python-inject fails to build with Python 3.12.0a3.

=================================== FAILURES ===================================
______________________ TestInjectParams.test_async_param _______________________

self = <test.test_param.TestInjectParams testMethod=test_async_param>

    def test_async_param(self):
        @inject.param('val')
        async def test_func(val):
            return val
    
        inject.configure(lambda binder: binder.bind('val', 123))
    
        assert inspect.iscoroutinefunction(test_func)
>       assert self.run_async(test_func()) == 123

test/test_param.py:34: 
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 
test/__init__.py:11: in run_async
    loop = asyncio.get_event_loop()
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 

self = <asyncio.unix_events._UnixDefaultEventLoopPolicy object at 0x7fdaee51cc50>

    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/python3.12/asyncio/events.py:676: RuntimeError
______________________ TestInjectParams.test_async_params ______________________

self = <test.test_params.TestInjectParams testMethod=test_async_params>

    def test_async_params(self):
        @inject.params(val=int)
        async def test_func(val):
            return val
    
        inject.configure(lambda binder: binder.bind(int, 123))
    
        assert inspect.iscoroutinefunction(test_func)
>       assert self.run_async(test_func()) == 123

test/test_params.py:147: 
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 
test/__init__.py:11: in run_async
    loop = asyncio.get_event_loop()
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 

self = <asyncio.unix_events._UnixDefaultEventLoopPolicy object at 0x7fdaee51cc50>

    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/python3.12/asyncio/events.py:676: RuntimeError
=========================== short test summary info ============================
FAILED test/test_param.py::TestInjectParams::test_async_param - RuntimeError:...
FAILED test/test_params.py::TestInjectParams::test_async_params - RuntimeErro...
========================= 2 failed, 46 passed in 0.17s =========================

asyncio.get_event_loop() and many other asyncio functions like ensure_future(), shield() or gather(), and also the get_event_loop() method of BaseDefaultEventLoopPolicy now raise a RuntimeError if called when there is no running event loop and the current event loop was not set. Previously they implicitly created and set a new current event loop. DeprecationWarning is no longer emitted if there is no running event loop but the current event loop is set in the policy. (Contributed by Serhiy Storchaka in gh-93453.)

https://github.com/python/cpython/issues/93453
https://docs.python.org/3.12/whatsnew/3.12.html

For the build logs, see:
https://copr-be.cloud.fedoraproject.org/results/@python/python3.12/fedora-rawhide-x86_64/05128960-python-inject/

For all our attempts to build python-inject with Python 3.12, see:
https://copr.fedorainfracloud.org/coprs/g/python/python3.12/package/python-inject/

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 3.12:
https://copr.fedorainfracloud.org/coprs/g/python/python3.12/

Let us know here if you have any questions.

Python 3.12 is planned to be included in Fedora 39. To make that update smoother, we're building Fedora packages with all pre-releases of Python 3.12.
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.