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bpo-43973: object_set_class() checks Py_TPFLAGS_IMMUTABLETYPE (GH-25714)

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Use Py_TPFLAGS_IMMUTABLETYPE to check for class assignments.
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Erlend Egeberg Aasland 2021-04-30 12:07:02 +02:00 • committed by GitHub
parent 069e81ab3d
commit b73b5fb9ea
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1 changed files with 3 additions and 3 deletions
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Objects/typeobject.c
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@ -4737,10 +4737,10 @@ object_set_class(PyObject *self, PyObject *value, void *closure)
*/ */
if (!(PyType_IsSubtype(newto, &PyModule_Type) && if (!(PyType_IsSubtype(newto, &PyModule_Type) &&
PyType_IsSubtype(oldto, &PyModule_Type)) && PyType_IsSubtype(oldto, &PyModule_Type)) &&
(!(newto->tp_flags & Py_TPFLAGS_HEAPTYPE) || (_PyType_HasFeature(newto, Py_TPFLAGS_IMMUTABLETYPE) ||
!(oldto->tp_flags & Py_TPFLAGS_HEAPTYPE))) { _PyType_HasFeature(oldto, Py_TPFLAGS_IMMUTABLETYPE))) {
PyErr_Format(PyExc_TypeError, PyErr_Format(PyExc_TypeError,
"__class__ assignment only supported for heap types " "__class__ assignment only supported for mutable types "
"or ModuleType subclasses"); "or ModuleType subclasses");
return -1; return -1;
} }