Glenn Langford added the comment: There is a subtlety in the as_completed() code which explains a lot - note that "finished" starts off as a set in the _AcquireFutures block. So if a Future f has already completed, as_completed( [f,f] ) will only yield f once, because f appears once in the finished set.
Later on when waiter events are processed, "finished" turns into a list because of the line: finished = waiter.finished_futures So any duplicates in that list will cause problems in pending.remove(Future). ---------- _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue20367> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
