Flake8 error on Darker repo

[akaihola]

In build #1042:

Run TrueBrain/actions-flake8@v2
  with:
    plugins: flake8-2020>=1.6.1 flake8-bugbear>=22.1.11 flake8-comprehensions>=3.7.0
  
    error_classes: E,F
    working_directory: .
Run if [ -z "" ]; then
  if [ -z "" ]; then
    flake8_version=""
  else
    flake8_version="=="
  fi
  plugins=
  if [ -n "flake8-2020>=1.6.1 flake8-bugbear>=22.1.11 flake8-comprehensions>=3.7.0
  " ]; then
    plugins="flake8-2020>=1.6.1 flake8-bugbear>=22.1.11 flake8-comprehensions>=3.7.0
  "
  fi
  pip install flake8${flake8_version} ${plugins}
  shell: /usr/bin/bash --noprofile --norc -e -o pipefail {0}
Defaulting to user installation because normal site-packages is not writeable
Collecting flake8
  Downloading flake8-7.1.1-py2.py3-none-any.whl (57 kB)
     ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 57.7/57.7 KB 4.3 MB/s eta 0:00:00
Collecting flake8-2020>=1.6.1
  Downloading flake8_2020-1.8.1-py2.py3-none-any.whl (4.9 kB)
Collecting flake8-bugbear>=22.1.11
  Downloading flake8_bugbear-24.8.19-py3-none-any.whl (35 kB)
Collecting flake8-comprehensions>=3.7.0
  Downloading flake8_comprehensions-3.15.0-py3-none-any.whl (8.2 kB)
Collecting mccabe<0.8.0,>=0.7.0
  Downloading mccabe-0.7.0-py2.py3-none-any.whl (7.3 kB)
Collecting pycodestyle<2.13.0,>=2.12.0
  Downloading pycodestyle-2.12.1-py2.py3-none-any.whl (31 kB)
Collecting pyflakes<3.3.0,>=3.2.0
  Downloading pyflakes-3.2.0-py2.py3-none-any.whl (62 kB)
     ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 62.7/62.7 KB 29.8 MB/s eta 0:00:00
Requirement already satisfied: attrs>=19.2.0 in /usr/lib/python3/dist-packages (from flake8-bugbear>=22.1.11) (21.2.0)
Installing collected packages: pyflakes, pycodestyle, mccabe, flake8, flake8-comprehensions, flake8-bugbear, flake8-2020
Successfully installed flake8-7.1.1 flake8-2020-1.8.1 flake8-bugbear-24.8.19 flake8-comprehensions-3.15.0 mccabe-0.7.0 pycodestyle-2.12.1 pyflakes-3.2.0
Run /home/runner/work/_actions/TrueBrain/actions-flake8/v2/action/entrypoint.sh
 - error_classes: 'E,F'
 - warning_classes: ''
Running flake8 on '' with the following options:
 - ignoring: ''
 - max line length: ''
 - path: ''
 - extra arguments: ''
Resulting command: flake8  
Traceback (most recent call last):
  File "/home/runner/.local/lib/python3.10/site-packages/flake8/plugins/finder.py", line 291, in _load_plugin
    obj = plugin.entry_point.load()
  File "/usr/lib/python3.10/importlib/metadata/__init__.py", line 171, in load
    module = import_module(match.group('module'))
  File "/usr/lib/python3.10/importlib/__init__.py", line 126, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 1050, in _gcd_import
  File "<frozen importlib._bootstrap>", line 1027, in _find_and_load
  File "<frozen importlib._bootstrap>", line 1006, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 688, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 883, in exec_module
  File "<frozen importlib._bootstrap>", line 241, in _call_with_frames_removed
  File "/home/runner/.local/lib/python3.10/site-packages/bugbear.py", line 49, in <module>
    @attr.s(unsafe_hash=False)
TypeError: attrs() got an unexpected keyword argument 'unsafe_hash'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/home/runner/.local/bin/flake8", line 8, in <module>
    sys.exit(main())
  File "/home/runner/.local/lib/python3.10/site-packages/flake8/main/cli.py", line 23, in main
    app.run(argv)
  File "/home/runner/.local/lib/python3.10/site-packages/flake8/main/application.py", line 198, in run
    self._run(argv)
  File "/home/runner/.local/lib/python3.10/site-packages/flake8/main/application.py", line 186, in _run
    self.initialize(argv)
  File "/home/runner/.local/lib/python3.10/site-packages/flake8/main/application.py", line 165, in initialize
    self.plugins, self.options = parse_args(argv)
  File "/home/runner/.local/lib/python3.10/site-packages/flake8/options/parse_args.py", line 42, in parse_args
    plugins = finder.load_plugins(raw_plugins, plugin_opts)
  File "/home/runner/.local/lib/python3.10/site-packages/flake8/plugins/finder.py", line 365, in load_plugins
    return _classify_plugins(_import_plugins(plugins, opts), opts)
  File "/home/runner/.local/lib/python3.10/site-packages/flake8/plugins/finder.py", line 307, in _import_plugins
    return [_load_plugin(p) for p in plugins]
  File "/home/runner/.local/lib/python3.10/site-packages/flake8/plugins/finder.py", line 307, in <listcomp>
    return [_load_plugin(p) for p in plugins]
  File "/home/runner/.local/lib/python3.10/site-packages/flake8/plugins/finder.py", line 293, in _load_plugin
    raise FailedToLoadPlugin(plugin.package, e)
flake8.exceptions.FailedToLoadPlugin: Flake8 failed to load plugin "flake8-bugbear" due to attrs() got an unexpected keyword argument 'unsafe_hash'.
Flake8 found one or more problems
Error: Process completed with exit code 1.