[issue42203] Unexpected behaviour NameError: name 'open' is not defined

[Serhiy Storchaka]

Serhiy Storchaka <storchaka+cpython at gmail.com> added the comment:

It can happen if the code is executed very late at the shutdown stage. The builtin module is restored to its initial state (open is imported from io) to get rid of reference cycles.

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nosy: +serhiy.storchaka, vinay.sajip

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue42203>
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