1885 static PyObject* 
1886 _fillband(ImagingObject* self, PyObject* args)
1887 {
1888     int band;
1889     int color;
1890 
1891     if (!PyArg_ParseTuple(args, "ii", &band, &color))
when PyArg_ParseTuple() succeeds
taking False path
1892 	return NULL;
1893 
1894     if (!ImagingFillBand(self->image, band, color))
when treating unknown struct ImagingMemoryInstance * from _imaging.c:1894 as NULL
taking True path
1895         return NULL;
1896     
1897     Py_INCREF(Py_None);
1898     return Py_None;
1899 }
returning (PyObject*)NULL without setting an exception