[issue45385] Fix possible reference leak from descr_check

[Dong-hee Na]

New submission from Dong-hee Na <donghee.na at python.org>:

Report from @kj: https://github.com/python/cpython/pull/28719#discussion_r721249643

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components: Interpreter Core
messages: 403282
nosy: corona10, kj, vstinner
priority: normal
severity: normal
status: open
title: Fix possible reference leak from descr_check
type: enhancement
versions: Python 3.10, Python 3.11, Python 3.9

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue45385>
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