setup-plan option make event_loop become tuple

Hello, I run: pytest --setup-plan -sv tests/test.py in container image python:3.11 and received the following error:

==================================== test session starts ====================================
platform linux -- Python 3.11.6, pytest-7.4.2, pluggy-1.3.0 -- /usr/local/bin/python
cachedir: .pytest_cache
rootdir: /root
plugins: asyncio-0.21.1
asyncio: mode=Mode.STRICT
collected 1 item

tests/test.py::test_hello
        SETUP    F event_loopERROR
        TEARDOWN F event_loop

========================================== ERRORS ===========================================
_______________________________ ERROR at setup of test_hello ________________________________

fixturedef = <FixtureDef argname='event_loop' scope='function' baseid=''>
request = <SubRequest 'event_loop' for <Function test_hello>>

    @pytest.hookimpl(hookwrapper=True)
    def pytest_fixture_setup(
        fixturedef: FixtureDef, request: SubRequest
    ) -> Optional[object]:
        """Adjust the event loop policy when an event loop is produced."""
        if fixturedef.argname == "event_loop":
            # The use of a fixture finalizer is preferred over the
            # pytest_fixture_post_finalizer hook. The fixture finalizer is invoked once
            # for each fixture, whereas the hook may be invoked multiple times for
            # any specific fixture.
            # see https://github.com/pytest-dev/pytest/issues/5848
            _add_finalizers(
                fixturedef,
                _close_event_loop,
                _provide_clean_event_loop,
            )
            outcome = yield
            loop = outcome.get_result()
            policy = asyncio.get_event_loop_policy()
            try:
                with warnings.catch_warnings():
                    warnings.simplefilter("ignore", DeprecationWarning)
                    old_loop = policy.get_event_loop()
                if old_loop is not loop:
                    old_loop.close()
            except RuntimeError:
                # Either the current event loop has been set to None
                # or the loop policy doesn't specify to create new loops
                # or we're not in the main thread
                pass
>           policy.set_event_loop(loop)

/usr/local/lib/python3.11/site-packages/pytest_asyncio/plugin.py:410:
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
/usr/local/lib/python3.11/asyncio/unix_events.py:1457: in set_event_loop
    super().set_event_loop(loop)
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

self = <asyncio.unix_events._UnixDefaultEventLoopPolicy object at 0x7f5144eb8c10>
loop = (None, 0, None)

    def set_event_loop(self, loop):
        """Set the event loop."""
        self._local._set_called = True
        if loop is not None and not isinstance(loop, AbstractEventLoop):
>           raise TypeError(f"loop must be an instance of AbstractEventLoop or None, not '{type(loop).__name__}'")
E           TypeError: loop must be an instance of AbstractEventLoop or None, not 'tuple'

/usr/local/lib/python3.11/asyncio/events.py:686: TypeError
================================== short test summary info ==================================
ERROR tests/test.py::test_hello - TypeError: loop must be an instance of AbstractEventLoop or None, not 'tuple'
===================================== 1 error in 0.04s ======================================

It seems that --setup-plan caused loop value became (None, 0, None) instead of event loop instance.

Here is tests/test.py:

import pytest

@pytest.mark.asyncio
async def test_hello():
    print("Hello")

Python version: 3.11.6 pip freeze:

iniconfig==2.0.0
packaging==23.2
pluggy==1.3.0
pytest==7.4.2
pytest-asyncio==0.21.1

pytest-dev / pytest-asyncio

setup-plan option make event_loop become tuple #630