2.8.0 breaks mypy #549
Description
Our CI pulled in pydantic-settings 2.8.0 and it triggered an internal error in mypy.
We invoke mypy using --install-types --non-interactive and are using mypy 1.15.0
Traceback (most recent call last):
File "mypy/semanal.py", line 7240, in accept
File "mypy/nodes.py", line 1177, in accept
File "mypy/semanal.py", line 1728, in visit_class_def
File "mypy/semanal.py", line 1944, in analyze_class
File "mypy/semanal.py", line 1991, in analyze_class_body_common
File "mypy/semanal.py", line 2076, in apply_class_plugin_hooks
File "/usr/local/lib/python3.11/site-packages/pydantic/mypy.py", line 184, in _pydantic_model_class_maker_callback
return transformer.transform()
^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/local/lib/python3.11/site-packages/pydantic/mypy.py", line 527, in transform
self.add_initializer(fields, config, is_settings, is_root_model)
File "/usr/local/lib/python3.11/site-packages/pydantic/mypy.py", line 927, in add_initializer
if arg_name.startswith('__') or not arg_name.startswith('_'):
^^^^^^^^^^^^^^^^^^^
AttributeError: 'NoneType' object has no attribute 'startswith'
Pinning to < 2.8.0 doesn't hit the issue.
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