[issue43662] test_tools: test_reindent_file_with_bad_encoding() fails on s390x RHEL7 LTO + PGO 3.x

[STINNER Victor]

STINNER Victor <vstinner at python.org> added the comment:

Oh. Or maybe it's related to:

commit 4827483f47906fecee6b5d9097df2a69a293a85c
Author: Inada Naoki <songofacandy at gmail.com>
Date:   Mon Mar 29 12:28:14 2021 +0900

    bpo-43510: Implement PEP 597 opt-in EncodingWarning. (GH-19481)
    
    See [PEP 597](https://www.python.org/dev/peps/pep-0597/).
    
    * Add `-X warn_default_encoding` and `PYTHONWARNDEFAULTENCODING`.
    * Add EncodingWarning
    * Add io.text_encoding()
    * open(), TextIOWrapper() emits EncodingWarning when encoding is omitted and warn_default_encoding is enabled.
    * _pyio.TextIOWrapper() uses UTF-8 as fallback default encoding used when failed to import locale module. (used during building Python)
    * bz2, configparser, gzip, lzma, pathlib, tempfile modules use io.text_encoding().
    * What's new entry

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nosy: +methane

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