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GH-93990: fix refcounting bug in `add_subclass` in `typeobject.c` (GH-93989)

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Kumar Aditya 2022-06-19 11:36:37 +05:30 committed by GitHub
parent 6066f450b9
commit 726448ebe1
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1 changed files with 4 additions and 1 deletions
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Objects/typeobject.c
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@ -6671,8 +6671,11 @@ add_subclass(PyTypeObject *base, PyTypeObject *type)
PyObject *subclasses = base->tp_subclasses; PyObject *subclasses = base->tp_subclasses;
if (subclasses == NULL) { if (subclasses == NULL) {
base->tp_subclasses = subclasses = PyDict_New(); base->tp_subclasses = subclasses = PyDict_New();
if (subclasses == NULL) if (subclasses == NULL) {
Py_DECREF(key);
Py_DECREF(ref);
return -1; return -1;
}
} }
assert(PyDict_CheckExact(subclasses)); assert(PyDict_CheckExact(subclasses));