[petsc-users] check for NULL pointer in VecCreateGhost

[Mohammad Mirzadeh]

Sure, Jed. My bad. Here's the whole message when the code is run in
_serial_:

[0]PETSC ERROR: --------------------- Error Message
------------------------------------
[0]PETSC ERROR: Invalid pointer!
[0]PETSC ERROR: Null Pointer: Parameter # 3!
[0]PETSC ERROR:
------------------------------------------------------------------------
[0]PETSC ERROR: Petsc Release Version 3.2.0, Patch 6, Wed Jan 11 09:28:45
CST 2012
[0]PETSC ERROR: See docs/changes/index.html for recent updates.
[0]PETSC ERROR: See docs/faq.html for hints about trouble shooting.
[0]PETSC ERROR: See docs/index.html for manual pages.
[0]PETSC ERROR:
------------------------------------------------------------------------
[0]PETSC ERROR: ./petsc on a arch-linu named mohammad-laptop by mohammad
Mon Feb 20 15:52:25 2012
[0]PETSC ERROR: Libraries linked from
/home/mohammad/soft/petsc-3.2-p6/arch-linux2-cxx-debug/lib
[0]PETSC ERROR: Configure run at Thu Feb 16 02:16:40 2012
[0]PETSC ERROR: Configure options --with-cc=gcc --with-cxx=g++
--with-fc=gfortran --with-clanguage=cxx --download-f-blas-lapack=1
--download-mpich=1 --download-hypre=1 --download-ml=1
--with-parmetis-include=/home/mohammad/soft/parmetis/include
--with-parmetis-lib="-L/home/mohammad/soft/parmetis/lib -lparmetis -lmetis"
--download-superlu_dist=1
[0]PETSC ERROR:
------------------------------------------------------------------------
[0]PETSC ERROR: AOApplicationToPetsc() line 249 in
/home/mohammad/soft/petsc-3.2-p6/src/dm/ao/interface/ao.c
[0]PETSC ERROR: --------------------- Error Message
------------------------------------
[0]PETSC ERROR: Invalid pointer!
[0]PETSC ERROR: Null Pointer: Parameter # 3!
[0]PETSC ERROR:
------------------------------------------------------------------------
[0]PETSC ERROR: Petsc Release Version 3.2.0, Patch 6, Wed Jan 11 09:28:45
CST 2012
[0]PETSC ERROR: See docs/changes/index.html for recent updates.
[0]PETSC ERROR: See docs/faq.html for hints about trouble shooting.
[0]PETSC ERROR: See docs/index.html for manual pages.
[0]PETSC ERROR:
------------------------------------------------------------------------
[0]PETSC ERROR: ./petsc on a arch-linu named mohammad-laptop by mohammad
Mon Feb 20 15:52:25 2012
[0]PETSC ERROR: Libraries linked from
/home/mohammad/soft/petsc-3.2-p6/arch-linux2-cxx-debug/lib
[0]PETSC ERROR: Configure run at Thu Feb 16 02:16:40 2012
[0]PETSC ERROR: Configure options --with-cc=gcc --with-cxx=g++
--with-fc=gfortran --with-clanguage=cxx --download-f-blas-lapack=1
--download-mpich=1 --download-hypre=1 --download-ml=1
--with-parmetis-include=/home/mohammad/soft/parmetis/include
--with-parmetis-lib="-L/home/mohammad/soft/parmetis/lib -lparmetis -lmetis"
--download-superlu_dist=1
[0]PETSC ERROR:
------------------------------------------------------------------------
[0]PETSC ERROR: AOPetscToApplication() line 210 in
/home/mohammad/soft/petsc-3.2-p6/src/dm/ao/interface/ao.c


It seems to complain about the 3rd parameter of AOApplicationToPetsc()
and AOPetscToApplication(). VecCreateGhost, on the other hand, is fine.

On Mon, Feb 20, 2012 at 3:47 PM, Jed Brown <jedbrown at mcs.anl.gov> wrote:

> On Mon, Feb 20, 2012 at 17:25, Mohammad Mirzadeh <mirzadeh at gmail.com>wrote:
>
>> Hi,
>>
>> Is there an internal check to see if the 'ghost' pointer in
>> VecCreateGhost() is NULL ? This can happen, for example, if the code is run
>> in serial and the there are no ghost points (hence n_ghost = 0 and ghost =
>> NULL(implementation dependent of course) ). AOXXXXToYYYY functions seem to
>> crash if the corresponding pointer is NULL.
>>
>
> Always send the whole error message.
>
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