tzickel <icebreak@yahoo.com> added the comment: A. It would be nice to add a test that tests this. B. Now that Pool is cleaning up properly, any of it's functions which return another object (like imap's IMapIterator) need to hold a reference to the Pool, so it won't get cleanedup before computing. ---------- _______________________________________ Python tracker <report@bugs.python.org> <https://bugs.python.org/issue34172> _______________________________________