can't handle classic classes here

diff --git a/Objects/typeobject.c b/Objects/typeobject.c
index eb3560b4c41a8df9183fc84123bb5a5b1052f63f..fabdd9db1451aaec14f9a8fda770a8d0cec8ac65 100644 (file)
--- a/Objects/typeobject.c
+++ b/Objects/typeobject.c
@@ -1216,6 +1216,7 @@ lookup_method(PyObject *self, char *attrstr, PyObject **attrobj)
 PyObject *
 _PyObject_LookupSpecial(PyObject *self, char *attrstr, PyObject **attrobj)
 {
+       assert(!PyInstance_Check(self));
        return lookup_maybe(self, attrstr, attrobj);
 }