Exception ignored in PyodideHandle.__del__ playwright._impl._errors.Error: Event loop is closed! Is Playwright already stopped?

Using a PyodideHandle in a fixture with the playwright runner, I am seeing a warning about an ignored exception when cleaning up the test.

Test case:

# tomtests/test_handle_bug.py
import pytest
from pytest_pyodide import run_in_pyodide


@pytest.fixture
@run_in_pyodide
def macguffin(selenium):
    from pytest_pyodide.decorator import PyodideHandle

    s = {"a": 1}
    return PyodideHandle(s)


@run_in_pyodide
def test_macguffin(selenium, macguffin):
    assert macguffin["a"] == 1

# uv sync --all-extras
# uv run pytest --runner playwright --rt chrome tomtests/

Also pushed here: https://github.com/tomjakubowski/pytest-pyodide/commit/23cd2191101cfb40eafab23bc9b9614b37361e4a

Error message:

Exception ignored in: <function PyodideHandle.__del__ at 0x101ffa3e0>
Traceback (most recent call last):
  File "/Users/tom/github.com/pyodide/pytest-pyodide/pytest_pyodide/decorator.py", line 88, in __del__
    self.selenium.run_js(
  File "/Users/tom/github.com/pyodide/pytest-pyodide/pytest_pyodide/runner.py", line 262, in run_js
    return self.run_js_inner(code, check_code)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/tom/github.com/pyodide/pytest-pyodide/pytest_pyodide/runner.py", line 415, in run_js_inner
    retval = self.driver.evaluate(wrapper % (code, check_code))
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/tom/github.com/pyodide/pytest-pyodide/.venv/lib/python3.12/site-packages/playwright/sync_api/_generated.py", line 8530, in evaluate
    self._sync(
  File "/Users/tom/github.com/pyodide/pytest-pyodide/.venv/lib/python3.12/site-packages/playwright/_impl/_sync_base.py", line 104, in _sync
    raise Error("Event loop is closed! Is Playwright already stopped?")
playwright._impl._errors.Error: Event loop is closed! Is Playwright already stopped?

Note that this doesn't cause the test to fail, and the exit code is 0.

I see a similar error message when running with --runner selenium:

Exception ignored in: <function PyodideHandle.__del__ at 0x1032263e0>
Traceback (most recent call last):
  File "/Users/tom/github.com/pyodide/pytest-pyodide/pytest_pyodide/decorator.py", line 88, in __del__
    self.selenium.run_js(
  File "/Users/tom/github.com/pyodide/pytest-pyodide/pytest_pyodide/runner.py", line 262, in run_js
    return self.run_js_inner(code, check_code)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/tom/github.com/pyodide/pytest-pyodide/pytest_pyodide/runner.py", line 362, in run_js_inner
    retval = self.driver.execute_async_script(wrapper % (code, check_code))
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/tom/github.com/pyodide/pytest-pyodide/.venv/lib/python3.12/site-packages/selenium/webdriver/remote/webdriver.py", line 550, in execute_async_script
    return self.execute(command, {"script": script, "args": converted_args})["value"]
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/tom/github.com/pyodide/pytest-pyodide/.venv/lib/python3.12/site-packages/selenium/webdriver/remote/webdriver.py", line 427, in execute
    response = self.command_executor.execute(driver_command, params)
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/tom/github.com/pyodide/pytest-pyodide/.venv/lib/python3.12/site-packages/selenium/webdriver/remote/remote_connection.py", line 404, in execute
    return self._request(command_info[0], url, body=data)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/tom/github.com/pyodide/pytest-pyodide/.venv/lib/python3.12/site-packages/selenium/webdriver/remote/remote_connection.py", line 428, in _request
    response = self._conn.request(method, url, body=body, headers=headers, timeout=self._client_config.timeout)
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/tom/github.com/pyodide/pytest-pyodide/.venv/lib/python3.12/site-packages/urllib3/_request_methods.py", line 143, in request
    return self.request_encode_body(
           ^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/tom/github.com/pyodide/pytest-pyodide/.venv/lib/python3.12/site-packages/urllib3/_request_methods.py", line 278, in request_encode_body
    return self.urlopen(method, url, **extra_kw)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/tom/github.com/pyodide/pytest-pyodide/.venv/lib/python3.12/site-packages/urllib3/poolmanager.py", line 443, in urlopen
    response = conn.urlopen(method, u.request_uri, **kw)
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/tom/github.com/pyodide/pytest-pyodide/.venv/lib/python3.12/site-packages/urllib3/connectionpool.py", line 871, in urlopen
    return self.urlopen(
           ^^^^^^^^^^^^^
  File "/Users/tom/github.com/pyodide/pytest-pyodide/.venv/lib/python3.12/site-packages/urllib3/connectionpool.py", line 871, in urlopen
    return self.urlopen(
           ^^^^^^^^^^^^^
  File "/Users/tom/github.com/pyodide/pytest-pyodide/.venv/lib/python3.12/site-packages/urllib3/connectionpool.py", line 871, in urlopen
    return self.urlopen(
           ^^^^^^^^^^^^^
  File "/Users/tom/github.com/pyodide/pytest-pyodide/.venv/lib/python3.12/site-packages/urllib3/connectionpool.py", line 841, in urlopen
    retries = retries.increment(
              ^^^^^^^^^^^^^^^^^^
  File "/Users/tom/github.com/pyodide/pytest-pyodide/.venv/lib/python3.12/site-packages/urllib3/util/retry.py", line 519, in increment
    raise MaxRetryError(_pool, url, reason) from reason  # type: ignore[arg-type]
    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
urllib3.exceptions.MaxRetryError: HTTPConnectionPool(host='localhost', port=60847): Max retries exceeded with url: /session/d6624be6a6c2269e04186b871e101b60/execute/async (Caused by NewConnectionError('<urllib3.connection.HTTPConnection object at 0x1034bb7a0>: Failed to establish a new connection: [Errno 61] Connection refused'))

I think that the handle's finalizer is being called after the event loop is closed, and the call to eval the reference count decrement is what's throwing.

Start with PyodideHandle.del in pytest_pyodide/decorator.py and the run_js paths in pytest_pyodide/runner.py. Reproduce the fixture with the provided pytest commands using the Playwright and Selenium runners. Done means cleanup no longer emits an ignored exception after the browser or event loop has closed, while the test still exits successfully.