[Python-Dev] troubling math bug under IRIX 6.5

[Tim Peters]

[Tommy turns off optimization, and all is well]

>> Do either of these blow up too?
>>
>> >>> 4 * 0.60653065971263342
>> >>> 4.0 * math.exp(-0.5)

> yup.

OK.  Does the first one blow up?  Does the second one blow up?  Or do both
blow up?

Fourth question:  does

>> 4.0 * 0.60653065971263342

blow up?

> ...
> And the next step is... ?

Stop making me pull your teeth <wink>.  I'm trying to narrow down where it's
screwing up.  At worst, then, you can disable optimization only for that
particular file, and create a tiny bug case to send off to SGI World
Headquarters so they fix this someday.  At best, perhaps a tiny bit of code
rearrangement will unstick your compiler (I'm good at guessing what might
work in that respect, but need to narrow it down to a single function within
Python first), and I can check that in for 2.1.