Discussion related to cado-nfs

[Pierrick Gaudry <pierrick.gaudry@loria.fr>]

Hi Robert,

I've pushed a fix (commit e140378940c). Can you give it a try ?

Regards,
Pierrick

On Thu, Aug 05, 2021 at 02:01:18PM +0100, Robert Balfour wrote:
> Dear Paul et al,
> 
> Any progress on finding the source of this bug?
> 
> Best regards,
> Robert
> 
> On Mon, Jul 26, 2021 at 3:32 PM Paul Zimmermann <Paul.Zimmermann@inria.fr>
> wrote:
> 
> >        Hi,
> >
> > I am able to reproduce the issue. It seems to happen since the following
> > commit:
> >
> > commit c3079ff3ce67dd801915dbd335b210e8570bea68
> > Author: Emmanuel Thomé <Emmanuel.Thome@inria.fr>
> > Date:   Sat Apr 3 15:58:22 2021 +0200
> >
> >     fopen_maybe_compressed: always use a temp file when writing
> >
> > Emmanuel, do you have any clue?
> >
> > Paul
> >
> > > From: Robert Balfour <rhb11931@gmail.com>
> > > Date: Mon, 26 Jul 2021 03:06:11 +0100
> > >
> > >
> > > [1:multipart/alternative Hide]
> > >
> > >
> > > [1/1:text/plain Show]
> > >
> > >
> > > [1/2:text/html Hide Save:noname (3kB)]
> > >
> > > Dear all,
> > >
> > > In recent revisions of CADO (revision 4ef6307d and the latest revision)
> > I am
> > > seeing a bug, on at least some numbers, when dup1 tries to process more
> > than
> > > 2^26 = 67108864 relations. dup1.stdout.1 ends abruptly with
> > >
> > > # Read 67108864 relations in 135.7s -- 62.5 MB/s -- 494715.5 rels/s
> > >
> > > while dup1.stderr.1 ends with the following:
> > >
> > > code BUG() : condition rc == 0 failed in split_iter_open_next_file at
> > > /store/charybdis/cado_4ef6307d/cado-nfs/filter/dup1.c:111 -- Abort
> > >
> > > I tried altering the contents of dup1.filelist.1 and found that the bug
> > > appears precisely when the files contain more than 2^26 relations. So
> > that
> > > you can attempt to reproduce this, I have attached a parameter file that
> > > produces the bug when run with the 149-digit number
> > >
> > > N =
> > >
> > 30451074702779672217829979074588808155199316436755065947683534426904549869449262327316787277317820182752090699957549708141192736670950500076802512839
> > >
> > >
> > > I have also heard from another user who has experienced the same bug 
> > > with
> > > revision 90dd8db3.
> > >
> > > Best regards,
> > > Robert Balfour
> > >
> > > [2:application/octet-stream Show Save:c150.params (2kB)]
> > >
> >