[Bug 2143758] [NEW] apport 2.33.1-0ubuntu4 FTBFS - PicklingIssue in Tests
Thomas Ward
2143758 at bugs.launchpad.net
Mon Mar 9 17:51:14 UTC 2026
Public bug reported:
During the global rebuild of Apport (2.33.1-0ubuntu4) for
https://launchpad.net/bugs/2132257, it FTBFS with the following errors:
=================================== FAILURES ===================================
__________ TestUnkillableShutdown.test_omit_all_processes_except_one ___________
self =
<tests.integration.test_unkillable_shutdown.TestUnkillableShutdown
testMethod=test_omit_all_processes_except_one>
def test_omit_all_processes_except_one(self) -> None:
"""unkillable_shutdown will write exactly one report."""
existing_pids = self._get_all_pids()
> with self._launch_process_with_different_session_id() as runner:
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
tests/integration/test_unkillable_shutdown.py:98:
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
/usr/lib/python3.14/contextlib.py:141: in __enter__
return next(self.gen)
^^^^^^^^^^^^^^
tests/integration/test_unkillable_shutdown.py:79: in _launch_process_with_different_session_id
runner.start()
/usr/lib/python3.14/multiprocessing/process.py:121: in start
self._popen = self._Popen(self)
^^^^^^^^^^^^^^^^^
/usr/lib/python3.14/multiprocessing/context.py:224: in _Popen
return _default_context.get_context().Process._Popen(process_obj)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
/usr/lib/python3.14/multiprocessing/context.py:300: in _Popen
return Popen(process_obj)
^^^^^^^^^^^^^^^^^^
/usr/lib/python3.14/multiprocessing/popen_forkserver.py:35: in __init__
super().__init__(process_obj)
/usr/lib/python3.14/multiprocessing/popen_fork.py:20: in __init__
self._launch(process_obj)
/usr/lib/python3.14/multiprocessing/popen_forkserver.py:47: in _launch
reduction.dump(process_obj, buf)
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
obj = <Process name='Process-1' parent=16049 initial>
file = <_io.BytesIO object at 0x762709abffb0>, protocol = None
def dump(obj, file, protocol=None):
'''Replacement for pickle.dump() using ForkingPickler.'''
> ForkingPickler(file, protocol).dump(obj)
E _pickle.PicklingError: Can't pickle local object <function TestUnkillableShutdown._launch_process_with_different_session_id.<locals>._run_test_executable at 0x76270951ce00>
E when serializing dict item '_target'
E when serializing multiprocessing.context.Process state
E when serializing multiprocessing.context.Process object
/usr/lib/python3.14/multiprocessing/reduction.py:60: PicklingError
__________________ TestUnkillableShutdown.test_write_reports ___________________
self =
<tests.integration.test_unkillable_shutdown.TestUnkillableShutdown
testMethod=test_write_reports>
def test_write_reports(self) -> None:
"""unkillable_shutdown will write reports."""
# Ensure that at least one process is honoured by unkillable_shutdown.
> with self._launch_process_with_different_session_id():
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
tests/integration/test_unkillable_shutdown.py:108:
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
/usr/lib/python3.14/contextlib.py:141: in __enter__
return next(self.gen)
^^^^^^^^^^^^^^
tests/integration/test_unkillable_shutdown.py:79: in _launch_process_with_different_session_id
runner.start()
/usr/lib/python3.14/multiprocessing/process.py:121: in start
self._popen = self._Popen(self)
^^^^^^^^^^^^^^^^^
/usr/lib/python3.14/multiprocessing/context.py:224: in _Popen
return _default_context.get_context().Process._Popen(process_obj)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
/usr/lib/python3.14/multiprocessing/context.py:300: in _Popen
return Popen(process_obj)
^^^^^^^^^^^^^^^^^^
/usr/lib/python3.14/multiprocessing/popen_forkserver.py:35: in __init__
super().__init__(process_obj)
/usr/lib/python3.14/multiprocessing/popen_fork.py:20: in __init__
self._launch(process_obj)
/usr/lib/python3.14/multiprocessing/popen_forkserver.py:47: in _launch
reduction.dump(process_obj, buf)
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
obj = <Process name='Process-2' parent=16049 initial>
file = <_io.BytesIO object at 0x76270a723100>, protocol = None
def dump(obj, file, protocol=None):
'''Replacement for pickle.dump() using ForkingPickler.'''
> ForkingPickler(file, protocol).dump(obj)
E _pickle.PicklingError: Can't pickle local object <function TestUnkillableShutdown._launch_process_with_different_session_id.<locals>._run_test_executable at 0x762709aae1f0>
E when serializing dict item '_target'
E when serializing multiprocessing.context.Process state
E when serializing multiprocessing.context.Process object
/usr/lib/python3.14/multiprocessing/reduction.py:60: PicklingError
---
The core problem is a Pickling Error on these two tests. This results
in an FTBFS case.
