PARI/GP Bug report logs - #1237
undefined behaviour in pari_init_parser

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From Bill.Allombert@math.u-bordeaux1.fr Sun Sep 18 23:48:00 2011
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Date: Sun, 18 Sep 2011 23:47:54 +0200
From: Bill Allombert <Bill.Allombert@math.u-bordeaux1.fr>
To: Julian Taylor <jtaylor.debian@googlemail.com>
Cc: 1237@pari.math.u-bordeaux.fr
Subject: Re: Bug#1237: undefined behaviour in pari_init_parser
Message-ID: <20110918214754.GM18359@yellowpig>
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On Sun, Sep 18, 2011 at 10:10:34PM +0200, Julian Taylor wrote:
> On 09/13/2011 04:41 PM, Bill Allombert wrote:
> > On Fri, Sep 02, 2011 at 06:57:38PM +0200, Bill Allombert wrote:
> >> On Thu, Sep 01, 2011 at 11:00:43PM +0200, Julian Taylor wrote:
> >>
> >> Well, you can try the attached patch which work around the compiler issue without
> >> breaking the ABI (tested on sparc).
> > 
> > Hello Julian, 
> > I have uploaded a new Debian package that includes this patch and it was built correctly
> > on all platform, as you can see 
> > <https://buildd.debian.org/status/package.php?p=pari>
> > this includes armel and sparc. 
> > Do you still have issues on armel ?
> > 
> > A technical note: it is possible that stack_init is not standard compliant, but it
> > should be possible to rewrite it in a standard compliant according to
> > <http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49330#c8>
> > However gcc-4.6 bug PR49330 is still open so PARI would still be miscompiled.
> > 
> > Cheers,
> > Bill.
> 
> unfortunately it still fails with the same issue in my qemu armel chroot
> on ubuntu oneiric which has pretty much the same gcc version as debian
> (4.6-9ubuntu3).
> I don't understand why.

Can you check with the debugger whether it is not a different instance of the same
issue ? The function pari_init_parser has a similar issue.

Cheers,
Bill.

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