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Bug description:
The __weakref__ slot is not set for classes that have a Generic[T] base.
from typing import Generic, TypeVar
from dataclasses import dataclass
T = TypeVar("T")
@dataclass(slots=True, weakref_slot=True)
class Token(Generic[T]):
ctx: T
print(f"{Token.__slots__=!r}")
print(f"{hasattr(Token, '__weakref__')=}")Output on 3.12.2:
Token.__slots__=('ctx', '__weakref__')
hasattr(Token, '__weakref__')=True
On 3.12.3:
Token.__slots__=('ctx',)
hasattr(Token, '__weakref__')=False
CPython versions tested on:
3.12
Operating systems tested on:
Linux, macOS, Windows
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only security fixesonly security fixesbugs and security fixesbugs and security fixesPython modules in the Lib dirPython modules in the Lib dirAn unexpected behavior, bug, or errorAn unexpected behavior, bug, or error