Martin Altmayer added the comment: I don't think this is a mere documentation problem: If a future cannot be cancelled because it is already done, cancel must return False.
As Johannes' example demonstrates, a wrong return value from cancel might lead to a cancelled task being continued as if nothing happened: If Task.cancel receives a false positive from its _fut_waiter, it will not throw a CancelledError into the task (_must_cancel=True), but simply continue the task. ---------- nosy: +MartinAltmayer _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue26923> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
