[issue43963] test_interpreters has side effects on test_signal

[STINNER Victor]

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

This issue is a follow-up of bpo-41713:

commit 7f9b25a21ab95f8cf8d663396993766307be475c
Author: Victor Stinner <vstinner at python.org>
Date:   Tue Nov 17 23:28:25 2020 +0100

    bpo-41713: Port _signal module to multi-phase init (GH-23355)
    
    Port the _signal extension module to the multi-phase initialization
    API (PEP 489).
    
    Co-Authored-By: Mohamed Koubaa <koubaa.m at gmail.com>

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