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gh-128759: fix data race in type_modified_unlocked (#128764)

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sobolevn 2025-01-13 10:40:52 +03:00 • committed by GitHub
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Objects/typeobject.c
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@ -1038,7 +1038,7 @@ type_modified_unlocked(PyTypeObject *type)
We don't assign new version tags eagerly, but only as
needed.
*/
if (type->tp_version_tag == 0) {
if (FT_ATOMIC_LOAD_UINT_RELAXED(type->tp_version_tag) == 0) {
return;
}
// Cannot modify static builtin types.