Nick Coghlan <ncogh...@gmail.com> added the comment: Because you're breaking the semantics of the "raise X from Y" syntax.
That syntax is *just* syntactic sugar for "_exc = X; _exc.__cause__ = Y; raise _exc". Under PEP 409, that remains true. Your patch breaks it. If you want to change the meaning for "raise X from Y", write a new PEP. ---------- _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue14133> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
