Tighten the tests for assignment to __bases__: disallow empty tuple.
diff --git a/Objects/typeobject.c b/Objects/typeobject.c
index 193b0cc..a9c229a 100644
--- a/Objects/typeobject.c
+++ b/Objects/typeobject.c
@@ -211,6 +211,12 @@
type->tp_name, value->ob_type->tp_name);
return -1;
}
+ if (PyTuple_GET_SIZE(value) == 0) {
+ PyErr_Format(PyExc_TypeError,
+ "can only assign non-empty tuple to %s.__bases__, not ()",
+ type->tp_name);
+ return -1;
+ }
for (i = 0; i < PyTuple_GET_SIZE(value); i++) {
ob = PyTuple_GET_ITEM(value, i);
if (!PyClass_Check(ob) && !PyType_Check(ob)) {