Another new AB-INT. This is probably related to #16184. I logged some errors in there, but the error is different enough so I create a separate entry.

ERROR: An uncaught exception occurred in runqueue
Traceback (most recent call last):
  File "/srv/pokybuild/yocto-worker/a-full/build/layers/bitbake/lib/bb/runqueue.py", line 1663, in execute_runqueue
    return self._execute_runqueue()
           ~~~~~~~~~~~~~~~~~~~~~~^^
  File "/srv/pokybuild/yocto-worker/a-full/build/layers/bitbake/lib/bb/runqueue.py", line 1607, in _execute_runqueue
    retval = self.dump_signatures(dumpsigs)
  File "/srv/pokybuild/yocto-worker/a-full/build/layers/bitbake/lib/bb/runqueue.py", line 1718, in dump_signatures
    p.start()
    ~~~~~~~^^
  File "/usr/lib64/python3.14/multiprocessing/process.py", line 121, in start
    self._popen = self._Popen(self)
                  ~~~~~~~~~~~^^^^^^
  File "/usr/lib64/python3.14/multiprocessing/context.py", line 224, in _Popen
    return _default_context.get_context().Process._Popen(process_obj)
           ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^
  File "/usr/lib64/python3.14/multiprocessing/context.py", line 300, in _Popen
    return Popen(process_obj)
  File "/usr/lib64/python3.14/multiprocessing/popen_forkserver.py", line 35, in __init__
    super().__init__(process_obj)
    ~~~~~~~~~~~~~~~~^^^^^^^^^^^^^
  File "/usr/lib64/python3.14/multiprocessing/popen_fork.py", line 20, in __init__
    self._launch(process_obj)
    ~~~~~~~~~~~~^^^^^^^^^^^^^
  File "/usr/lib64/python3.14/multiprocessing/popen_forkserver.py", line 47, in _launch
    reduction.dump(process_obj, buf)
    ~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^
  File "/usr/lib64/python3.14/multiprocessing/reduction.py", line 60, in dump
    ForkingPickler(file, protocol).dump(obj)
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^
  File "/usr/lib64/python3.14/multiprocessing/synchronize.py", line 109, in __getstate__
    raise RuntimeError('A SemLock created in a fork context is being '
    ...<2 lines>...
                       'multiprocessing objects and Process.')
RuntimeError: A SemLock created in a fork context is being shared with a process in a spawn context. This is not supported. Please use the same context to create multiprocessing objects and Process.
when serializing dict item 'rlock'
when serializing bb.server.process.ConnectionReader state
when serializing bb.server.process.ConnectionReader object
when serializing dict item 'command_channel'
when serializing bb.server.process.ProcessServer state
when serializing bb.server.process.ProcessServer object
when serializing dict item 'process_server'
when serializing bb.cooker.BBCooker state
when serializing bb.cooker.BBCooker object
when serializing dict item 'cooker'
when serializing bb.runqueue.RunQueue state
when serializing bb.runqueue.RunQueue object
when serializing tuple item 0
when serializing method reconstructor arguments
when serializing method object
when serializing dict item '_target'
when serializing multiprocessing.context.Process state
when serializing multiprocessing.context.Process object