python:3.8 and python:3.8.6 are broken

[apeschel]

It appears the python install in the python:3.8.6 release was not properly linked against the OS shared libraries. It is still pointing at libffi6, but the OS has libffi7 installed. This causes all kinds of fun problems with python package installs.

python:3.8 is also broken, because it's a floating tag and was updated to point at the new (broken) python:3.8.6 image.

Details

Error from pip install -e .

ImportError: libffi.so.6: cannot open shared object file: No such file or directory

Installed library

$ dpkg -l | grep libffi
ii  libffi-dev:amd64                    3.3-4                             amd64        Foreign Function Interface library (development files)
ii  libffi7:amd64                       3.3-4                             amd64        Foreign Function Interface library runtime

[apeschel]

This appears to actually be an issue with .python-version -- I'll open up a new issue.