Comment 2 for bug 1422253

StacktraceTop:
 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
 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
 meta_window_unmanage (window=0x5a47a70, timestamp=43937965) at core/window.c:1323
 handle_other_xevent (display=0x2931800, event=0x29e70ad) at x11/events.c:1306
 meta_display_handle_xevent (event=0x7fff85985030, display=0x2931800) at x11/events.c:1733