GitLab

https://bugs.python.org/issue20443

This broke test_defer_excchain_dump because
testprog/golang_test_defer_excchain.txt is prepared with output where
`python file` shows that file name in traceback as it was specified on
the command line, e.g.

    .../pygolang/golang/testprog$ python golang_test_defer_excchain.py
    Traceback (most recent call last):
      File ".../pygolang/golang/__init__.py", line 103, in _
        return f(*argv, **kw)
      File "golang_test_defer_excchain.py", line 42, in main
        raise RuntimeError("err")
    RuntimeError: err

while with py39 it became

    .../pygolang/golang/testprog$ python golang_test_defer_excchain.py
    Traceback (most recent call last):
      File ".../pygolang/golang/__init__.py", line 103, in _
        return f(*argv, **kw)
      File ".../pygolang/golang/testprog/golang_test_defer_excchain.py", line 42, in main
        raise RuntimeError("err")
    RuntimeError: err

(notice the difference relat...