Comment 2 for bug 861125

StacktraceTop:
 setup_context (registry=<synthetic pointer>, module=<synthetic pointer>, lineno=<synthetic pointer>, filename=<synthetic pointer>, stack_level=1) at ../Python/_warnings.c:449
 do_warn (message="IA__gtk_widget_style_get: assertion `GTK_IS_WIDGET (widget)' failed", category=<type at remote 0x2e087e0>, stack_level=1) at ../Python/_warnings.c:594
 PyErr_WarnEx (category=<type at remote 0x2e087e0>, text=<optimized out>, stack_level=1) at ../Python/_warnings.c:720
 _log_func (log_domain=<optimized out>, log_level=G_LOG_LEVEL_CRITICAL, message=0x3155840 "IA__gtk_widget_style_get: assertion `GTK_IS_WIDGET (widget)' failed", user_data=0x2e087e0) at /build/buildd/pygobject-2-2.28.6/gobject/gobjectmodule.c:2353
 ?? ()