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gh-159739: Keep descriptor metadata dictionaries alive during insertion - #160193
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…nsertion The classmethod and staticmethod metadata setters dropped their reference to the descriptor dictionary before inserting the new value. A key comparison or value finalizer can replace the dictionary during insertion, leaving the operation using released memory. Keep the dictionary alive until insertion finishes. Backport to 3.15 and 3.14.
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The classmethod and staticmethod metadata setters dropped their reference to the descriptor dictionary before inserting the new value. A key comparison or value finalizer can replace the dictionary during insertion, leaving the operation using released memory. Keep the dictionary alive until insertion finishes. Backport to 3.15 and 3.14.