786 static PyObject* 
787 _copy2(ImagingObject* self, PyObject* args)
788 {
789     ImagingObject* imagep1;
790     ImagingObject* imagep2;
791     if (!PyArg_ParseTuple(args, "O!O!",
when PyArg_ParseTuple() succeeds
taking False path
792 			  &Imaging_Type, &imagep1,
793 			  &Imaging_Type, &imagep2))
794 	return NULL;
795 
796     if (!ImagingCopy2(imagep1->image, imagep2->image))
when treating unknown struct ImagingMemoryInstance * from _imaging.c:796 as NULL
taking True path
797         return NULL;
798 
799     Py_INCREF(Py_None);
800     return Py_None;
801 }
returning (PyObject*)NULL without setting an exception