Hi!

While rebuilding the python related packages against the Python 3.15rc2
version we found that ansible-lint fails to build from source:
https://debusine.debian.net/debian/r-python-python3.15/artifact/4856015/

 From the log, the error seems to be:

   test/conftest.py:13: in <module>
       from ansiblelint.testing.fixtures import *  # noqa: F403
       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   ansiblelint/testing/__init__.py:25: in <module>
       from ansiblelint.runner import Runner
   ansiblelint/runner.py:32: in <module>
       import ansiblelint.utils
   ansiblelint/utils.py:42: in <module>
       from dataclasses import _MISSING_TYPE, dataclass, field
   E   ImportError: cannot import name '_MISSING_TYPE' from 'dataclasses'
(/usr/lib/python3.15/dataclasses.py)
   E: pybuild pybuild:485: test: plugin […] or
test_find_children_in_playbook)"
   I: pybuild pybuild:390: cp […]
ansible-lint-26.4.0/.pybuild/cpython3_3.14/build/

Setting the severity to important for now. Once Python 3.15 is released
and later added to python3-defaults, this bug will become release
critical.