740 static snackWidget * radioButtonWidget(PyObject * s, PyObject * args) {
741     snackWidget * widget, * group;
742     char * text;
743     int isOn;
744 
745     if (!PyArg_ParseTuple(args, "sOi", &text, &group, &isOn)) 
746 		return NULL;
when PyArg_ParseTuple() succeeds
taking False path
747 
748     widget = snackWidgetNew ();
749 
when snackWidgetNew() fails
750     if ((PyObject *) group == Py_None)
751 	widget->co = newtRadiobutton(-1, -1, text, isOn, NULL);
taking False path
752     else
753 	widget->co = newtRadiobutton(-1, -1, text, isOn, group->co);
754 
dereferencing NULL (widget->co) at snackmodule.c:756
755     return widget;
756 }
757