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[3.12] gh-130809: Fix PyFrame_LocalsToFast copying the wrong value (#130816)

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* gh-130809: Fix `PyFrame_LocalsToFast` copying the wrong value

* Skip hidden locals

* test, blurb

* Update Misc/NEWS.d/next/Core_and_Builtins/2025-03-04-12-52-21.gh-issue-130809.fSXq60.rst

Co-authored-by: Tian Gao <gaogaotiantian@hotmail.com>

* Update test

* PR feedback

* formatting

* comment

---------

Co-authored-by: Tian Gao <gaogaotiantian@hotmail.com>
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Kyle Cutler 2025-03-10 17:27:07 -07:00 • committed by GitHub
parent fcf1f57d91
commit 33605da91c
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Objects/frameobject.c
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@ -1405,6 +1405,9 @@ _PyFrame_LocalsToFast(_PyInterpreterFrame *frame, int clear)
if (kind & CO_FAST_FREE && !(co->co_flags & CO_OPTIMIZED)) {
continue;
}
if (kind & CO_FAST_HIDDEN) {
continue;
}
PyObject *name = PyTuple_GET_ITEM(co->co_localsplusnames, i);
PyObject *value = PyObject_GetItem(locals, name);
/* We only care about NULLs if clear is true. */