1, 8, 3272692, 2977030152, 2977024336, 2588747, 2977030152, 2986880140, 4, 3272692, 0, 0, 2986880128, 2589206, 3077666952, 2343512, 3077660672, 14486597, 3272692, 3272692, 174, 2712782, 2977030152, 0}}, sa_flags = -1308087156, sa_restorer = 0x4}
        sigs = {__val = {32, 0 <repeats 31 times>}}
#3  0x00296a0e in g_assertion_message (domain=0x2b9d06 "GLib", file=0x3021a8 "/build/buildd/glib2.0-2.29.10/./glib/gvarianttypeinfo.c", line=172, func=0x3023f0 "g_variant_type_info_check", message=<value optimized out>) at /build/buildd/glib2.0-2.29.10/./glib/gtestutils.c:1425
        lstr = "172\000\250\267\210!\000\000\000\000 8\254!p\021p\261\364\357\061\000PP\254!\364\357\061"
        s = 0xb171c950 "@"
#4  0x00296e81 in g_assertion_message_cmpnum (domain=0x2b9d06 "GLib", file=0x3021a8 "/build/buildd/glib2.0-2.29.10/./glib/gvarianttypeinfo.c", line=172, func=0x3023f0 "g_variant_type_info_check", expr=0x302157 "container->ref_count > 0", arg1=0, cmp=0x2bad42 ">", arg2=0, numtype=105 'i') at /build/buildd/glib2.0-2.29.10/./glib/gtestutils.c:1459
        s = <value optimized out>
#5  0x002b4561 in g_variant_type_info_check (info=<value optimized out>, container_class=<value optimized out>) at /build/buildd/glib2.0-2.29.10/./glib/gvarianttypeinfo.c:172
        __n1 = 0
        __n2 = 0
        container = <value optimized out>
        __PRETTY_FUNCTION__ = "g_variant_type_info_check"
#6  0x002b4ca7 in g_variant_type_info_unref (info=0x21ac8ee0) at /build/buildd/glib2.0-2.29.10/./glib/gvarianttypeinfo.c:831
No locals.
#7  0x002ae04a in g_variant_unref (value=0x21ac77b0) at /build/buildd/glib2.0-2.29.10/./glib/gvariant-core.c:625
No locals.
#8  0x00aad40f in g_dbus_message_finalize (object=0x219898f0) at /build/buildd/glib2.0-2.29.10/./gio/gdbusmessage.c:125
        message = 0x219898f0
#9  0x001696ba in g_object_unref (_object=0x219898f0) at /build/buildd/glib2.0-2.29.10/./gobject/gobject.c:2746
        object = 0x219898f0
        old_ref = <value optimized out>
        __PRETTY_FUNCTION__ = "g_object_unref"
#10 0x00ab85b3 in message_to_write_data_free (data=0x21ac6f98) at /build/buildd/glib2.0-2.29.10/./gio/gdbusprivate.c:828
No locals.
#11 0x00aba2fe in write_message_cb (source_object=0x0, res=0x21ac5050, user_data=0x21ac6f98) at /build/buildd/glib2.0-2.29.10/./gio/gdbusprivate.c:1218
        data = 0x21ac6f98
        error = 0x0
#12 0x00a590e2 in g_simple_async_result_complete (simple=0x21ac5050) at /build/buildd/glib2.0-2.29.10/./gio/gsimpleasyncresult.c:749
        current_source = <value optimized out>
        current_context = <value optimized out>
        __PRETTY_FUNCTION__ = "g_simple_async_result_complete"
#13 0x00ab9ad3 in write_message_continue_writing (data=<value optimized out>) at /build/buildd/glib2.0-2.29.10/./gio/gdbusprivate.c:1009
        ostream = <value optimized out>
        simple = 0x21ac5050
        fd_list = 0x0
        __PRETTY_FUNCTION__ = "write_message_continue_writing"
#14 0x00ab9f3f in maybe_write_next_message (worker=0x2190fa28) at /build/buildd/glib2.0-2.29.10/./gio/gdbusprivate.c:1291
        old_message = <value optimized out>
        new_blob = <value optimized out>
        new_blob_size = 3272692
        error = 0x299df2
        data = 0x21ac6f98
#15 0x00aba065 in write_message_in_idle_cb (user_data=0x2190fa28) at /build/buildd/glib2.0-2.29.10/./gio/gdbusprivate.c:1304
No locals.
#16 write_message_in_idle_cb (user_data=0x2190fa28) at /build/buildd/glib2.0-2.29.10/./gio/gdbusprivate.c:1300
        worker = 0x2190fa28
#17 0x0026d370 in g_idle_dispatch (source=0x21ac74d0, callback=0xaba040 <write_message_in_idle_cb>, user_data=0x2190fa28) at /build/buildd/glib2.0-2.29.10/./glib/gmain.c:4822
No locals.
#18 0x0027154f in g_main_dispatch (context=0x2188b708) at /build/buildd/glib2.0-2.29.10/./glib/gmain.c:2473
        dispatch = 0x26d350 <g_idle_dispatch>
        was_in_call = 0
        user_data = 0x2190fa28
        callback = 0xaba040 <write_message_in_idle_cb>
        cb_funcs = 0x31f35c
        cb_data = 0x21ac7e30
        current_source_link = {data = 0x21ac74d0, next = 0x0}
        need_destroy = <value optimized out>
        source = 0x21ac74d0
        current = 0x21834888
        i = <value optimized out>
#19 g_main_context_dispatch (context=0x2188b708) at /build/buildd/glib2.0-2.29.10/./glib/gmain.c:3046
No locals.
#20 0x00271c80 in g_main_context_iterate (context=0x2188b708, block=2623056, dispatch=1, self=<value optimized out>) at /build/buildd/glib2.0-2.29.10/./glib/gmain.c:3124
        max_priority = 2147483647
        timeout = -1
        some_ready = 1
        nfds = <value optimized out>
        allocated_nfds = <value optimized out>
        fds = 0x218ea7e0
#21 0x0027228b in g_main_loop_run (loop=0x218aaf50) at /build/buildd/glib2.0-2.29.10/./glib/gmain.c:3332
        __PRETTY_FUNCTION__ = "g_main_loop_run"
#22 0x00ab7eba in gdbus_shared_thread_func (user_data=0x218aafa8) at /build/buildd/glib2.0-2.29.10/./gio/gdbusprivate.c:276
        data = 0x218aafa8
#23 0x00298934 in g_thread_create_proxy (data=0x2188b798) at /build/buildd/glib2.0-2.29.10/./glib/gthread.c:1954
        thread = 0x2188b798
        __PRETTY_FUNCTION__ = "g_thread_create_proxy"
#24 0x003e8e99 in start_thread (arg=0xb2083b70) at pthread_create.c:304
        pd = 0xb2083b70
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {4169716, 0, 4001536, -1308085496, -453684708, -1987198600}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = <value optimized out>
        robust = <value optimized out>
        pagesize_m1 = <value optimized out>
        sp = <value optimized out>
        freesize = <value optimized out>
        __PRETTY_FUNCTION__ = "start_thread"
#25 0x00e346de in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:130
No locals.