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bpo-43973: Use Py_TPFLAGS_IMMUTABLETYPE to check for class assignments #25714

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Merged
merged 1 commit into from
Apr 30, 2021
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bpo-43973: Use Py_TPFLAGS_IMMUTABLETYPE to check for class assignments #25714

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6 changes: 3 additions & 3 deletions Objects/typeobject.c
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Original file line number Diff line number Diff line change
Expand Up @@ -4737,10 +4737,10 @@ object_set_class(PyObject *self, PyObject *value, void *closure)
*/
if (!(PyType_IsSubtype(newto, &PyModule_Type) &&
PyType_IsSubtype(oldto, &PyModule_Type)) &&
(!(newto->tp_flags & Py_TPFLAGS_HEAPTYPE) ||
!(oldto->tp_flags & Py_TPFLAGS_HEAPTYPE))) {
(_PyType_HasFeature(newto, Py_TPFLAGS_IMMUTABLETYPE) ||
_PyType_HasFeature(oldto, Py_TPFLAGS_IMMUTABLETYPE))) {
PyErr_Format(PyExc_TypeError,
"__class__ assignment only supported for heap types "
"__class__ assignment only supported for mutable types "
"or ModuleType subclasses");
return -1;
}
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