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Bug 1914246 - python-uvicorn fails to build with Python 3.10 due to problem in python-websockets: the *loop* parameter was removed from Lock()
Summary: python-uvicorn fails to build with Python 3.10 due to problem in python-webso...
Status: NEW
Alias: None
Product: Fedora
Classification: Fedora
Component: python-websockets
Version: rawhide
Hardware: Unspecified
OS: Unspecified
Target Milestone: ---
Assignee: Julien Enselme
QA Contact: Fedora Extras Quality Assurance
Depends On:
Blocks: PYTHON3.10
TreeView+ depends on / blocked
Reported: 2021-01-08 12:47 UTC by Miro Hrončok
Modified: 2021-06-07 22:59 UTC (History)
5 users (show)

Fixed In Version:
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Last Closed:
Type: Bug

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Description Miro Hrončok 2021-01-08 12:47:34 UTC
python-uvicorn fails to build with Python 3.10.0a4.

The tests hang, but when timeout is added, the error is:

Traceback (most recent call last):
  File "uvloop/handles/stream.pyx", line 829, in uvloop.loop.__uv_stream_on_read_impl
  File "/builddir/build/BUILD/uvicorn-0.12.2/uvicorn/protocols/http/", line 162, in data_received
  File "/builddir/build/BUILD/uvicorn-0.12.2/uvicorn/protocols/http/", line 211, in handle_events
  File "/builddir/build/BUILD/uvicorn-0.12.2/uvicorn/protocols/http/", line 288, in handle_upgrade
    protocol = self.ws_protocol_class(
  File "/builddir/build/BUILD/uvicorn-0.12.2/uvicorn/protocols/websockets/", line 57, in __init__
    super().__init__(ws_handler=self.ws_handler, ws_server=self.ws_server)
  File "/usr/lib64/python3.10/site-packages/websockets/", line 103, in __init__
  File "/usr/lib64/python3.10/site-packages/websockets/", line 235, in __init__
    self._drain_lock = asyncio.Lock(
  File "/usr/lib64/python3.10/asyncio/", line 77, in __init__
  File "/usr/lib64/python3.10/asyncio/", line 17, in __init__
    raise TypeError(
TypeError: As of 3.10, the *loop* parameter was removed from Lock() since it is no longer necessary

This comes from /usr/lib64/python3.10/site-packages/websockets/

For the build logs, see:

For all our attempts to build python-uvicorn 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 Ben Cotton 2021-02-09 15:38:22 UTC
This bug appears to have been reported against 'rawhide' during the Fedora 34 development cycle.
Changing version to 34.

Comment 2 Miro Hrončok 2021-06-04 20:14:25 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 3 Miro Hrončok 2021-06-07 22:59:04 UTC
The f35-python side tag has been merged to Rawhide. From now on, build as you would normally build.

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