This removes the KeyError from the traceback chain when an
conftest fails to import:
return self._conftestpath2mod[key]
E KeyError: WindowsPath('D:/projects/pytest/.tmp/root/foo/conftest.py')
During handling of the above exception, another exception occurred:
...
raise RuntimeError("some error")
E RuntimeError: some error
During handling of the above exception, another exception occurred:
...
E _pytest.config.ConftestImportFailure: (...)
By slightly changing the code, we can remove the first chain, which is often
very confusing to users and doesn't help with anything.
Fix#7223
5eaebc1900