16184 2026-02-27 10:46:28 +0000 AB-INT: bitbake: Can't pickle local object 2026-03-05 16:43:11 +0000 1 1 7 Build System, Metadata & Runtime BitBake bitbake unspecified x86 Multiple RESOLVED FIXED AB-INT Medium normal 6.0 1 mathieu.dubois-briand tgamblin poky.bs.watcher poky.watcher randy.macleod tgamblin --- --- No (bug/feature does not impact docs) oldest_to_newest 104440 0 mathieu.dubois-briand 2026-02-27 10:46:28 +0000 We saw this error 3 times since yesterday, both on master and on my branch. It looks related to meta-mingw, I now some changes were made recently. ERROR: An uncaught exception occurred in runqueue Traceback (most recent call last): File "/srv/pokybuild/yocto-worker/check-layer/build/layers/bitbake/lib/bb/runqueue.py", line 1663, in execute_runqueue return self._execute_runqueue() ~~~~~~~~~~~~~~~~~~~~~~^^ File "/srv/pokybuild/yocto-worker/check-layer/build/layers/bitbake/lib/bb/runqueue.py", line 1607, in _execute_runqueue retval = self.dump_signatures(dumpsigs) File "/srv/pokybuild/yocto-worker/check-layer/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) ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^ _pickle.PicklingError: Can't pickle local object <function CoreRecipeInfo.init_cacheData.<locals>.<lambda> at 0x7f7925667d70> when serializing tuple item 0 when serializing collections.defaultdict reconstructor arguments when serializing collections.defaultdict object when serializing dict item 'rundeps' when serializing bb.cache.CacheData state when serializing bb.cache.CacheData object when serializing dict item '' when serializing dict item 'recipecaches' 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 ERROR: Running idle function Traceback (most recent call last): File "/srv/pokybuild/yocto-worker/check-layer/build/layers/bitbake/lib/bb/server/process.py", line 418, in idle_thread_internal retval = function(self, data, False) File "/srv/pokybuild/yocto-worker/check-layer/build/layers/bitbake/lib/bb/cooker.py", line 1554, in buildTargetsIdle retval = rq.execute_runqueue() File "/srv/pokybuild/yocto-worker/check-layer/build/layers/bitbake/lib/bb/runqueue.py", line 1663, in execute_runqueue return self._execute_runqueue() ~~~~~~~~~~~~~~~~~~~~~~^^ File "/srv/pokybuild/yocto-worker/check-layer/build/layers/bitbake/lib/bb/runqueue.py", line 1607, in _execute_runqueue retval = self.dump_signatures(dumpsigs) File "/srv/pokybuild/yocto-worker/check-layer/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) ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^ _pickle.PicklingError: Can't pickle local object <function CoreRecipeInfo.init_cacheData.<locals>.<lambda> at 0x7f7925667d70> when serializing tuple item 0 when serializing collections.defaultdict reconstructor arguments when serializing collections.defaultdict object when serializing dict item 'rundeps' when serializing bb.cache.CacheData state when serializing bb.cache.CacheData object when serializing dict item '' when serializing dict item 'recipecaches' 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 Summary: There were 2 ERROR messages, returning a non-zero exit code. INFO: INFO: Summary of results: INFO: INFO: meta-mingw ... FAIL (Generating world signatures) 104441 1 mathieu.dubois-briand 2026-02-27 10:52:55 +0000 check-layer fedora43-vk-2 mathieu/master-next&mathieu/master-next-tests completed at 2026-02-27 09:29:35+00:00 https://autobuilder.yoctoproject.org/valkyrie/#/builders/27/builds/3252/steps/16/logs/stdio check-layer fedora43-vk-2 mathieu/master-next&mathieu/master-next-tests completed at 2026-02-26 18:32:48+00:00 https://autobuilder.yoctoproject.org/valkyrie/#/builders/27/builds/3247/steps/16/logs/stdio check-layer fedora43-vk-2 master completed at 2026-02-27 01:07:26+00:00 https://autobuilder.yoctoproject.org/valkyrie/#/builders/27/builds/3248/steps/16/logs/stdio 104454 2 mathieu.dubois-briand 2026-02-27 12:03:34 +0000 check-layer-nightly fedora43-vk-2 master completed at 2026-02-27 11:55:42+00:00 https://autobuilder.yoctoproject.org/valkyrie/#/builders/85/builds/1012/steps/28/logs/stdio A lot of things went wrong in this selftest build. Some errors definitely fall into this ticket, but I fear some are completely unrelated. oe-selftest-fedora fedora40-vk-4 mathieu/master-next completed