Comment 2 for bug 1373123

StacktraceTop:
 ?? ()
 _gtk_marshal_BOOLEAN__BOXED (closure=0x849f760, return_value=0xbfa2cd5c, n_param_values=2, param_values=0xbfa2cdc0, invocation_hint=0xbfa2cd78, marshal_data=0x0) at /build/buildd/gtk+3.0-3.12.2/./gtk/gtkmarshalers.c:85
 g_closure_invoke (closure=0x849f760, return_value=0xbfa2cd5c, n_param_values=2, param_values=0xbfa2cdc0, invocation_hint=0xbfa2cd78) at /build/buildd/glib2.0-2.41.5/./gobject/gclosure.c:768
 signal_emit_unlocked_R (node=0x0, node@entry=0x816bc00, detail=1, detail@entry=0, instance=0x8286390, emission_return=0xbfa2ce5c, instance_and_params=0xbfa2cdc0) at /build/buildd/glib2.0-2.41.5/./gobject/gsignal.c:3553
 g_signal_emit_valist (instance=0x8286390, signal_id=46, detail=0, var_args=0xbfa2cf20 "8\317\242\277\020]\025\b") at /build/buildd/glib2.0-2.41.5/./gobject/gsignal.c:3319