147 static PyObject*
148 BTree_check(BTree *self)
149 {
150   PyObject *result = NULL;
151   int i = BTree_check_inner(self, NULL);
152 
153   if (i >= 0) {
when considering range: -0x80000000 <= value <= -1
taking False path
154     result = Py_None;
155     Py_INCREF(result);
156   }
157   return result;
returning
returning (PyObject*)NULL without setting an exception
158 }