Flaky test_run_spec #6549

________________________________ test_run_spec _________________________________
cls = <class '_pytest.runner.CallInfo'>
func = <function call_runtest_hook.<locals>.<lambda> at 0x7fc973e95940>
when = 'call'
reraise = (<class '_pytest.outcomes.Exit'>, <class 'KeyboardInterrupt'>)
@classmethod
deffrom_call(
cls,
        func: "Callable[[], TResult]",
        when: "Literal['collect', 'setup', 'call', 'teardown']",
        reraise: Optional[
            Union[Type[BaseException], Tuple[Type[BaseException], ...]]
        ] = None,
    ) -> "CallInfo[TResult]":
"""Call func, wrapping the result in a CallInfo.
    :param func:
        The function to call. Called without arguments.
    :param when:
        The phase in which the function is called.
    :param reraise:
        Exception or exceptions that shall propagate if raised by the
        function, instead of being wrapped in the CallInfo.
    """
        excinfo = None
        start = timing.time()
        precise_start = timing.perf_counter()
try:
>           result: Optional[TResult] = func()
/usr/share/miniconda3/envs/dask-distributed/lib/python3.9/site-packages/_pytest/runner.py:338: 
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 
/usr/share/miniconda3/envs/dask-distributed/lib/python3.9/site-packages/_pytest/runner.py:259: in <lambda>
lambda: ihook(item=item, **kwds), when=when, reraise=reraise
/usr/share/miniconda3/envs/dask-distributed/lib/python3.9/site-packages/pluggy/_hooks.py:265: in __call__
returnself._hookexec(self.name, self.get_hookimpls(), kwargs, firstresult)
/usr/share/miniconda3/envs/dask-distributed/lib/python3.9/site-packages/pluggy/_manager.py:80: in _hookexec
returnself._inner_hookexec(hook_name, methods, kwargs, firstresult)
/usr/share/miniconda3/envs/dask-distributed/lib/python3.9/site-packages/_pytest/unraisableexception.py:88: in pytest_runtest_call
yield from unraisable_exception_runtest_hook()
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 
defunraisable_exception_runtest_hook() -> Generator[None, None, None]:
with catch_unraisable_exception() as cm:
yield
if cm.unraisable:
if cm.unraisable.err_msg isnotNone:
                    err_msg = cm.unraisable.err_msg
else:
                    err_msg = "Exception ignored in"
                msg = f"{err_msg}: {cm.unraisable.object!r}\n\n"
                msg += "".join(
                    traceback.format_exception(
                        cm.unraisable.exc_type,
                        cm.unraisable.exc_value,
                        cm.unraisable.exc_traceback,
                    )
                )
>               warnings.warn(pytest.PytestUnraisableExceptionWarning(msg))
E               pytest.PytestUnraisableExceptionWarning: Exception ignored in: <coroutine object TCP.write at 0x7fc97019e140>
E               
E               Traceback (most recent call last):
E                 File "/usr/share/miniconda3/envs/dask-distributed/lib/python3.9/warnings.py", line 506, in _warn_unawaited_coroutine
E                   warn(msg, category=RuntimeWarning, stacklevel=2, source=coro)
E               RuntimeWarning: coroutine 'TCP.write' was never awaited
/usr/share/miniconda3/envs/dask-distributed/lib/python3.9/site-packages/_pytest/unraisableexception.py:78: PytestUnraisableExceptionWarning