#0  0x00007f2611168117 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  0x00007f2611169808 in __GI_abort () at abort.c:89
  [Error: abort.c was not found in source tree]
#2  0x00007f26117821c5 in g_assertion_message (domain=domain@entry=0x7f2612f26e21 "mutter", file=file@entry=0x7f2612f2ac59 "core/window.c", line=line@entry=1778, func=func@entry=0x7f2612f2dba0 <__FUNCTION__.70732> "meta_window_unmanage", message=message@entry=0x5ba8fb0 "assertion failed: (window->display->focus_window != window)") at /build/buildd/glib2.0-2.41.1/./glib/gtestutils.c:2291
  [Error: /build/buildd/glib2.0-2.41.1/./glib/gtestutils.c was not found in source tree]
#3  0x00007f261178225a in g_assertion_message_expr (domain=domain@entry=0x7f2612f26e21 "mutter", file=file@entry=0x7f2612f2ac59 "core/window.c", line=line@entry=1778, func=func@entry=0x7f2612f2dba0 <__FUNCTION__.70732> "meta_window_unmanage", expr=expr@entry=0x7f2612f2c140 "window->display->focus_window != window") at /build/buildd/glib2.0-2.41.1/./glib/gtestutils.c:2306
  [Error: /build/buildd/glib2.0-2.41.1/./glib/gtestutils.c was not found in source tree]
#4  0x00007f2612ef5dda in meta_window_unmanage (window=0x53725d0, timestamp=timestamp@entry=854617) at core/window.c:1778
  [Error: core/window.c was not found in source tree]
#5  0x00007f2612ec7971 in event_callback (event=0x7fffc24716d0, data=0x3ced050) at core/display.c:2763
  [Error: core/display.c was not found in source tree]
#6  0x00007f2612f16a13 in filter_func (xevent=0x7fffc24716d0, event=<optimized out>, data=<optimized out>) at ui/ui.c:261
  [Error: ui/ui.c was not found in source tree]
#7  0x00007f260e037a81 in gdk_event_apply_filters (xevent=xevent@entry=0x7fffc24716d0, event=event@entry=0x61a1c00, window=window@entry=0x0) at /build/buildd/gtk+3.0-3.12.2/./gdk/x11/gdkeventsource.c:81
  [Error: /build/buildd/gtk+3.0-3.12.2/./gdk/x11/gdkeventsource.c was not found in source tree]
#8  0x00007f260e037d4e in gdk_event_source_translate_event (xevent=0x7fffc24716d0, event_source=0x2486dd0) at /build/buildd/gtk+3.0-3.12.2/./gdk/x11/gdkeventsource.c:195
  [Error: /build/buildd/gtk+3.0-3.12.2/./gdk/x11/gdkeventsource.c was not found in source tree]
#9  _gdk_x11_display_queue_events (display=0x2487030) at /build/buildd/gtk+3.0-3.12.2/./gdk/x11/gdkeventsource.c:338
  [Error: /build/buildd/gtk+3.0-3.12.2/./gdk/x11/gdkeventsource.c was not found in source tree]
#10 0x00007f260e00f449 in gdk_display_get_event (display=display@entry=0x2487030) at /build/buildd/gtk+3.0-3.12.2/./gdk/gdkdisplay.c:320
  [Error: /build/buildd/gtk+3.0-3.12.2/./gdk/gdkdisplay.c was not found in source tree]
#11 0x00007f260e037b02 in gdk_event_source_dispatch (source=<optimized out>, callback=<optimized out>, user_data=<optimized out>) at /build/buildd/gtk+3.0-3.12.2/./gdk/x11/gdkeventsource.c:360
  [Error: /build/buildd/gtk+3.0-3.12.2/./gdk/x11/gdkeventsource.c was not found in source tree]
#12 0x00007f261175dde4 in g_main_dispatch (context=0x2443070) at /build/buildd/glib2.0-2.41.1/./glib/gmain.c:3064
  [Error: /build/buildd/glib2.0-2.41.1/./glib/gmain.c was not found in source tree]
#13 g_main_context_dispatch (context=context@entry=0x2443070) at /build/buildd/glib2.0-2.41.1/./glib/gmain.c:3663
  [Error: /build/buildd/glib2.0-2.41.1/./glib/gmain.c was not found in source tree]
#14 0x00007f261175e028 in g_main_context_iterate (context=0x2443070, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/buildd/glib2.0-2.41.1/./glib/gmain.c:3734
  [Error: /build/buildd/glib2.0-2.41.1/./glib/gmain.c was not found in source tree]
#15 0x00007f261175e2ea in g_main_loop_run (loop=0x2449d00) at /build/buildd/glib2.0-2.41.1/./glib/gmain.c:3928
  [Error: /build/buildd/glib2.0-2.41.1/./glib/gmain.c was not found in source tree]
#16 0x00007f2612ed42c1 in meta_run () at core/main.c:566
  [Error: core/main.c was not found in source tree]
#17 0x0000000000401d11 in main (argc=1, argv=0x7fffc2471ad8) at main.c:437
  432:   if (session_mode == NULL)
  433:     session_mode = is_gdm_mode ? "gdm" : "user";
  434: 
  435:   _shell_global_init ("session-mode", session_mode, NULL);
  436: 
  437:   ecode = meta_run ();
  438: 
  439:   if (g_getenv ("GNOME_SHELL_ENABLE_CLEANUP"))
  440:     {
  441:       g_printerr ("Doing final cleanup...\n");
  442:       g_object_unref (shell_global_get ());