Andrew Svetlov added the comment: The problem is: threading.Lock raises ThreadingError (which is subclass of RuntimeError for 3.3 but not for 3.2), but threading.Condition raises RuntimeError for the same reason. RLock behavior is even worse: it raises ThreadingError if C accelerator is available in _thread and RuntimeError otherwise. I think RuntimeError should be replaced by ThreadingError for _RLock and Condition implementations as well as docs need to be updated. Also I think this patch should be applied to 3.4 only, it is enchacement, not bugfix. About fixing docs for 2.7-3.3: I see nothing wrong if current inconsistency will be documented, perhaps as *warning* or *note* block. ---------- components: +Library (Lib) nosy: +asvetlov type: -> enhancement _______________________________________ Python tracker <report@bugs.python.org> <http://bugs.python.org/issue15829> _______________________________________