268 static PyObject *
269 urj_pyc_get_trst (urj_pychain_t *self)
270 {
271     int trstval;
272     urj_chain_t *urc = self->urchain;
273     if (!urj_pyc_precheck (urc, UPRC_CBL))
when considering value == (int)0 from chain.c:273
taking True path
274         return NULL;
275 
276     trstval = urj_tap_chain_get_trst (urc);
277     return Py_BuildValue ("i", trstval);
278 }
returning (PyObject*)NULL without setting an exception