Message 391963 - Python tracker

@serhiy.storchaka I have no idea what's causing the errors I described in https://bugs.python.org/msg391947. I looked at all the changes in apply-to-all.diff and I don't think any of the errors are related. Do you have any thoughts about this problem? Is it even reproducible?

(I'm attaching a diff combining the patch.diff and apply-to-all.diff together in one file.)