python-txaio fails to build with Python 3.14.0a2.

___________________________ test_is_called[asyncio] ____________________________

framework = <module 'txaio.aio' from '/builddir/build/BUILD/python-txaio-23.1.1-build/BUILDROOT/usr/lib/python3.14/site-packages/txaio/aio.py'>

    def test_is_called(framework):
>       f = txaio.create_future_success(None)

test/test_is_future.py:58: 
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 
../BUILDROOT/usr/lib/python3.14/site-packages/txaio/aio.py:387: in create_future_success
    return self.create_future(result=result)
../BUILDROOT/usr/lib/python3.14/site-packages/txaio/aio.py:366: in create_future
    f = self._loop.create_future()
../BUILDROOT/usr/lib/python3.14/site-packages/txaio/aio.py:323: in _loop
    return asyncio.get_event_loop()
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 

self = <asyncio.unix_events._UnixDefaultEventLoopPolicy object at 0x7f0c9d0d9a90>

    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 test/test_as_future.py::test_as_future_immediate[asyncio] - RuntimeErr...
FAILED test/test_as_future.py::test_as_future_immediate_none[asyncio] - Runti...
FAILED test/test_as_future.py::test_as_future_exception[asyncio] - RuntimeErr...
FAILED test/test_as_future.py::test_as_future_recursive[asyncio] - RuntimeErr...
FAILED test/test_call_later.py::test_create_future_explicit_loop[asyncio] - R...
FAILED test/test_call_later.py::test_create_future_success_explicit_loop[asyncio]
FAILED test/test_call_later.py::test_create_future_failure_explicit_loop[asyncio]
FAILED test/test_callback.py::test_default_resolve[asyncio] - RuntimeError: T...
FAILED test/test_callback.py::test_callback[asyncio] - RuntimeError: There is...
FAILED test/test_callback.py::test_immediate_result[asyncio] - RuntimeError: ...
FAILED test/test_cancel.py::test_cancel[asyncio] - RuntimeError: There is no ...
FAILED test/test_create.py::test_create_result[asyncio] - RuntimeError: There...
FAILED test/test_create.py::test_create_error[asyncio] - RuntimeError: There ...
FAILED test/test_errback.py::test_errback[asyncio] - RuntimeError: There is n...
FAILED test/test_errback.py::test_errback_without_except[asyncio] - RuntimeEr...
FAILED test/test_errback.py::test_errback_plain_exception[asyncio] - RuntimeE...
FAILED test/test_errback.py::test_errback_cancel_exception[asyncio] - Runtime...
FAILED test/test_errback.py::test_errback_illegal_args[asyncio] - RuntimeErro...
FAILED test/test_errback.py::test_errback_reject_no_args[asyncio] - RuntimeEr...
FAILED test/test_errback.py::test_immediate_failure[asyncio] - RuntimeError: ...
FAILED test/test_gather.py::test_gather_two[asyncio] - RuntimeError: There is...
FAILED test/test_gather.py::test_gather_no_consume[asyncio] - RuntimeError: T...
FAILED test/test_is_future.py::test_is_future_generic[asyncio] - RuntimeError...
FAILED test/test_is_future.py::test_is_called[asyncio] - RuntimeError: There ...
================== 24 failed, 24 passed, 70 skipped in 0.43s ===================

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.)


https://docs.python.org/3.14/whatsnew/3.14.html

For the build logs, see:
https://copr-be.cloud.fedoraproject.org/results/@python/python3.14/fedora-rawhide-x86_64/08293026-python-txaio/

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

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.