Your message dated Wed, 16 Sep 2026 10:49:02 +0000
with message-id <[email protected]>
and subject line Bug#1144997: fixed in python-websockets 17.1-1
has caused the Debian Bug report #1144997,
regarding python-websockets: FTBFS building against python 3.15
to be marked as done.
This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.
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--
1144997: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1144997
Debian Bug Tracking System
Contact [email protected] with problems
--- Begin Message ---
Package: src:python-websockets
Version: 16.0-1
User: [email protected]
Usertags: python3.15
Tags: patch
Hi!
While rebuilding the python related packages against the python version
3.15rc1 we found that python-websocket fails to build from source [1].
This is due to a change in 3.15 in the requirements on how the buffers need to
be present in memory. Upstream already applied a fix for this included
in the release 16.1.
I'm attaching the upstream patch that I'm using the sandbox, please
consider either adding this patch or updating the version.
Happy hacking,
[1]: https://debusine.debian.net/debian/r-python-python3.15/work-request/999586/
--
"Can you imagine what I would do if I could do all I can?" -- Sun Tzu
Saludos /\/\ /\ >< `/
commit f3bf8033276aa4fc272940e650c319c517bb3479
Author: Lumir Balhar <[email protected]>
Date: Tue Apr 7 09:16:08 2026 +0200
Python 3.15+ requires C-contiguous buffers for int.from_bytes()
diff --git a/src/websockets/utils.py b/src/websockets/utils.py
index b2a90e52..84904ea0 100644
--- a/src/websockets/utils.py
+++ b/src/websockets/utils.py
@@ -47,6 +47,14 @@ def apply_mask(data: BytesLike, mask: bytes | bytearray) -> bytes:
if len(mask) != 4:
raise ValueError("mask must contain 4 bytes")
+ # Python 3.15+ requires C-contiguous buffers for int.from_bytes()
+ # CPython (https://github.com/python/cpython/pull/132109) optimized
+ # int.from_bytes() to use the buffer protocol with PyBUF_SIMPLE, which requires
+ # C-contiguous buffers. Non-contiguous memoryviews (e.g., created by [::-1])
+ # now raise BufferError. Convert to bytes to create a contiguous copy.
+ if isinstance(data, memoryview) and not data.c_contiguous:
+ data = bytes(data)
+
data_int = int.from_bytes(data, sys.byteorder)
mask_repeated = mask * (len(data) // 4) + mask[: len(data) % 4]
mask_int = int.from_bytes(mask_repeated, sys.byteorder)
--- End Message ---
--- Begin Message ---
Source: python-websockets
Source-Version: 17.1-1
Done: Dale Richards <[email protected]>
We believe that the bug you reported is fixed in the latest version of
python-websockets, which is due to be installed in the Debian FTP archive.
A summary of the changes between this version and the previous one is
attached.
Thank you for reporting the bug, which will now be closed. If you
have further comments please address them to [email protected],
and the maintainer will reopen the bug report if appropriate.
Debian distribution maintenance software
pp.
Dale Richards <[email protected]> (supplier of updated python-websockets
package)
(This message was generated automatically at their request; if you
believe that there is a problem with it please contact the archive
administrators by mailing [email protected])
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA512
Format: 1.8
Date: Wed, 16 Sep 2026 10:32:32 +0000
Source: python-websockets
Built-For-Profiles: noudeb
Architecture: source
Version: 17.1-1
Distribution: unstable
Urgency: medium
Maintainer: Piotr Ożarowski <[email protected]>
Changed-By: Dale Richards <[email protected]>
Closes: 1144997
Changes:
python-websockets (17.1-1) unstable; urgency=medium
.
* Team upload.
* New upstream release.
- Fixes the FTBFS against Python 3.15 (Closes: #1144997)
* d/watch: convert to version 5 and follow the upstream repository
move to github.com/python-websockets.
* d/gbp.conf: add, recording the branch layout and pristine-tar use.
* d/source/options: drop; --git-ignore-new is a git-buildpackage
option, not a dpkg-source one, and dpkg-source warned about it on
every build.
* d/control: bump Standards-Version to 4.7.4, no changes needed.
* d/control: bump debhelper compat level to 14 and drop
${misc:Depends}, which dh_gencontrol now adds by itself.
* d/control: build-depend on dh-sequence-python3 rather than dh-
python, and drop the now redundant --with python3 from d/rules.
* d/control: build-depend on dh-sequence-single-binary; debhelper warns that
it will stop activating the addon implicitly in compat 15.
* d/control: build-depend on pybuild-plugin-pyproject so the package
is built through its declared PEP 517 backend and ships .dist-info
instead of a legacy .egg-info.
* d/control: build-depend on python3-trio; websockets 17.0 adds a trio
implementation whose tests import trio unconditionally.
* d/control: mark the test-only build dependencies <!nocheck>.
* d/control: switch Testsuite to autopkgtest-pkg-pybuild, which runs
the upstream test suite against the installed package.
* d/control: drop Priority and Rules-Requires-Root, both dpkg defaults
now.
* d/control: update Homepage for the upstream repository move.
* d/control: suggest python3-trio and python3-python-socks, needed for
the trio implementation and for SOCKS proxy support respectively.
* d/control: refresh the package description; websockets now ships
asyncio, threading and trio implementations plus a Sans-I/O layer.
* d/rules: set BUILD_EXTENSION=yes so a failure to compile the C
speedups extension fails the build instead of silently shipping a
pure-Python package on an Architecture: any package.
* d/rules: enable all hardening options for the C extension.
* d/rules: export the proxy variables empty instead of clearing them on a
dh_auto_test override, so that pybuild-autopkgtest gets them too, and
cover ws_proxy, wss_proxy and socks_proxy; websockets has consulted those
since 15.0.
* d/copyright: follow the upstream repository move, and sync the
Files: * copyright statement and the licence text with upstream's
LICENSE.
* d/upstream/metadata: follow the upstream repository move and add
Documentation.
* d/salsa-ci.yml: add, with a nocheck build profile job to exercise the
build profile restrictions.
* Add a manpage for the websockets interactive client.
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