This port will be removed on 2020-12-31 if not fixed
This one cannot be "fixed". It's a backport of standard python3 module for pythons < 3.5 (we now only have 2.7 in ports). I'll update it to latest version and set to to expire at December 31.
A commit references this bug:
Date: Tue Oct 20 02:02:40 UTC 2020
New revision: 552787
devel/py-typing: Mark as deprecated, following lang/python27
Python 2 only, backport of Python 3