[dataclasses] Exception on __doc__ generation, when object signature cannot be fetched #103449
Description
Reproducible on current main branch:
from dataclasses import dataclass from typing import TypedDict @dataclass class Foo(TypedDict): bar: intTraceback:
Traceback (most recent call last): File "/home/eclips4/projects/test.py", line 6, in <module> @dataclass ^^^^^^^^^ File "/usr/local/lib/python3.12/dataclasses.py", line 1237, in dataclass return wrap(cls) ^^^^^^^^^ File "/usr/local/lib/python3.12/dataclasses.py", line 1227, in wrap return _process_class(cls, init, repr, eq, order, unsafe_hash, ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/usr/local/lib/python3.12/dataclasses.py", line 1113, in _process_class str(inspect.signature(cls)).replace(' -> None', '')) ^^^^^^^^^^^^^^^^^^^^^^ File "/usr/local/lib/python3.12/inspect.py", line 3252, in signature return Signature.from_callable(obj, follow_wrapped=follow_wrapped, ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/usr/local/lib/python3.12/inspect.py", line 2996, in from_callable return _signature_from_callable(obj, sigcls=cls, ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/usr/local/lib/python3.12/inspect.py", line 2503, in _signature_from_callable sig = _get_signature_of(call) ^^^^^^^^^^^^^^^^^^^^^^^ File "/usr/local/lib/python3.12/inspect.py", line 2556, in _signature_from_callable raise ValueError( ValueError: no signature found for builtin type <class 'dict'>However, this code works on 3.8 version (but of course we cannot instantiate a Test class)
Maybe we need to add a some check in sources of dataclass.
Also, this error is not critical, so, feel free to "close as not planned" =)