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Bug 1958928 - python-subprocess-tee fails to build with Python 3.10: DeprecationWarning: There is no current event loop (treated as error) [NEEDINFO]
Summary: python-subprocess-tee fails to build with Python 3.10: DeprecationWarning: T...
Alias: None
Product: Fedora
Classification: Fedora
Component: python-subprocess-tee
Version: rawhide
Hardware: Unspecified
OS: Unspecified
Target Milestone: ---
Assignee: chedi toueiti
QA Contact: Fedora Extras Quality Assurance
: 1969147 (view as bug list)
Depends On:
Blocks: PYTHON3.10 F35FTBFS, RAWHIDEFTBFS F35FailsToInstall, RAWHIDEFailsToInstall
TreeView+ depends on / blocked
Reported: 2021-05-10 12:44 UTC by Miro Hrončok
Modified: 2021-06-16 05:43 UTC (History)
3 users (show)

Fixed In Version:
Doc Type: If docs needed, set a value
Doc Text:
Clone Of:
Last Closed:
Type: Bug
mhroncok: needinfo? (chedi.toueiti)

Attachments (Terms of Use)

Description Miro Hrončok 2021-05-10 12:44:16 UTC
python-subprocess-tee fails to build with Python 3.10.0b1:

_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 
args = 'echo 123', kwargs = {}, cmd = 'echo 123'
    def run(args: Union[str, List[str]], **kwargs: Any) -> CompletedProcess:
        """Drop-in replacement for that behaves like tee.
        Extra arguments added by our version:
        echo: False - Prints command before executing it.
        quiet: False - Avoid printing output
        if isinstance(args, str):
            cmd = args
            # run was called with a list instead of a single item but asyncio
            # create_subprocess_shell requires command as a single string, so
            # we need to convert it to string
            cmd = join(args)
        if kwargs.get("echo", False):
            print(f"COMMAND: {cmd}")
>       loop = asyncio.get_event_loop()
E       DeprecationWarning: There is no current event loop

FAILED lib/subprocess_tee/test/ - Deprecati...
FAILED lib/subprocess_tee/test/ - Depr...
FAILED lib/subprocess_tee/test/ - DeprecationWar...
FAILED lib/subprocess_tee/test/ - DeprecationWarni...
FAILED lib/subprocess_tee/test/ - DeprecationWarni...
FAILED lib/subprocess_tee/test/[auto] - Deprec...
FAILED lib/subprocess_tee/test/[sh] - Deprecat...
FAILED lib/subprocess_tee/test/[bash] - Deprec...
FAILED lib/subprocess_tee/test/[zsh] - Depreca...
FAILED lib/subprocess_tee/test/ - DeprecationWarn...
FAILED lib/subprocess_tee/test/ - Depre...
FAILED lib/subprocess_tee/test/ - DeprecationWarnin...
============================== 12 failed in 0.39s ==============================
asyncio.get_event_loop() now emits a deprecation warning if there is no running event loop. In the future it will be an alias of get_running_loop(). asyncio functions which implicitly create a Future or Task objects now emit a deprecation warning if there is no running event loop and no explicit loop argument is passed: ensure_future(), wrap_future(), gather(), shield(), as_completed() and constructors of Future, Task, StreamReader, StreamReaderProtocol.

For the build logs, see:

For all our attempts to build python-subprocess-tee with Python 3.10, see:

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 3.10:

Let us know here if you have any questions.

Python 3.10 will be included in Fedora 35. To make that update smoother, we're building Fedora packages with early pre-releases of Python 3.10.
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.

Comment 1 Miro Hrončok 2021-06-04 20:14:53 UTC
This is a mass-posted update. Sorry if it is not 100% accurate to this bugzilla.

The Python 3.10 rebuild is in progress in a Koji side tag. If you manage to fix the problem, please commit the fix in the rawhide branch, but don't build the package in regular rawhide.

You can either build the package in the side tag, with:

    $ fedpkg build --target=f35-python

Or you can the build and we will eventually build it for you.

Note that the rebuild is still in progress, so not all (build) dependencies of this package might be available right away.


See also

If you have general questions about the rebuild, please use this mailing list thread:

Comment 2 Miro Hrončok 2021-06-07 22:59:25 UTC
The f35-python side tag has been merged to Rawhide. From now on, build as you would normally build.

Comment 3 Miro Hrončok 2021-06-08 11:33:59 UTC
*** Bug 1969147 has been marked as a duplicate of this bug. ***

Comment 4 Miro Hrončok 2021-06-15 20:27:48 UTC

This is the first reminder (step 3 from

If you know about this problem and are planning on fixing it, please acknowledge so by setting the bug status to ASSIGNED. If you don't have time to maintain this package, consider orphaning it, so maintainers of dependent packages realize the problem.

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