Matt Whitlock <pyt...@mattwhitlock.name> added the comment:
Observed this same failure mode on a Raspberry Pi 1 while running 'make
install' on Python 3.9.5 with 9 concurrent workers.
Exception in thread Thread-1:
Traceback (most recent call last):
File
"/var/tmp/portage/dev-lang/python-3.9.5_p2/image/usr/lib/python3.9/threading.py",
line 954, in _bootstrap_inner
self.run()
File
"/var/tmp/portage/dev-lang/python-3.9.5_p2/image/usr/lib/python3.9/concurrent/futures/process.py",
line 317, in run
result_item, is_broken, cause = self.wait_result_broken_or_wakeup()
File
"/var/tmp/portage/dev-lang/python-3.9.5_p2/image/usr/lib/python3.9/concurrent/futures/process.py",
line 376, in wait_result_broken_or_wakeup
worker_sentinels = [p.sentinel for p in self.processes.values()]
File
"/var/tmp/portage/dev-lang/python-3.9.5_p2/image/usr/lib/python3.9/concurrent/futures/process.py",
line 376, in <listcomp>
worker_sentinels = [p.sentinel for p in self.processes.values()]
RuntimeError: dictionary changed size during iteration
----------
nosy: +whitslack
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Python tracker <rep...@bugs.python.org>
<https://bugs.python.org/issue43498>
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