I'm not really sure how to understand this failure and what is the root cause here. First we have: 75 2025-08-17 01:29:52,082 - oe-selftest - INFO - testtools.testresult.real._StringException: Traceback (most recent call last): 76 File "/srv/pokybuild/yocto-worker/qemuarm64-tc/build/meta/lib/oeqa/core/case.py", line 40, in _oeSetUpClass 77 clss.setUpClassMethod() 78 File "/srv/pokybuild/yocto-worker/qemuarm64-tc/build/meta/lib/oeqa/selftest/cases/meta_ide.py", line 23, in setUpClass 79 bb_vars = get_bb_vars(['MACHINE_ARCH', 'TARGET_VENDOR', 'TARGET_OS', 'DEPLOY_DIR_IMAGE', 'COREBASE']) 80 File "/srv/pokybuild/yocto-worker/qemuarm64-tc/build/meta/lib/oeqa/utils/commands.py", line 250, in get_bb_vars 81 bbenv = get_bb_env(target, postconfig=postconfig) 82 File "/srv/pokybuild/yocto-worker/qemuarm64-tc/build/meta/lib/oeqa/utils/commands.py", line 246, in get_bb_env 83 return bitbake("-e", postconfig=postconfig).output 84 File "/srv/pokybuild/yocto-worker/qemuarm64-tc/build/meta/lib/oeqa/utils/commands.py", line 236, in bitbake 85 return runCmd(cmd, ignore_status, timeout, output_log=output_log, **options) 86 File "/srv/pokybuild/yocto-worker/qemuarm64-tc/build/meta/lib/oeqa/utils/commands.py", line 214, in runCmd 87 raise AssertionError("Command '%s' returned non-zero exit status %d:\n%s" % (command, result.status, exc_output)) 88 AssertionError: Command 'bitbake -e' returned non-zero exit status 1: 89 NOTE: Reconnecting to bitbake server... 90 ERROR: Unable to parse <frozen importlib._bootstrap> 91 Traceback (most recent call last): 92 File "<frozen importlib._bootstrap>", line 1024, in _find_and_load 93 File "<frozen importlib._bootstrap>", line 171, in __enter__ 94 File "<frozen importlib._bootstrap>", line 123, in acquire 95 KeyError: 140462603003456 But we also have this, later in the log: 105 Exception in thread Thread-13 (_run_test): 106 Traceback (most recent call last): 107 File "/srv/pokybuild/yocto-worker/qemuarm64-tc/build/meta/lib/oeqa/core/utils/concurrencytest.py", line 234, in _run_test 108 testserver.run(process_result) 109 File "/usr/lib/python3/dist-packages/subunit/__init__.py", line 1197, in run 110 protocol.lineReceived(line) 111 File "/usr/lib/python3/dist-packages/subunit/__init__.py", line 567, in lineReceived 112 self._state.lineReceived(line) 113 File "/usr/lib/python3/dist-packages/subunit/__init__.py", line 404, in lineReceived 114 self.details_parser.lineReceived(line) 115 File "/usr/lib/python3/dist-packages/subunit/details.py", line 42, in lineReceived 116 self._state.endDetails() 117 File "/usr/lib/python3/dist-packages/subunit/__init__.py", line 400, in endDetails 118 self.parser.client.stopTest(self.parser._current_test) 119 File "/usr/lib/python3/dist-packages/testtools/testresult/real.py", line 1537, in stopTest 120 return self.decorated.stopTest(test) 121 File "/usr/lib/python3/dist-packages/testtools/testresult/real.py", line 232, in stopTest 122 super().stopTest(test) 123 File "/usr/lib/python3.10/unittest/result.py", line 80, in stopTest 124 self._restoreStdout() 125 File "/usr/lib/python3.10/unittest/result.py", line 99, in _restoreStdout 126 self._stdout_buffer.seek(0) 127 AttributeError: 'NoneType' object has no attribute 'seek'
qemuarm64-tc ubuntu2204-vk-1 master completed at 2025-08-17 11:34:38+00:00 https://autobuilder.yoctoproject.org/valkyrie/#/builders/5/builds/2140/steps/12/logs/stdio
Richard thinks that this is a python bug in ubu-22.04 that has been fixed in newer versions of python. Monitor for now, The main error is the KeyError
Has't happen. Might be fixed by weekly builder distro updates.
This was seen again in https://bugzilla.yoctoproject.org/show_bug.cgi?id=16296 (which is now closed as a duplicate of this bug).
*** Bug 16296 has been marked as a duplicate of this bug. ***
oe-selftest-debian debian11-vk-1 scarthgap completed at 2026-06-30 18:59:51+00:00 https://autobuilder.yoctoproject.org/valkyrie/?#/builders/35/builds/4176 $ ssh debian11-vk-1.yocto.io python3 --version Python 3.9.2 I think the upstream bug is "importlib lock race issue in deadlock handling code" · Issue #91351 · python/cpython https://github.com/python/cpython/issues/91351 => Linked PR: gh-91351: Fix some bugs in importlib handling of re-entrant imports by exarkun · Pull Request #94504 · python/cpython https://github.com/python/cpython/pull/94504 => Merge commit: gh-91351: Fix some bugs in importlib handling of re-entrant imports (… · python/cpython@3325f05 https://github.com/python/cpython/commit/3325f054e33b318aa56b74472f76a56b8afc0510 => in python >= 3.12 Note: I've created #16335 "Create more fine-grained buildtools", with the idea of creating a buildtool-python3 to install a fixed python where host python3 has this bug.
Looking through https://errors.yoctoproject.org/Errors/Search/?query=frozen+importlib._bootstrap, I found others instances: oe-selftest-fedora stream9-vk-1 scarthgap completed at 2026-06-24 13:17:33+00:00 https://autobuilder.yoctoproject.org/valkyrie/?#/builders/48/builds/3965/steps/15/logs/stdio oe-selftest-debian ubuntu2204-vk-1 scarthgap completed at 2026-04-07 00:36:39+00:00 https://autobuilder.yoctoproject.org/valkyrie/#/builders/35/builds/3612/steps/15/logs/stdio oe-selftest-debian debian11-vk-1 whinlatter completed at 2026-03-29 11:53:50+00:00 https://autobuilder.yoctoproject.org/valkyrie/#/builders/35/builds/3545/steps/15/logs/stdio Note: the link to this bug is not easy to notice because the reported error appears later and is not always the same.