[issue39110] It seems that TestCase.assertListEqual change the value of its parameters

[ctarn]

Change by ctarn <i at ctarn.io>:


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nosy:  -ctarn
title: It -> It seems that TestCase.assertListEqual change the value of its parameters
versions: +Python 3.8

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue39110>
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