pytypes (1.0b5) Interferes with pytest 6.1.1

[harahu]

I have a project where installing pytypes as a dependency seems to brick pytest. This is the new behaviour when trying to run my test suite.

Traceback (most recent call last):
  File "/home/<user>/.pyenv/versions/3.7.9/lib/python3.7/runpy.py", line 193, in _run_module_as_main
    "__main__", mod_spec)
  File "/home/<user>/.pyenv/versions/3.7.9/lib/python3.7/runpy.py", line 85, in _run_code
    exec(code, run_globals)
  File "/home/<project path>/.venv/lib/python3.7/site-packages/pytest/__main__.py", line 5, in <module>
    raise SystemExit(pytest.console_main())
  File "/home/<project path>/.venv/lib/python3.7/site-packages/_pytest/config/__init__.py", line 187, in console_main
    code = main()
  File "/home/<project path>/.venv/lib/python3.7/site-packages/_pytest/config/__init__.py", line 165, in main
    config=config
  File "/home/<project path>/.venv/lib/python3.7/site-packages/pluggy/hooks.py", line 286, in __call__
    return self._hookexec(self, self.get_hookimpls(), kwargs)
  File "/home/<project path>/.venv/lib/python3.7/site-packages/pluggy/manager.py", line 93, in _hookexec
    return self._inner_hookexec(hook, methods, kwargs)
  File "/home/<project path>/.venv/lib/python3.7/site-packages/pluggy/manager.py", line 87, in <lambda>
    firstresult=hook.spec.opts.get("firstresult") if hook.spec else False,
  File "/home/<project path>/.venv/lib/python3.7/site-packages/pluggy/callers.py", line 208, in _multicall
    return outcome.get_result()
  File "/home/<project path>/.venv/lib/python3.7/site-packages/pluggy/callers.py", line 80, in get_result
    raise ex[1].with_traceback(ex[2])
  File "/home/<project path>/.venv/lib/python3.7/site-packages/pluggy/callers.py", line 187, in _multicall
    res = hook_impl.function(*args)
  File "/home/<project path>/.venv/lib/python3.7/site-packages/_pytest/main.py", line 306, in pytest_cmdline_main
    return wrap_session(config, _main)
  File "/home/<project path>/.venv/lib/python3.7/site-packages/_pytest/main.py", line 301, in wrap_session
    config._ensure_unconfigure()
  File "/home/<project path>/.venv/lib/python3.7/site-packages/_pytest/config/__init__.py", line 991, in _ensure_unconfigure
    fin()
  File "/home/<project path>/.venv/lib/python3.7/site-packages/_pytest/capture.py", line 699, in stop_global_capturing
    self._global_capturing.pop_outerr_to_orig()
  File "/home/<project path>/.venv/lib/python3.7/site-packages/_pytest/capture.py", line 579, in pop_outerr_to_orig
    out, err = self.readouterr()
  File "/home/<project path>/.venv/lib/python3.7/site-packages/_pytest/capture.py", line 631, in readouterr
    return CaptureResult(out, err)
  File "/home/<project path>/.venv/lib/python3.7/site-packages/pytypes/__init__.py", line 567, in __Generic__new__
    if cls.__origin__ is None:
AttributeError: type object 'CaptureResult' has no attribute '__origin__'

[The-Compiler]

According to Stewori/pytypes#40, the current pytypes release (1.0b5 from July 2018) does not support Python 3.7.