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gh-135228: When @dataclass(slots=True) replaces a dataclass, make the original class collectible #136893

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Merged
merged 3 commits into from
Jul 22, 2025
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gh-135228: When @dataclass(slots=True) replaces a dataclass, make the original class collectible #136893

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gh-135228: When @dataclass(slots=True) replaces a dataclass, make the…
JelleZijlstra Jul 20, 2025
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JelleZijlstra Jul 22, 2025
d545002
Update Lib/dataclasses.py
JelleZijlstra Jul 22, 2025
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Update Lib/dataclasses.py
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@JelleZijlstra
JelleZijlstra authored Jul 22, 2025
commit d5450023143fc6cb5229b37ddf616e222d2d99e4
3 changes: 2 additions & 1 deletion Lib/dataclasses.py
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Expand Up @@ -1342,7 +1342,8 @@ def _add_slots(cls, is_frozen, weakref_slot, defined_fields):
# Bypass mapping proxy to allow __dict__ to be removed
old_cls_dict = cls.__dict__ | _deproxier
old_cls_dict.pop('__dict__', None)
del cls.__weakref__
if "__weakref__" in cls.__dict__:
del cls.__weakref__

return newcls

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