dolfin team mailing list archive

[Anders Logg <logg@xxxxxxxxx>]

On Mon, Dec 29, 2008 at 02:35:58PM +0100, Johan Hake wrote:
> On Monday 29 December 2008 14:26:56 Anders Logg wrote:
> > On Mon, Dec 29, 2008 at 02:23:55PM +0100, Johan Hake wrote:
> > > On Monday 29 December 2008 14:11:17 Anders Logg wrote:
> > > > This demo works for me, both with and without DOLFIN_NOPLOT.
> > > > I had to run instant-clean to make it work (don't know why).
> > > >
> > > > Try and see if that helps.
> > >
> > > I have done that several times with no luck. I have tried valgrind, with
> > > no directly usefull output (found some MPI memory leaks though) and also
> > > tried gdb, but the segfaults comes from within some python library code
> > > and I cannot find any usefull there.
> > >
> > > I am compiling swig from svn, but I assume that the buildbot is using a
> > > release swig and it also gets the segfault.
> > >
> > > I am running hardy with python version 2.5.2, numpy 1.1.1 from Andrew
> > > Straws repositories and gcc-4.2.4.
> > >
> > > Johan
> >
> > Can you isolate the step that goes wrong in the demo? (Comment out
> > everything and gradually uncomment.)
> 
> If I uncomment
> 
>   PIv = interpolate(v, P1)
> 
> and the related plot command it does not segfaults. A print statement in the 
> end of the script will print, so it does not segfaults in our code, but we 
> could of course be the one to blame. I therefore suspect that it could be 
> some memory that we haven't freed properly.
> 
> Johan

I also get a segmentation fault now, but it only appears the first
time I run the demo after running instant-clean. If I run it again it
works...

-- 
Anders

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