email.policy.default mypy error

[cossor]

Bug report

Bug description:

i anticipated that this issue would be resolved in Python 3.13.2 because i thought i saw a pull request for it, but that did not happen. (i have had false memories before.) mypy 1.14.0 also reports an error, 1.13.0 does not.

from email import parser, policy

"""
using Python 3.13.2, mypy 1.15.0 emits --
default_policy.py:10: error: Argument "policy" to "Parser" has incompatible type "EmailPolicy[EmailMessage]"; expected "Policy[Message[str, str]]"  [arg-type]
Found 1 error in 1 file (checked 1 source file)
"""


parser.Parser(policy=policy.default)

CPython versions tested on:

3.13

Operating systems tested on:

macOS

[picnixz]

Is this a mypy or a CPython issue? if it's a mypy issue, please report it at https://github.com/python/mypy/issues instead (but it could also be a typeshed issue). What would be the non-typing issue? namely can it cause an issue at runtime?

[cossor]

@picnixz, thanks for your comment/questions. i see that my memory of this issue wasn't false, and will stare at the mypy/typeshed repos to discover how/where i should (re)submit.