[issue42398] Race condition in "make regen-all" when running jobs in parallel

[STINNER Victor]

Change by STINNER Victor <vstinner at python.org>:


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pull_requests: +22260
pull_request: https://github.com/python/cpython/pull/23367

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue42398>
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