#0  0x00007f8584be6241 in _g_log_abort () from /tmp/apport_sandbox_RFlcFX/lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f8584be7297 in g_log_default_handler () from /tmp/apport_sandbox_RFlcFX/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f8584be75a4 in g_logv () from /tmp/apport_sandbox_RFlcFX/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f8584be77af in g_log () from /tmp/apport_sandbox_RFlcFX/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f85864baf78 in _gdk_x11_display_error_event (display=display@entry=0x556f34cfb020, error=error@entry=0x7ffca36781e0) at ././gdk/x11/gdkdisplay-x11.c:2576
  [Error: gdkdisplay-x11.c was not found in source tree]
#5  0x00007f85864c71e3 in gdk_x_error (xdisplay=0x556f34ceed40, error=0x7ffca36781e0) at ././gdk/x11/gdkmain-x11.c:307
  [Error: gdkmain-x11.c was not found in source tree]
#6  0x00007f8584691c2d in _XError (dpy=dpy@entry=0x556f34ceed40, rep=rep@entry=0x556f34e620f0) at ../../src/XlibInt.c:1429
  [Error: XlibInt.c was not found in source tree]
#7  0x00007f858468eab7 in handle_error (dpy=0x556f34ceed40, err=0x556f34e620f0, in_XReply=<optimized out>) at ../../src/xcb_io.c:213
  [Error: xcb_io.c was not found in source tree]
#8  0x00007f858468eb75 in handle_response (dpy=dpy@entry=0x556f34ceed40, response=0x556f34e620f0, in_XReply=in_XReply@entry=1) at ../../src/xcb_io.c:325
  [Error: xcb_io.c was not found in source tree]
#9  0x00007f858468fb30 in _XReply (dpy=dpy@entry=0x556f34ceed40, rep=rep@entry=0x7ffca36783f0, extra=extra@entry=0, discard=discard@entry=1) at ../../src/xcb_io.c:627
  [Error: xcb_io.c was not found in source tree]
#10 0x00007f85846764e7 in _XGetWindowAttributes (dpy=dpy@entry=0x556f34ceed40, w=62915477, attr=0x7ffca3678490) at ../../src/GetWAttrs.c:114
  [Error: GetWAttrs.c was not found in source tree]
#11 0x00007f8584676671 in XGetWindowAttributes (dpy=0x556f34ceed40, w=<optimized out>, attr=attr@entry=0x7ffca3678490) at ../../src/GetWAttrs.c:149
  [Error: GetWAttrs.c was not found in source tree]
#12 0x0000556f334303ea in meta_group_new (display=0x556f34f66c00, group_leader=<optimized out>) at core/group.c:48
  43:   group->display = display;
  44:   group->windows = NULL;
  45:   group->group_leader = group_leader;
  46:   group->refcount = 1; /* owned by caller, hash table has only weak ref */
  47: 
  48:   XGetWindowAttributes (display->xdisplay, group_leader, &attrs);
  49:   XSelectInput (display->xdisplay, group_leader,
  50:                 attrs.your_event_mask | PropertyChangeMask);
  51: 
  52:   if (display->groups_by_leader == NULL)
  53:     display->groups_by_leader = g_hash_table_new (meta_unsigned_long_hash,
#13 0x0000556f33430737 in meta_window_compute_group (window=window@entry=0x556f351a8eb0) at core/group.c:159
  154:                                 ancestor->xgroup_leader);
  155:       else if (window->xgroup_leader != None)
  156:         group = meta_group_new (window->display,
  157:                                 window->xgroup_leader);
  158:       else
  159:         group = meta_group_new (window->display,
  160:                                 window->xwindow);
  161: 
  162:       window->group = group;
  163:     }
  164: 
#14 0x0000556f334307b2 in meta_window_group_leader_changed (window=window@entry=0x556f351a8eb0) at core/group.c:194
  189: 
  190: void
  191: meta_window_group_leader_changed (MetaWindow *window)
  192: {
  193:   remove_window_from_group (window);
  194:   meta_window_compute_group (window);
  195: }
  196: 
  197: void
  198: meta_window_shutdown_group (MetaWindow *window)
  199: {
#15 0x0000556f33441af1 in reload_wm_hints (window=0x556f351a8eb0, value=<optimized out>, initial=<optimized out>) at core/window-props.c:1565
  1560:   if (window->xgroup_leader != old_group_leader)
  1561:     {
  1562:       meta_verbose ("Window %s changed its group leader to 0x%lx\n",
  1563:                     window->desc, window->xgroup_leader);
  1564: 
  1565:       meta_window_group_leader_changed (window);
  1566:     }
  1567: 
  1568:   meta_icon_cache_property_changed (&window->icon_cache,
  1569:                                     window->display,
  1570:                                     XA_WM_HINTS);
#16 0x0000556f334428d8 in reload_prop_value (initial=0, value=0x7ffca36785a0, hooks=0x556f34deff60, window=0x556f351a8eb0) at core/window-props.c:197
  192:                    MetaWindowPropHooks *hooks,
  193:                    MetaPropValue       *value,
  194:                    gboolean             initial)
