python-tenacity fails to build with Python 3.14.0a2.

________________________ TestContextManager.test_sleeps ________________________

a = (<tests.test_asyncio.TestContextManager testMethod=test_sleeps>,), kw = {}

    @wraps(callable_)
    def wrapper(*a, **kw):
>       loop = asyncio.get_event_loop()

tests/test_asyncio.py:34: 
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 

self = <asyncio.unix_events._UnixDefaultEventLoopPolicy object at 0x7f38d5e1b0e0>

    def get_event_loop(self):
        """Get the event loop for the current context.
    
        Returns an instance of EventLoop or raises an exception.
        """
        if self._local._loop is None:
>           raise RuntimeError('There is no current event loop in thread %r.'
                               % threading.current_thread().name)
E           RuntimeError: There is no current event loop in thread 'MainThread'.

/usr/lib64/python3.14/asyncio/events.py:681: RuntimeError
=========================== short test summary info ============================
FAILED tests/test_asyncio.py::TestAsync::test_attempt_number_is_correct_for_interleaved_coroutines
FAILED tests/test_asyncio.py::TestAsync::test_iscoroutinefunction - RuntimeEr...
FAILED tests/test_asyncio.py::TestAsync::test_retry - RuntimeError: There is ...
FAILED tests/test_asyncio.py::TestAsync::test_retry_using_async_retying - Run...
FAILED tests/test_asyncio.py::TestAsync::test_stop_after_attempt - RuntimeErr...
FAILED tests/test_asyncio.py::TestContextManager::test_async_retying_iterator
FAILED tests/test_asyncio.py::TestContextManager::test_do_max_attempts - Runt...
FAILED tests/test_asyncio.py::TestContextManager::test_reraise - RuntimeError...
FAILED tests/test_asyncio.py::TestContextManager::test_retry_with_result - Ru...
FAILED tests/test_asyncio.py::TestContextManager::test_sleeps - RuntimeError:...
================= 10 failed, 98 passed, 1 deselected in 2.42s ==================

According to https://docs.python.org/dev/whatsnew/3.14.html#id3

Removed implicit creation of event loop by asyncio.get_event_loop(). It now raises a RuntimeError if there is no current event loop. (Contributed by Kumar Aditya in gh-126353.)

For the build logs, see:
https://copr-be.cloud.fedoraproject.org/results/@python/python3.14/fedora-rawhide-x86_64/08292961-python-tenacity/

For all our attempts to build python-tenacity with Python 3.14, see:
https://copr.fedorainfracloud.org/coprs/g/python/python3.14/package/python-tenacity/

Testing and mass rebuild of packages is happening in copr.
You can follow these instructions to test locally in mock if your package builds with Python 3.14:
https://copr.fedorainfracloud.org/coprs/g/python/python3.14/

Let us know here if you have any questions.

Python 3.14 is planned to be included in Fedora 43.
To make that update smoother, we're building Fedora packages with all pre-releases of Python 3.14.
A build failure prevents us from testing all dependent packages (transitive [Build]Requires),
so if this package is required a lot, it's important for us to get it fixed soon.

We'd appreciate help from the people who know this package best,
but if you don't want to work on this now, let us know so we can try to work around it on our side.