Re: [yocto] Arch Linux - Python Newer than Recommend i.e. post 3.12

Which version of yocto/bitbake are you using? Can you check if the
issue triggers on latest master of bitbake/oe-core?

Alex

On Thu, 5 Feb 2026 at 03:37, Nicholas Krause via
lists.yoctoproject.org <[email protected]>
wrote:
>
> Greetings,
> I'm getting this on Arch:
> bitbake core-image-full-cmdline
> Traceback (most recent call last):
>    File "/home/npkrause/poky/bitbake/bin/bitbake", line 36, in <module>
>      sys.exit(bitbake_main(BitBakeConfigParameters(sys.argv),
>               ~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
>                            cookerdata.CookerConfiguration()))
>                            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
>    File "/home/npkrause/poky/bitbake/lib/bb/main.py", line 378, in
> bitbake_main
>      return ui_module.main(server_connection.connection,
> server_connection.events,
>
> ~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
>                            configParams)
>                            ^^^^^^^^^^^^^
>    File "/home/npkrause/poky/bitbake/lib/bb/ui/knotty.py", line 415, in main
>      params.updateToServer(server, os.environ.copy())
>      ~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^
>    File "/home/npkrause/poky/bitbake/lib/bb/cookerdata.py", line 75, in
> updateToServer
>      raise Exception("Unable to update the server configuration with
> local parameters: %s" % error)
> Exception: Unable to update the server configuration with local
> parameters: Traceback (most recent call last):
>    File "/home/npkrause/poky/bitbake/lib/bb/command.py", line 90, in
> runCommand
>      result = command_method(self, commandline)
>    File "/home/npkrause/poky/bitbake/lib/bb/command.py", line 286, in
> updateConfig
>      command.cooker.updateConfigOpts(options, environment, cmdline)
>      ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
>    File "/home/npkrause/poky/bitbake/lib/bb/cooker.py", line 535, in
> updateConfigOpts
>      self.reset()
>      ~~~~~~~~~~^^
>    File "/home/npkrause/poky/bitbake/lib/bb/cooker.py", line 1775, in reset
>      self.handlePRServ()
>      ~~~~~~~~~~~~~~~~~^^
>    File "/home/npkrause/poky/bitbake/lib/bb/cooker.py", line 437, in
> handlePRServ
>      self.hashserv.serve_as_process()
>      ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^
>    File "/home/npkrause/poky/bitbake/lib/bb/asyncrpc/serv.py", line 280,
> in serve_as_process
>      self.process.start()
>      ~~~~~~~~~~~~~~~~~~^^
>    File "/usr/lib/python3.14/multiprocessing/process.py", line 121, in start
>      self._popen = self._Popen(self)
>                    ~~~~~~~~~~~^^^^^^
>    File "/usr/lib/python3.14/multiprocessing/context.py", line 224, in
> _Popen
>      return _default_context.get_context().Process._Popen(process_obj)
>             ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^
>    File "/usr/lib/python3.14/multiprocessing/context.py", line 300, in
> _Popen
>      return Popen(process_obj)
>    File "/usr/lib/python3.14/multiprocessing/popen_forkserver.py", line
> 35, in __init__
>      super().__init__(process_obj)
>      ~~~~~~~~~~~~~~~~^^^^^^^^^^^^^
>    File "/usr/lib/python3.14/multiprocessing/popen_fork.py", line 20, in
> __init__
>      self._launch(process_obj)
>      ~~~~~~~~~~~~^^^^^^^^^^^^^
>    File "/usr/lib/python3.14/multiprocessing/popen_forkserver.py", line
> 47, in _launch
>      reduction.dump(process_obj, buf)
>      ~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^
>    File "/usr/lib/python3.14/multiprocessing/reduction.py", line 60, in dump
>      ForkingPickler(file, protocol).dump(obj)
>      ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^
> _pickle.PicklingError: Can't pickle local object <function
> AsyncServer.serve_as_process.<locals>.run at 0x7fea88598a90>
> when serializing dict item '_target'
> when serializing multiprocessing.context.Process state
>
> Due to being on Python 3.14. I would prefer not to have to use a
> backwards supported penv for Yocto alone. Does anyone have any
> experience with working on Arch and how to avoid these issues without
> either dealing with penv or yay for getting a older version of python,
> pre 3.12 I believe.
> Thanks,
> Nick
>
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