[issue34387] Deletion of attributes in dataclass is buggy!

[Berker Peksag]

Change by Berker Peksag <berker.peksag at gmail.com>:


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components: +Library (Lib) -Argument Clinic
nosy: +eric.smith -larry

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue34387>
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