[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)

Co-authored-by: Roderich Schupp <roderich.schupp@gmail.com>
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Miss Islington (bot) 2023-06-26 11:12:40 -07:00 committed by GitHub
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@ -733,7 +733,7 @@ for ``x`` when creating a class instance will share the same copy
of ``x``. Because dataclasses just use normal Python class
creation they also share this behavior. There is no general way
for Data Classes to detect this condition. Instead, the
:func:`dataclass` decorator will raise a :exc:`TypeError` if it
:func:`dataclass` decorator will raise a :exc:`ValueError` if it
detects an unhashable default parameter. The assumption is that if
a value is unhashable, it is mutable. This is a partial solution,
but it does protect against many common errors.