at 2026-02-27 11:47:50+00:00 https://autobuilder.yoctoproject.org/valkyrie/#/builders/48/builds/3177/steps/15/logs/stdio 104464 3 mathieu.dubois-briand 2026-03-02 08:35:47 +0000 a-full fedora43-vk-2 mathieu/master-next completed at 2026-02-28 18:35:23+00:00 https://autobuilder.yoctoproject.org/valkyrie/#/builders/29/builds/3311/steps/31/logs/stdio check-layer-nightly fedora43-vk-2 master completed at 2026-02-27 11:55:42+00:00 https://autobuilder.yoctoproject.org/valkyrie/#/builders/85/builds/1012/steps/12/logs/stdio check-layer-nightly fedora43-vk-2 master completed at 2026-02-27 11:55:42+00:00 https://autobuilder.yoctoproject.org/valkyrie/#/builders/85/builds/1012/steps/14/logs/stdio check-layer-nightly fedora43-vk-2 master completed at 2026-02-27 11:55:42+00:00 https://autobuilder.yoctoproject.org/valkyrie/#/builders/85/builds/1012/steps/16/logs/stdio check-layer-nightly fedora43-vk-2 master completed at 2026-02-27 11:55:42+00:00 https://autobuilder.yoctoproject.org/valkyrie/#/builders/85/builds/1012/steps/18/logs/stdio check-layer-nightly fedora43-vk-2 master completed at 2026-02-27 11:55:42+00:00 https://autobuilder.yoctoproject.org/valkyrie/#/builders/85/builds/1012/steps/20/logs/stdio check-layer-nightly fedora43-vk-2 master completed at 2026-02-27 11:55:42+00:00 https://autobuilder.yoctoproject.org/valkyrie/#/builders/85/builds/1012/steps/24/logs/stdio check-layer-nightly fedora43-vk-2 master completed at 2026-02-27 11:55:42+00:00 https://autobuilder.yoctoproject.org/valkyrie/#/builders/85/builds/1012/steps/26/logs/stdio check-layer-nightly fedora43-vk-2 master completed at 2026-02-28 00:15:14+00:00 https://autobuilder.yoctoproject.org/valkyrie/#/builders/85/builds/1013/steps/12/logs/stdio check-layer-nightly fedora43-vk-2 master completed at 2026-02-28 00:15:14+00:00 https://autobuilder.yoctoproject.org/valkyrie/#/builders/85/builds/1013/steps/14/logs/stdio check-layer-nightly fedora43-vk-2 master completed at 2026-02-28 00:15:14+00:00 https://autobuilder.yoctoproject.org/valkyrie/#/builders/85/builds/1013/steps/16/logs/stdio check-layer-nightly fedora43-vk-2 master completed at 2026-02-28 00:15:14+00:00 https://autobuilder.yoctoproject.org/valkyrie/#/builders/85/builds/1013/steps/18/logs/stdio check-layer-nightly fedora43-vk-2 master completed at 2026-02-28 00:15:14+00:00 https://autobuilder.yoctoproject.org/valkyrie/#/builders/85/builds/1013/steps/20/logs/stdio check-layer-nightly fedora43-vk-2 master completed at 2026-02-28 00:15:14+00:00 https://autobuilder.yoctoproject.org/valkyrie/#/builders/85/builds/1013/steps/24/logs/stdio check-layer-nightly fedora43-vk-2 master completed at 2026-02-28 00:15:14+00:00 https://autobuilder.yoctoproject.org/valkyrie/#/builders/85/builds/1013/steps/26/logs/stdio check-layer-nightly fedora43-vk-2 master completed at 2026-02-28 00:15:14+00:00 https://autobuilder.yoctoproject.org/valkyrie/#/builders/85/builds/1013/steps/28/logs/stdio check-layer-nightly fedora43-vk-2 master completed at 2026-02-28 00:15:14+00:00 https://autobuilder.yoctoproject.org/valkyrie/#/builders/85/builds/1013/steps/30/logs/stdio check-layer-nightly fedora43-vk-2 master completed at 2026-02-28 00:15:14+00:00 https://autobuilder.yoctoproject.org/valkyrie/#/builders/85/builds/1013/steps/32/logs/stdio check-layer-nightly fedora43-vk-2 master completed at 2026-02-27 11:55:42+00:00 https://autobuilder.yoctoproject.org/valkyrie/#/builders/85/builds/1012/steps/22/logs/stdio check-layer-nightly fedora43-vk-2 master completed at 2026-02-28 00:15:14+00:00 https://autobuilder.yoctoproject.org/valkyrie/#/builders/85/builds/1013/steps/22/logs/stdio 104472 4 tgamblin 2026-03-03 15:38:23 +0000 I've seen this locally on my F43 workstation too, but I haven't pinpointed it yet. It may be that some of the bitbake implementation around multiprocessing can be updated. I'll try to look soon. 104523 5 tgamblin 2026-03-05 15:42:28 +0000 *** Bug 16187 has been marked as a duplicate of this bug. *** 104541 6 tgamblin 2026-03-05 16:42:50 +0000 Fixed in: https://git.openembedded.org/bitbake/commit/?id=35866d55908009df429870b28cda0d2266074b48 104542 7 tgamblin 2026-03-05 16:43:11 +0000 See previous comment, fixed here: https://git.openembedded.org/bitbake/commit/?id=35866d55908009df429870b28cda0d2266074b48