183 static PyObject *
184 urj_pyc_test_cable (urj_pychain_t *self)
185 {
186     urj_chain_t *urc = self->urchain;
187     if (!urj_pyc_precheck (urc, 0))
when considering value == (int)0 from chain.c:187
taking True path
188         return NULL;
189     return urj_py_chkret (urj_cmd_test_cable (urc));
190 }
returning (PyObject*)NULL without setting an exception