[issue34265] Dataclasses test doesn't run independently

[Serhiy Storchaka]

Change by Serhiy Storchaka <storchaka+cpython at gmail.com>:


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resolution:  -> duplicate
superseder:  -> Lib/test/test_dataclasses.py failed when ran as a script

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue34265>
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