[issue34410] itertools.tee not thread-safe; can segfault interpreter when wrapped iterator releases GIL

[hongweipeng]

Change by hongweipeng <hongweichen8888 at sina.com>:


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keywords: +patch
pull_requests: +8533
stage: needs patch -> patch review

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue34410>
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