Re: [gentoo-science] [sage-on-gentoo] Sage-4.5.3 segmentation fault

[Christopher Schwan]

Hi,

On Friday 26 November 2010 12:32:35 Jari_42 wrote:
> Hi,
>
> Just to report that I can reproduce this exact error on my amd64 gentoo
> install with Sage-4.6-r1 and python-2.6.6-r1.

Thanks for reporting! So it looks like this is not problem specific to just one 
computer - if there is anybody else who has the same problem, please write a 
mail to me (you do not need to mail to the list) and attach a file with the 
emerge --info output. I would also like to have emerge --info from Jari - 
hopefully I can find a difference to my system.

Unfortunately, I can not reproduce this error on amd64. This weekend I 
upgraded Sage in a prefixed environment to 4.6 but that went fine. After 
upgrading gcc to 4.5.1 I recompiled my entire prefix (emerge -e @world), but I 
still can not reproduce it.

For the time being, I can only recommend these general instructions:

1. make sure everything is up-to-date
2. make sure revdep-rebuild reports no package

If you have spare cpu time you may recompile world (this sounds really crazy, 
but I am running out of options ;) ) or at least Sage and it dependencies:

    emerge -C sage
    emerge --depclean -a
    emerge sage

This would make sure you do not have unintential old packages installed (this 
may have happened if I had done major changes to ebuilds without upgrading 
their revision number - this "should" not be the case, of course).

Christopher

>
> Thanks,
> Jari
>
> On Thursday 11 November 2010 00:00:20 v_2e@×××.net wrote:
> >   Hello!
> >
> > On Thu, 28 Oct 2010 11:08:28 +1300
> >
> > François Bissey <f.r.bissey@×××××××××.nz> wrote:
> > > thanks for the debugging trace Vladimir.
> > > It looks like the problem is in pynac, it may be a compatibility
> > > problem with python 2.6.6. You have gone in uncharted territories
> > > with this version of python. Christopher knows more about pynac
> > > than me, he may be able to do something about it.
> > >
> > > Thanks for the report.
> > >
> > > Francois
> > >
> >   I just wanted to report that Sage-4.6-r1 shows exactly the same
> >
> > behaviour with python-2.6.6-r1.
> >
> > -----
> >
> >  <v_2e@×××.net>