dolfin team mailing list archive

[Anders Logg <logg@xxxxxxxxx>]

On Mon, Dec 29, 2008 at 11:28:07PM +0100, Anders Logg wrote:
> 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...

ok, this should be fixed now. It was a bug in the interpolation
between function spaces which lead to us writing out of memory.

See if it works. I expect (hope) the buildbots to go green in a few
minutes.

-- 
Anders

Attachment: signature.asc
Description: Digital signature