** Affects: apport (Ubuntu)
Importance: Critical
Status: New
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https://bugs.launchpad.net/bugs/2143758
Title:
apport 2.33.1-0ubuntu4 FTBFS - PicklingIssue in Tests
Status in apport package in Ubuntu:
New
Bug description:
During the global rebuild of Apport (2.33.1-0ubuntu4) for
https://launchpad.net/bugs/2132257, it FTBFS with the following
errors:
=================================== FAILURES ===================================
__________ TestUnkillableShutdown.test_omit_all_processes_except_one ___________
self =
<tests.integration.test_unkillable_shutdown.TestUnkillableShutdown
testMethod=test_omit_all_processes_except_one>
def test_omit_all_processes_except_one(self) -> None:
"""unkillable_shutdown will write exactly one report."""
existing_pids = self._get_all_pids()
> with self._launch_process_with_different_session_id() as runner:
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
tests/integration/test_unkillable_shutdown.py:98:
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
/usr/lib/python3.14/contextlib.py:141: in __enter__
return next(self.gen)
^^^^^^^^^^^^^^
tests/integration/test_unkillable_shutdown.py:79: in _launch_process_with_different_session_id
runner.start()
/usr/lib/python3.14/multiprocessing/process.py:121: in start
self._popen = self._Popen(self)
^^^^^^^^^^^^^^^^^
/usr/lib/python3.14/multiprocessing/context.py:224: in _Popen
return _default_context.get_context().Process._Popen(process_obj)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
/usr/lib/python3.14/multiprocessing/context.py:300: in _Popen
return Popen(process_obj)
^^^^^^^^^^^^^^^^^^
/usr/lib/python3.14/multiprocessing/popen_forkserver.py:35: in __init__
super().__init__(process_obj)
/usr/lib/python3.14/multiprocessing/popen_fork.py:20: in __init__
self._launch(process_obj)
/usr/lib/python3.14/multiprocessing/popen_forkserver.py:47: in _launch
reduction.dump(process_obj, buf)
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
obj = <Process name='Process-1' parent=16049 initial>
file = <_io.BytesIO object at 0x762709abffb0>, protocol = None
def dump(obj, file, protocol=None):
'''Replacement for pickle.dump() using ForkingPickler.'''
> ForkingPickler(file, protocol).dump(obj)
E _pickle.PicklingError: Can't pickle local object <function TestUnkillableShutdown._launch_process_with_different_session_id.<locals>._run_test_executable at 0x76270951ce00>
E when serializing dict item '_target'
E when serializing multiprocessing.context.Process state
E when serializing multiprocessing.context.Process object
/usr/lib/python3.14/multiprocessing/reduction.py:60: PicklingError
__________________ TestUnkillableShutdown.test_write_reports ___________________
self =
<tests.integration.test_unkillable_shutdown.TestUnkillableShutdown
testMethod=test_write_reports>
def test_write_reports(self) -> None:
"""unkillable_shutdown will write reports."""
# Ensure that at least one process is honoured by unkillable_shutdown.
> with self._launch_process_with_different_session_id():
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
tests/integration/test_unkillable_shutdown.py:108:
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
/usr/lib/python3.14/contextlib.py:141: in __enter__
return next(self.gen)
^^^^^^^^^^^^^^
tests/integration/test_unkillable_shutdown.py:79: in _launch_process_with_different_session_id
runner.start()
/usr/lib/python3.14/multiprocessing/process.py:121: in start
self._popen = self._Popen(self)
^^^^^^^^^^^^^^^^^
/usr/lib/python3.14/multiprocessing/context.py:224: in _Popen
return _default_context.get_context().Process._Popen(process_obj)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
/usr/lib/python3.14/multiprocessing/context.py:300: in _Popen
return Popen(process_obj)
^^^^^^^^^^^^^^^^^^
/usr/lib/python3.14/multiprocessing/popen_forkserver.py:35: in __init__
super().__init__(process_obj)
/usr/lib/python3.14/multiprocessing/popen_fork.py:20: in __init__
self._launch(process_obj)
/usr/lib/python3.14/multiprocessing/popen_forkserver.py:47: in _launch
reduction.dump(process_obj, buf)
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
obj = <Process name='Process-2' parent=16049 initial>
file = <_io.BytesIO object at 0x76270a723100>, protocol = None
def dump(obj, file, protocol=None):
'''Replacement for pickle.dump() using ForkingPickler.'''
> ForkingPickler(file, protocol).dump(obj)
E _pickle.PicklingError: Can't pickle local object <function TestUnkillableShutdown._launch_process_with_different_session_id.<locals>._run_test_executable at 0x762709aae1f0>
E when serializing dict item '_target'
E when serializing multiprocessing.context.Process state
E when serializing multiprocessing.context.Process object
/usr/lib/python3.14/multiprocessing/reduction.py:60: PicklingError
---
The core problem is a Pickling Error on these two tests. This results
in an FTBFS case.
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