Richard Purdie <[email protected]> added the comment:
This is a production backtrace after I inserted code to traceback if tid was
already in _blocking_on. It is being triggered by a warning about an unclosed
asyncio event loop and confirms my theory about nested imports, in the
production case I'd guess being triggered by gc given the __del__.
File
"/home/pokybuild/yocto-worker/oe-selftest-fedora/build/meta/classes/base.bbclass",
line 26, in oe_import
import oe.data
File "<frozen importlib._bootstrap>", line 1024, in _find_and_load
File "<frozen importlib._bootstrap>", line 171, in __enter__
File
"/home/pokybuild/yocto-worker/oe-selftest-fedora/build/bitbake/lib/bb/cooker.py",
line 168, in acquire
return orig_acquire(self)
File "<frozen importlib._bootstrap>", line 110, in acquire
File "/usr/lib64/python3.10/asyncio/base_events.py", line 685, in __del__
_warn(f"unclosed event loop {self!r}", ResourceWarning, source=self)
File "/usr/lib64/python3.10/warnings.py", line 112, in _showwarnmsg
_showwarnmsg_impl(msg)
File "/usr/lib64/python3.10/warnings.py", line 28, in _showwarnmsg_impl
text = _formatwarnmsg(msg)
File "/usr/lib64/python3.10/warnings.py", line 128, in _formatwarnmsg
return _formatwarnmsg_impl(msg)
File "/usr/lib64/python3.10/warnings.py", line 56, in _formatwarnmsg_impl
import tracemalloc
File "<frozen importlib._bootstrap>", line 1024, in _find_and_load
File "<frozen importlib._bootstrap>", line 171, in __enter__
File
"/home/pokybuild/yocto-worker/oe-selftest-fedora/build/bitbake/lib/bb/cooker.py",
line 167, in acquire
bb.warn("\n".join(traceback.format_stack()))
----------
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<https://bugs.python.org/issue47195>
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