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gh-133009: fix UAF in `xml.etree.ElementTree.Element.deepcopy` #172813

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gh-133009: fix UAF in `xml.etree.ElementTree.Element.deepcopy`

gh-133009: fix UAF in `xml.etree.ElementTree.Element.deepcopy` #172813

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Job	Run time
DO-NOT-MERGE	3s
Unresolved review	3s
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