17 static PyObject *
18 TreeSet_insert(BTree *self, PyObject *args)
19 {
20     PyObject *key;
21     int i;
22 
23     if (!PyArg_ParseTuple(args, "O:insert", &key)) 
when PyArg_ParseTuple() succeeds
taking False path
24 	return NULL;
25     i = _BTree_set(self, key, Py_None, 1, 1);
26     if (i < 0) 
when considering range: -0x80000000 <= value <= -1
taking True path
27 	return NULL;
28     return PyInt_FromLong(i);
29 }
returning (PyObject*)NULL without setting an exception