Re: Can arithmetic evaluation trap more than just division by zero?

[Roman Rakus]

On 04/06/2010 02:35 PM, Greg Wooledge wrote:
> On Tue, Apr 06, 2010 at 02:21:05PM +0200, Roman Rakus wrote:
>    
> > > > $((2 ** 63 / -1))
> > > >          
>    
> > I can reproduce it in 4.1.2(1)-release and 4.0.23(1)-release on x86_64
> > GNU/Linux. I didn't try on bash 3.2.
> >      
> cyclops:~$ uname -a; echo $BASH_VERSION
> OpenBSD cyclops.wooledge.org 4.6 GENERIC.MP#81 amd64
> 4.0.24(1)-release
> cyclops:~$ echo $((2 ** 63 / -1))
> Connection to cyclops closed.
> griffon:~$
>
> An amd64-specific bug, then?  (The Linux box I tested on earlier is i386,
> and the HP-UX box is PA-RISC 2.0.)
>
>
>    
I guess the bug is somewhere in glibc and specific for 32 bit systems.
(2^63) is same as (2^63/-1) on 32bit system (tested on ppc32).
RR