[Bug 2147343] Re: _uuid C extension module missing from libpython3.12-stdlib on Ubuntu 24.04 (Noble)

[Launchpad Bug Tracker]

This bug was fixed in the package python3.14 - 3.14.4-1

---------------
python3.14 (3.14.4-1) unstable; urgency=medium

  * Python 3.14.4 release.
  * Also post-process the _sysconfig_vars_*.json files, like done for the
    _sysconfigdata_*.py files.
  * Fix the base_interpreter path in the build-details_*.json files.
  * Don't ship the build-details_*.json file for the debug interpreter,
    because it is installed under the same name as the one for the normal
    build. Still has different contents. PEP 739 deficiency ...
  * Explicitly build-depend on uuid-dev. LP: #2147343.
  * Update VCS attributes

 -- Matthias Klose <doko at debian.org>  Wed, 08 Apr 2026 06:02:31 +0200

** Changed in: python3.14 (Ubuntu)
       Status: New => Fix Released

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Title:
  _uuid C extension module missing from libpython3.12-stdlib on Ubuntu
  24.04 (Noble)

Status in python3.12 package in Ubuntu:
  New
Status in python3.14 package in Ubuntu:
  Fix Released

Bug description:
  The _uuid C extension module is not included in the libpython3.12-stdlib 
  package (3.12.3-1ubuntu0.12) on Ubuntu 24.04 amd64.

  Impact not on earlier versions using earlier versions of Ubuntu LTS,
  such as 22.04.

  This module is built by CPython's when uuid-dev (libuuid headers)  is
  available at compile time. It provides the generate_time_safe()
  function, which wraps libuuid's uuid_generate_time_safe(), enabling
  uuid.uuid1() to return SafeUUID.safe when the uuidd daemon is running.

  Without _uuid.cpython-312-x86_64-linux-gnu.so in lib-dynload/,
  Python's uuid module falls back to pure-Python UUID generation, which
  always returns  SafeUUID.unknown, even when uuidd is installed and
  running. This makes it impossible for applications to verify the UUID
  uniqueness safety.

  Steps to reproduce:
    1. Fresh Ubuntu 24.04 install with python3.12 (default)
    2. apt install uuid-runtime
    3. systemctl start uuidd
    4. python3 -c "import uuid; print(uuid.uuid1().is_safe)"

  Expected: SafeUUID.safe
  Actual: SafeUUID.unknown

  Cause: _uuid.cpython-312-x86_64-linux-gnu.so is not present in
  /usr/lib/python3.12/lib-dynload/. Confirmed by checking the official
  package file list at:
  https://packages.ubuntu.com/noble/amd64/libpython3.12-stdlib/filelist

  It is a critical feature for services that spawn multiple processes
  and need to create unique incremental UUIDs, such as UUID1 in this
  case. UUID4 does not solve the incremental part.

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