Here's a potentially related issue – apparently Python 3.6
on a CentOS 7 kernel (which would be an issue when running Fedora in
Docker on an EL7 host, or when we try to get py3.6 in EPEL).
Harris, could you try to reproduce this?
It is not just about python3.6 but I can also see something similar with old
kernel and python35 in latest rawhide userspace