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Bug: dataclass with frozen and slots fails if defaults not provided #567
Description
Description
The following will fail:
from dataclasses import dataclass
import msgspec
@dataclass(frozen=True, slots=True)
class Foo:
foo_value: int = 0
foo = msgspec.convert({}, Foo) # failsThe traceback:
Traceback (most recent call last):
File "~/foo.py", line 9, in <module>
foo = msgspec.convert({}, Foo)
^^^^^^^^^^^^^^^^^^^^^^^^
File "<string>", line 4, in __setattr__
dataclasses.FrozenInstanceError: cannot assign to field 'foo_value'
If the value for foo_value is provided in the initial dictionary, there is no error. Also, the error is only raised if slots=True is present.
Activity
jcrist commentedon Oct 17, 2023
Thanks for the excellent reproducible issue, this has been resolved in #569. I'll try to make a release in the next week or so.