See https://copr.fedorainfracloud.org/coprs/g/python/python3.8/package/python-stem/ for actual logs. This report is automated and not very verbose, but feel free to ping me for help.
Upstream bug report: https://trac.torproject.org/projects/tor/ticket/30847
Could you please backport https://github.com/torproject/stem/pull/15 ?
Patch committed to rawhide. Could you test it in Python 3.8? https://koji.fedoraproject.org/koji/taskinfo?taskID=36229465
The build succeeded. Closing this. Thanks for the fix!