Message 386711 - Python tracker

Does https://github.com/python/cpython/pull/1799 solve this issue
for synchronous with?

    with closing(this), closing(that):

If it does, can we backport this fix to python 3.6?

3.6 is used as system python for RHEL/Centos 8, will be used for at
least 5 years or so.