Comment 2 for bug 1660409

StacktraceTop:
 ?? ()
 gdk_event_apply_filters (xevent=xevent@entry=0x7fff2531e070, event=event@entry=0x565403fe0330, window=window@entry=0x565403eff000) at /build/gtk+2.0-KsZKkB/gtk+2.0-2.24.30/gdk/x11/gdkevents-x11.c:371
 gdk_event_translate (display=display@entry=0x565403ef6000, event=event@entry=0x565403fe0330, xevent=xevent@entry=0x7fff2531e070, return_exposes=return_exposes@entry=0) at /build/gtk+2.0-KsZKkB/gtk+2.0-2.24.30/gdk/x11/gdkevents-x11.c:1074
 _gdk_events_queue (display=display@entry=0x565403ef6000) at /build/gtk+2.0-KsZKkB/gtk+2.0-2.24.30/gdk/x11/gdkevents-x11.c:2358
 gdk_event_dispatch (source=<optimized out>, callback=<optimized out>, user_data=<optimized out>) at /build/gtk+2.0-KsZKkB/gtk+2.0-2.24.30/gdk/x11/gdkevents-x11.c:2419