  195: {
  196:   if (hooks && hooks->reload_func != NULL)
  197:     (* hooks->reload_func) (window, value, initial);
  198: }
  199: 
  200: static void
  201: reload_wm_client_machine (MetaWindow    *window,
  202:                           MetaPropValue *value,
#17 meta_window_reload_property_from_xwindow (window=window@entry=0x556f351a8eb0, xwindow=xwindow@entry=62915477, property=<optimized out>, initial=initial@entry=0) at core/window-props.c:110
  105:   init_prop_value (window, hooks, &value);
  106: 
  107:   meta_prop_get_values (window->display, xwindow,
  108:                         &value, 1);
  109: 
  110:   reload_prop_value (window, hooks, &value,
  111:                      initial);
  112: 
  113:   meta_prop_free_values (&value, 1);
  114: }
  115: 
#18 0x0000556f33445f79 in process_property_notify (event=0x7ffca36788b0, window=0x556f351a8eb0) at core/window.c:5770
  5765:       window->user_time_window)
  5766:     {
  5767:       xid = window->user_time_window;
  5768:     }
  5769: 
  5770:   meta_window_reload_property_from_xwindow (window, xid, event->atom, FALSE);
  5771: 
  5772:   return TRUE;
  5773: }
  5774: 
  5775: static void
#19 meta_window_property_notify (window=window@entry=0x556f351a8eb0, event=event@entry=0x7ffca36788b0) at core/window.c:4993
  4988: 
  4989: gboolean
  4990: meta_window_property_notify (MetaWindow *window,
  4991:                              XEvent     *event)
  4992: {
  4993:   return process_property_notify (window, &event->xproperty);
  4994: }
  4995: 
  4996: #define _NET_WM_MOVERESIZE_SIZE_TOPLEFT      0
  4997: #define _NET_WM_MOVERESIZE_SIZE_TOP          1
  4998: #define _NET_WM_MOVERESIZE_SIZE_TOPRIGHT     2
#20 0x0000556f3342bcf3 in event_callback (event=0x7ffca36788b0, data=0x556f34f66c00) at core/display.c:2219
  2214:       {
  2215:         MetaGroup *group;
  2216:         MetaScreen *screen;
  2217: 
  2218:         if (window && !frame_was_receiver)
  2219:           meta_window_property_notify (window, event);
  2220:         else if (property_for_window && !frame_was_receiver)
  2221:           meta_window_property_notify (property_for_window, event);
  2222: 
  2223:         group = meta_display_lookup_group (display,
  2224:                                            event->xproperty.window);
#21 0x0000556f3345aa85 in filter_func (xevent=0x7ffca36788b0, event=<optimized out>, data=<optimized out>) at ui/ui.c:244
  239:              GdkEvent *event,
  240:              gpointer data)
  241: {
  242:   g_return_val_if_fail (ef != NULL, GDK_FILTER_CONTINUE);
  243: 
  244:   if ((* ef->func) (xevent, ef->data) ||
  245:       maybe_redirect_mouse_event (xevent))
  246:     return GDK_FILTER_REMOVE;
  247:   else
  248:     return GDK_FILTER_CONTINUE;
  249: }
#22 0x00007f85864c1a51 in gdk_event_apply_filters (xevent=xevent@entry=0x7ffca36788b0, event=event@entry=0x556f34ffb1e0, window=window@entry=0x0) at ././gdk/x11/gdkeventsource.c:79
  [Error: gdkeventsource.c was not found in source tree]
#23 0x00007f85864c1e29 in gdk_event_source_translate_event (xevent=0x7ffca36788b0, event_source=0x556f34d0a780) at ././gdk/x11/gdkeventsource.c:198
  [Error: gdkeventsource.c was not found in source tree]
#24 _gdk_x11_display_queue_events (display=0x556f34cfb020) at ././gdk/x11/gdkeventsource.c:341
  [Error: gdkeventsource.c was not found in source tree]
#25 0x00007f8586490e59 in gdk_display_get_event (display=display@entry=0x556f34cfb020) at ././gdk/gdkdisplay.c:396
  [Error: gdkdisplay.c was not found in source tree]
#26 0x00007f85864c1ac2 in gdk_event_source_dispatch (source=<optimized out>, callback=<optimized out>, user_data=<optimized out>) at ././gdk/x11/gdkeventsource.c:363
  [Error: gdkeventsource.c was not found in source tree]
#27 0x00007f8584be07d7 in g_main_context_dispatch () from /tmp/apport_sandbox_RFlcFX/lib/x86_64-linux-gnu/libglib-2.0.so.0
#28 0x00007f8584be0a40 in g_main_context_iterate.isra () from /tmp/apport_sandbox_RFlcFX/lib/x86_64-linux-gnu/libglib-2.0.so.0
#29 0x00007f8584be0d62 in g_main_loop_run () from /tmp/apport_sandbox_RFlcFX/lib/x86_64-linux-gnu/libglib-2.0.so.0
#30 0x0000556f33417702 in main (argc=<optimized out>, argv=<optimized out>) at core/main.c:481
  476:     meta_prefs_set_force_fullscreen (FALSE);
  477: 
  478:   if (!meta_display_open ())
  479:     meta_exit (META_EXIT_ERROR);
  480: 
  481:   g_main_loop_run (meta_main_loop);
  482: 
  483:   meta_finalize ();
  484: 
  485:   if (meta_restart_after_quit)
  486:     {