Comment 2 for bug 1427332

StacktraceTop:
 XGetWindowProperty (dpy=0x10ebc00, w=75497479, property=349, offset=0, length=9223372036854775807, delete=0, req_type=4, actual_type=0x7fff004d75b8, actual_format=0x7fff004d75b4, nitems=0x7fff004d75c0, bytesafter=0x7fff004d75c8, prop=0x7fff004d75d0) at ../../src/GetProp.c:69
 gdk_check_wm_state_changed (window=<optimized out>) at /build/buildd/gtk+3.0-3.14.8/./gdk/x11/gdkdisplay-x11.c:342
 gdk_x11_display_translate_event (translator=0x7f2a1ef83760 <main_arena>, display=0x10f9010, event=0x1b236f0, xevent=0x7fff004d7680) at /build/buildd/gtk+3.0-3.14.8/./gdk/x11/gdkdisplay-x11.c:865
 _gdk_x11_event_translator_translate (translator=0x10f9010, display=0x10f9010, xevent=xevent@entry=0x7fff004d7680) at /build/buildd/gtk+3.0-3.14.8/./gdk/x11/gdkeventtranslator.c:51
 gdk_event_source_translate_event (xevent=0x7fff004d7680, event_source=0x110f740) at /build/buildd/gtk+3.0-3.14.8/./gdk/x11/gdkeventsource.c:240