diff options
| -rw-r--r-- | Objects/typeobject.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/Objects/typeobject.c b/Objects/typeobject.c index b9890ea..0051179 100644 --- a/Objects/typeobject.c +++ b/Objects/typeobject.c @@ -4029,7 +4029,8 @@ recurse_down_subclasses(PyTypeObject *type, slotdef **pp, PyObject *name) ref = PyList_GET_ITEM(subclasses, i); assert(PyWeakref_CheckRef(ref)); subclass = (PyTypeObject *)PyWeakref_GET_OBJECT(ref); - if (subclass == NULL) + assert(subclass != NULL); + if ((PyObject *)subclass == Py_None) continue; assert(PyType_Check(subclass)); /* Avoid recursing down into unaffected classes */ |