Anders Logg wrote: > On Wed, Dec 02, 2009 at 01:53:04PM +0100, Johannes Ring wrote: >> On Wed, Dec 2, 2009 at 1:34 PM, Anders Logg <l...@simula.no> wrote: >>> On Wed, Dec 02, 2009 at 01:20:44PM +0100, Johannes Ring wrote: >>>> On Wed, Dec 2, 2009 at 12:46 PM, Anders Logg <l...@simula.no> wrote: >>>>> On Wed, Dec 02, 2009 at 12:10:22PM +0100, Johannes Ring wrote: >>>>>> On Wed, Dec 2, 2009 at 11:58 AM, Anders Logg <l...@simula.no> wrote: >>>>>>> On Wed, Dec 02, 2009 at 11:24:56AM +0100, Johannes Ring wrote: >>>>>>>> On Wed, Dec 2, 2009 at 11:02 AM, Johannes Ring <joha...@simula.no> >>>>>>>> wrote: >>>>>>>>> On Wed, Dec 2, 2009 at 10:58 AM, Anders Logg <l...@simula.no> wrote: >>>>>>>>>> On Wed, Dec 02, 2009 at 10:24:18AM +0100, Johannes Ring wrote: >>>>>>>>>>> Hi, >>>>>>>>>>> >>>>>>>>>>> Someone pushed the Force Build button on the winxp-mingw32 slave. I >>>>>>>>>>> don't see a good reason for this since the demo.log shows it quite >>>>>>>>>>> clearly why it fails: >>>>>>>>>>> >>>>>>>>>>> http://fenics.org:8080/builders/dolfin-winxp-mingw32/builds/11/steps/dolfin%20check/logs/demo.log >>>>>>>>>>> >>>>>>>>>>> The problem is the same as the hardy-i386 slave reports, that is, >>>>>>>>>>> the >>>>>>>>>>> following two demos exits with a segmentation fault: >>>>>>>>>>> >>>>>>>>>>> demo\pde\stokes\stabilized\cpp >>>>>>>>>>> demo\pde\stokes\taylor-hood\cpp >>>>>>>>>> I can't figure out why these fail. Valgrind does not complain on my >>>>>>>>>> machine. Does anyone have a 32 bit system to test on? >>>>>>>>> Yes, I have my laptop. I will try to do some debugging. >>>>>>>> I got a segfault too. Here is the output from running >>>>>>>> demo\pde\stokes\stabilized\cpp in gdb: >>>>>>>> >>>>>>>> joha...@simula-x61:cpp$ gdb ./demo >>>>>>>> GNU gdb 6.8-debian >>>>>>>> Copyright (C) 2008 Free Software Foundation, Inc. >>>>>>>> License GPLv3+: GNU GPL version 3 or later >>>>>>>> <http://gnu.org/licenses/gpl.html> >>>>>>>> This is free software: you are free to change and redistribute it. >>>>>>>> There is NO WARRANTY, to the extent permitted by law. Type "show >>>>>>>> copying" >>>>>>>> and "show warranty" for details. >>>>>>>> This GDB was configured as "i486-linux-gnu"... >>>>>>>> (gdb) run >>>>>>>> Starting program: >>>>>>>> /home/johannr/src/bzr/dolfin/demo/pde/stokes/stabilized/cpp/demo >>>>>>>> [Thread debugging using libthread_db enabled] >>>>>>>> [New Thread 0xb536a6c0 (LWP 21306)] >>>>>>>> Solving linear variational problem >>>>>>>> Matrix of size 8604 x 8604 has 174636 nonzero entries. >>>>>>>> Applying boundary conditions to linear system. >>>>>>>> Applying boundary conditions to linear system. >>>>>>>> >>>>>>>> Program received signal SIGSEGV, Segmentation fault. >>>>>>>> [Switching to Thread 0xb536a6c0 (LWP 21306)] >>>>>>>> 0xb7c265c8 in dolfin::Data::clear () from >>>>>>>> /home/johannr/src/bzr/dolfin/local/lib/libdolfin.so.0 >>>>>>>> Current language: auto; currently asm >>>>>>>> (gdb) where >>>>>>>> #0 0xb7c265c8 in dolfin::Data::clear () from >>>>>>> The line >>>>>>> >>>>>>> x.resize(0); >>>>>>> >>>>>>> in the function Data::clear() in dolfin/function/Data.cpp looks >>>>>>> suspicious. Could you try replacing that line with >>>>>>> >>>>>>> x.clear(); >>>>>>> >>>>>>> and see if that helps? >>>>>> No, it didn't help. >>>>> ok, can you some other things, like not calling clear() from the >>>>> previous location in the trace. And if that works, then comment out >>>>> the lines in clear() one by one. >>>> When I comment out line 62 in dolfin/function/GenericFunction.cpp, the >>>> stokes/stabilized demo seems to be running "forever" (I killed it >>>> after ten minutes). >>> Strange... >>> >>> Is there some virtual machine or host I could get access to so I can >>> debug it? >> Yes, for instance gogmagog.simula.no or kangchenjunga.simula.no. Or I >> can give you access to the hardy-i386 buildbot slave if you prefer. >> >> Johannes > > I've been spending a few hours on this so for without any luck. It's > difficult to spot what goes wrong. It's one of those cases where it > suddenly works if I print too much debug information... > > I'll keep searching but any suggestions appreciated. This is the last > remaining issue before the release. >
I've had a go in a 32 bit VM. I don't get a seg fault with the Stokes demos but it seems to freeze. Interestingly, the Python Stokes demos seem fine. Garth > -- > Anders > > > ------------------------------------------------------------------------ > > _______________________________________________ > Mailing list: https://launchpad.net/~dolfin > Post to : dolfin@lists.launchpad.net > Unsubscribe : https://launchpad.net/~dolfin > More help : https://help.launchpad.net/ListHelp _______________________________________________ Mailing list: https://launchpad.net/~dolfin Post to : dolfin@lists.launchpad.net Unsubscribe : https://launchpad.net/~dolfin More help : https://help.launchpad.net/ListHelp
