Comment 2 for bug 1428619

StacktraceTop:
 gdk_window_is_destroyed (window=0x1) at /build/buildd/gtk+3.0-3.14.8/./gdk/gdkwindow.c:2172
 gtk_get_event_widget (event=event@entry=0x12078c0) at /build/buildd/gtk+3.0-3.14.8/./gtk/gtkmain.c:2390
 gtk_widget_event_internal (widget=0xa1c3b0, event=0x12078c0) at /build/buildd/gtk+3.0-3.14.8/./gtk/gtkwidget.c:7666
 propagate_event_up (topmost=<optimized out>, event=<optimized out>, widget=0xa1c3b0) at /build/buildd/gtk+3.0-3.14.8/./gtk/gtkmain.c:2424
 propagate_event (widget=widget@entry=0xa1c3b0, event=0x12078c0, captured=captured@entry=0, topmost=topmost@entry=0x0) at /build/buildd/gtk+3.0-3.14.8/./gtk/gtkmain.c:2526