def test_filter_traceback_path_no_longer_valid(self, pytester: Pytester) -> None:
        """Test that filter_traceback() works with the fact that
        _pytest._code.code.Code.path attribute might return an str object.

        In this case, one of the files in the traceback no longer exists.
        This fixes #1133.
        """
        from _pytest._code import filter_traceback

        pytester.syspathinsert()
        pytester.makepyfile(
            filter_traceback_entry_as_str="""
            def foo():
                raise ValueError
        """
        )
        tb = None
        try:
            import filter_traceback_entry_as_str

            filter_traceback_entry_as_str.foo()
        except ValueError:
            _, _, tb = sys.exc_info()

        assert tb is not None
        pytester.path.joinpath("filter_traceback_entry_as_str.py").unlink()
        traceback = _pytest._code.Traceback(tb)
        assert isinstance(traceback[-1].path, str)
        assert filter_traceback(traceback[-1])
Test that filter_traceback() works with the fact that
        _pytest._code.code.Code.path attribute might return an str object.

        In this case, one of the files in the traceback no longer exists.
        This fixes #1133.
        
testing/python/collect.py