[issue43498] "dictionary changed size during iteration" error in _ExecutorManagerThread

[Thomas Petazzoni]

Thomas Petazzoni <thomas.petazzoni at free-electrons.com> added the comment:

I can confirm we are seeing the same issue when building Python 3.9 in the context of Buildroot. See http://autobuild.buildroot.net/results/ae6/ae6c4ab292589a4e4442dfb0a1286349a9bf4d29/build-end.log for an example build result. This happens since we have added 48-cores (96 threads) build machines to our build farm, which dramatically increased the build parallelism.

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nosy: +thomas-petazzoni

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<https://bugs.python.org/issue43498>
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