Discussion related to cado-nfs

[eric.jeancolas@free.fr]

Hi,

You got it, it's a RAM failure! My first RAM failure for 40 years of computer 
usage… ! Maybe I have been lucky in the past.
At least, this incident gave the indication that standard implementation of 
cmake is better that just let make download a version that could be not in 
synch with some levels of patches.
Thank you for having made the link between the segfault and a RAM failure. 
This computer ran about 20000 occurrences of cado-nfs without any problem up 
to this RAM failure.
For me, next step: buy a new memory stick…

Best regards
----- Mail original -----
De: "Emmanuel Thomé" <Emmanuel.Thome@inria.fr>
À: "eric jeancolas" <eric.jeancolas@free.fr>
Cc: cado-nfs@inria.fr
Envoyé: Vendredi 18 Novembre 2022 17:23:16
Objet: Re: [cado-nfs] Compil pb with latest patches Ubuntu 22.04 and 22.10

Hi,

> [  1%] Building CXX object utils/CMakeFiles/utils.dir/params.cpp.o
> cc1plus: internal compiler error: Erreur de segmentation

(please avoid localized error messages in reports).

Your compiler segfaults. It should not.

If the failure is reproducible (make VERBOSE=1 ; redo and re-redo the gcc
line ; add verbosity) and occurs deterministically with an identical
stack trace (run compiler substep under gdb), then it can be related to
the fact that the compiler has a bug (ICEs should **never** occur). In
turn, this might be triggered by a code pattern in cado-nfs which _could_
be at fault, for example because it is ill-formed in some way.
Ill-formed programs are much more likely to disturb compilers. (but
params.cpp is nothing super fancy)

However, I would consider the above explanation a tad less likely than
the possibility that you have faulty hardware, most probably RAM. At the
very least I would suggest to try with another machine.

Best,

E.



On Fri, Nov 18, 2022 at 04:40:31PM +0100, eric.jeancolas@free.fr wrote:
> Hi,
> 
> First of all, with sudo apt install cmake, I went further on 22.10. I agree 
> it is better to keep consistant in packages. I didn't know it was possible 
> to install cmake via apt, and for sure, this is a good practice to do so. 
> Anyway, we have to do some sudo apt install with m4, libgmp3-dev, etc. So 
> to add cmake as a requirement is not a problem.
> 
> I went further, but I'm blocked now at this stage :
> [  1%] Building CXX object utils/CMakeFiles/utils.dir/params.cpp.o
> cc1plus: internal compiler error: Erreur de segmentation
> 
> I'll make more tests in the following days. I'll keep you posted.
> 
> Best regards.
> 
> ----- Mail original -----
> De: "Emmanuel Thomé" <Emmanuel.Thome@inria.fr>
> À: cado-nfs@inria.fr
> Envoyé: Jeudi 17 Novembre 2022 18:24:02
> Objet: Re: [cado-nfs] Compil pb with latest patches Ubuntu 22.04 and 22.10
> 
> Hi,
> 
> None of these configurations is expected to cause problems, really.
> 
> I just tested with ubuntu 22.04.1 and 22.10 (the ubuntu:latest and
> ubuntu:rolling containers, more precisely). Compilers version are similar
> to what you report. I did not encounter any problem.
> 
> There is indeed a recent fix that cures a compiler mishap, and which I
> had not yet pushed to master before a few minutes ago (de0d915ea).
> However the triggers for that bug were rather recent clang +
> system-installed libfmt-dev. Nothing like what you seem to have. So I
> doubt that this will solve your problem.
> 
> I do notice one thing: you're relying on this weird feature of cado-nfs
> that downloads and installs cmake. Really, I'd like to get rid of that
> feature, it's a nuisance. It could *maybe* be a cause to your problem.
> 
> IOW: sudo apt-install cmake, and get rid of the cado-nfs cruft that
> cado-nfs has generated for you. You'll probably be much better off with a
> system installed version.
> 
> While you're at it, things like libfmt-dev and libhwloc-dev are also nice
> to have.
> 
> Please tell me if any of the above information helps you find out what is
> going on. If not, I would indeed need further information.
> 
> E.
> 
> On Thu, Nov 17, 2022 at 05:39:45PM +0100, eric.jeancolas@free.fr wrote:
> > Hi,
> > 
> > I upgraded to Ubuntu 22.10, including gcc 12.2.0 and g++ 12.2.0
> > I just uploaded the last development version of cado-nfs, via git clone 
> > https://gitlab.inria.fr/cado-nfs/cado-nfs.git
> > When I enter make, I get several errors and the process stops rather 
> > quickly.
> > The first one is 
> > /tmp/cado-nfs.cmake-build.Sd9HMlmE/cmake-3.4.3/Source/cmLinkedTree.h:42:32:
> >  warning: ‘template<class _Category, class _Tp, class _Distance, class 
> > _Pointer, class _Reference> struct std::iterator’ is deprecated 
> > [-Wdeprecated-declarations]
> > Have you gotten the same problem, or is it an intallation problem with my 
> > upgrade?
> > 
> > When compiling on another CPU 22.04 LTS latest patches, with gcc/g++ 
> > 11.3.0, the process goes further, but it ends with 
> > 6%] Building CXX object 
> > utils/CMakeFiles/utils.dir/embedded/fmt/format.cc.o
> > /home/acces/Documents/cado-nfs/utils/embedded/fmt/format.cc:14:37: error: 
> > redefinition of default argument for ‘class T’
> > and several error messages.
> > 
> > Of course, I'm ready to give more info on request.

-- 
Pour une évaluation indépendante, transparente et rigoureuse !
Je suis à la CE de l'Inria pour y apporter ma contribution.