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[3.11] gh-106107: document correct error that's raised when a mutable default value for a field is detected (gh-106109) (gh-106116)
gh-106107: document correct error that's raised when a mutable default value for a field is detected (gh-106109)
(cherry picked from commit 512f299e55
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Co-authored-by: Roderich Schupp <roderich.schupp@gmail.com>
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@ -733,7 +733,7 @@ for ``x`` when creating a class instance will share the same copy
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of ``x``. Because dataclasses just use normal Python class
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creation they also share this behavior. There is no general way
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for Data Classes to detect this condition. Instead, the
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:func:`dataclass` decorator will raise a :exc:`TypeError` if it
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:func:`dataclass` decorator will raise a :exc:`ValueError` if it
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detects an unhashable default parameter. The assumption is that if
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a value is unhashable, it is mutable. This is a partial solution,
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but it does protect against many common errors.
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