#0  0x00007f312856fe37 in __GI_raise (sig=sig@entry=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:56
  [Error: ../nptl/sysdeps/unix/sysv/linux/raise.c was not found in source tree]
#1  0x00007f3128571528 in __GI_abort () at abort.c:89
  [Error: abort.c was not found in source tree]
#2  0x00007f3128b8bd95 in g_assertion_message (domain=domain@entry=0x7f312a4e91a0 "mutter", file=file@entry=0x7f312a4eb882 "core/window.c", line=line@entry=1323, func=func@entry=0x7f312a4ed940 <__FUNCTION__.78638> "meta_window_unmanage", message=message@entry=0x62853c0 "assertion failed: (window->display->focus_window != window)") at /build/buildd/glib2.0-2.43.3/./glib/gtestutils.c:2356
  [Error: /build/buildd/glib2.0-2.43.3/./glib/gtestutils.c was not found in source tree]
#3  0x00007f3128b8be2a in g_assertion_message_expr (domain=domain@entry=0x7f312a4e91a0 "mutter", file=file@entry=0x7f312a4eb882 "core/window.c", line=line@entry=1323, func=func@entry=0x7f312a4ed940 <__FUNCTION__.78638> "meta_window_unmanage", expr=expr@entry=0x7f312a4ec8e8 "window->display->focus_window != window") at /build/buildd/glib2.0-2.43.3/./glib/gtestutils.c:2371
  [Error: /build/buildd/glib2.0-2.43.3/./glib/gtestutils.c was not found in source tree]
#4  0x00007f312a4a098a in meta_window_unmanage (window=0x5a47a70, timestamp=43937965) at core/window.c:1323
  [Error: core/window.c was not found in source tree]
#5  0x00007f312a4bdf4e in handle_other_xevent (display=0x2931800, event=0x29e70ad) at x11/events.c:1306
  [Error: x11/events.c was not found in source tree]
#6  0x00007f312a4becb7 in meta_display_handle_xevent (event=0x7fff85985030, display=0x2931800) at x11/events.c:1733
  [Error: x11/events.c was not found in source tree]
#7  xevent_filter (xevent=0x7fff85985030, event=<optimized out>, data=0x2931800) at x11/events.c:1772
  [Error: x11/events.c was not found in source tree]
#8  0x00007f31255ec991 in gdk_event_apply_filters (xevent=xevent@entry=0x7fff85985030, event=event@entry=0x690d2d0, window=window@entry=0x0) at /build/buildd/gtk+3.0-3.14.8/./gdk/x11/gdkeventsource.c:81
  [Error: /build/buildd/gtk+3.0-3.14.8/./gdk/x11/gdkeventsource.c was not found in source tree]
#9  0x00007f31255ecc51 in gdk_event_source_translate_event (xevent=0x7fff85985030, event_source=0x26a0160) at /build/buildd/gtk+3.0-3.14.8/./gdk/x11/gdkeventsource.c:195
  [Error: /build/buildd/gtk+3.0-3.14.8/./gdk/x11/gdkeventsource.c was not found in source tree]
#10 _gdk_x11_display_queue_events (display=0x269e040) at /build/buildd/gtk+3.0-3.14.8/./gdk/x11/gdkeventsource.c:338
  [Error: /build/buildd/gtk+3.0-3.14.8/./gdk/x11/gdkeventsource.c was not found in source tree]
#11 0x00007f31255c3749 in gdk_display_get_event (display=display@entry=0x269e040) at /build/buildd/gtk+3.0-3.14.8/./gdk/gdkdisplay.c:336
  [Error: /build/buildd/gtk+3.0-3.14.8/./gdk/gdkdisplay.c was not found in source tree]
#12 0x00007f31255eca12 in gdk_event_source_dispatch (source=<optimized out>, callback=<optimized out>, user_data=<optimized out>) at /build/buildd/gtk+3.0-3.14.8/./gdk/x11/gdkeventsource.c:360
  [Error: /build/buildd/gtk+3.0-3.14.8/./gdk/x11/gdkeventsource.c was not found in source tree]
#13 0x00007f3128b65ecd in g_main_dispatch (context=0x24e9ea0) at /build/buildd/glib2.0-2.43.3/./glib/gmain.c:3122
  [Error: /build/buildd/glib2.0-2.43.3/./glib/gmain.c was not found in source tree]
#14 g_main_context_dispatch (context=context@entry=0x24e9ea0) at /build/buildd/glib2.0-2.43.3/./glib/gmain.c:3737
  [Error: /build/buildd/glib2.0-2.43.3/./glib/gmain.c was not found in source tree]
#15 0x00007f3128b661b0 in g_main_context_iterate (context=0x24e9ea0, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/buildd/glib2.0-2.43.3/./glib/gmain.c:3808
  [Error: /build/buildd/glib2.0-2.43.3/./glib/gmain.c was not found in source tree]
#16 0x00007f3128b664d2 in g_main_loop_run (loop=0x266a950) at /build/buildd/glib2.0-2.43.3/./glib/gmain.c:4002
  [Error: /build/buildd/glib2.0-2.43.3/./glib/gmain.c was not found in source tree]
#17 0x00007f312a48e2a8 in meta_run () at core/main.c:473
  [Error: core/main.c was not found in source tree]
#18 0x000000000040206d in main (argc=1, argv=0x7fff859853e8) at main.c:463
  458: 
  459:   _shell_global_init ("session-mode", session_mode, NULL);
  460: 
  461:   shell_prefs_init ();
  462: 
  463:   ecode = meta_run ();
  464: 
  465:   if (g_getenv ("GNOME_SHELL_ENABLE_CLEANUP"))
  466:     {
  467:       g_printerr ("Doing final cleanup...\n");
  468:       g_object_unref (shell_global_get ());