[Bug] Regression on Python 3.14.0a1: TestAuthCodeReceiver.test_no_two_concurrent_receivers_can_listen_on_same_port fails

[musicinmybrain]

Describe the bug
With Python 3.14.0a1, TestAuthCodeReceiver.test_no_two_concurrent_receivers_can_listen_on_same_port fails.

To Reproduce
Steps to reproduce the behavior:

$ python3.14 --version
Python 3.14.0a1
$ python3.14 -m venv _e
$ . _e/bin/activate
(_e) $ pip install -e .
(_e) $ pip install -r requirements.txt
(_e) $ python -m pytest

Expected behavior
All tests pass.

What you see instead

========================================================================================== short test summary info ==========================================================================================
FAILED tests/test_authcode.py::TestAuthCodeReceiver::test_no_two_concurrent_receivers_can_listen_on_same_port - AssertionError: OSError not raised
========================================================================== 1 failed, 151 passed, 70 skipped, 42 warnings in 45.61s ==========================================================================

The MSAL Python version you are using

7db6c2c

1.31.0

Additional context

Detailed test output:

================================================================================================= FAILURES ==================================================================================================
_______________________________________________________________ TestAuthCodeReceiver.test_no_two_concurrent_receivers_can_listen_on_same_port _______________________________________________________________

self = <tests.test_authcode.TestAuthCodeReceiver testMethod=test_no_two_concurrent_receivers_can_listen_on_same_port>

    def test_no_two_concurrent_receivers_can_listen_on_same_port(self):
        with AuthCodeReceiver() as receiver:
            expected_error = OSError if sys.version_info[0] > 2 else socket.error
>           with self.assertRaises(expected_error):
E           AssertionError: OSError not raised

tests/test_authcode.py:24: AssertionError

If I repeat the same steps to reproduce using Python 3.13 instead of 3.14, all tests pass.

This was reported dowstream in Fedora Linux as part of early Python 3.14 testing.

[rayluo]

Waiting for outcome of python/cpython#127319

[rayluo]

Closing this now, as it was fixed from upstream Python. Feel free to reopen it in Python's repo in case there would be a regression in the future.