Possible bug (was Re: numpy, overflow, inf, ieee, and rich comparison)

[Huaiyu Zhu]

On Tue, 10 Oct 2000 07:01:40 -0400, Tim Peters <tim_one at email.msn.com> wrote:
>
>Can't answer your question.  It's a platform-dependent crap shoot, and in
>any case is usually entirely due to the libraries you're linking with and
>nothing to do with the compiler.  Do you have any way to tell which
>libraries you're using in the two cases?  Can you still get at them?  If so,
>write a little C program to do the same thing, and see whether exp sets
>errno there.

This is very likely to be a 2.0 bug.  Just to make sure, I have used freshly
downloaded source code of both 1.5.2 and 2.0b2, then

./configure
make
./python

from math import *
exp(-746)

I got 0.0 from 1.5.2 but OverflowError: math range error from 2.0b2. 

The file mathmodule.c has quite some differences between the two versions,
mostly related to the ANSIfication.  I'm not sure where the problem is.

I haven't tried the 2.0c1 yet, as the site is not available.  Can other Unix
users confirm this behavior?


Huaiyu