255 static PyObject *
256 urj_pyc_set_trst (urj_pychain_t *self, PyObject *args)
257 {
258     urj_chain_t *urc = self->urchain;
259     int trstval;
260     if (!PyArg_ParseTuple (args, "i", &trstval))
when PyArg_ParseTuple() succeeds
taking False path
261         return NULL;
262     if (!urj_pyc_precheck (urc, UPRC_CBL))
when considering value == (int)0 from chain.c:262
taking True path
263         return NULL;
264     urj_tap_chain_set_trst (urc, trstval);
265     return Py_BuildValue ("");
266 }
returning (PyObject*)NULL without setting an exception