Mark Dickinson <dicki...@gmail.com> added the comment: Looking at the source, I think I know where this is coming from: one of the terms in the expression for erfc(x) is exp(-x*x). For abs(x) >= 27.284 or so, this underflows to zero.
So the likely cause is that whatever platform you're on is setting errno to ERANGE on underflow to 0; that errno value later gets interpreted as representing an overflow. And for x >= 30.0 a constant expression is used instead, so there's no OverflowError any more. Okay: solved in principle! ---------- _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue8986> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
