[petsc-users] error related to nested vector

[Matthew Knepley]

It says that memory is being overwritten somewhere. You can track this down
using valgrind,
as it suggests in the error message.

  Thanks,

     Matt

On Tue, Jan 14, 2020 at 5:44 AM Y. Shidi <ys453 at cam.ac.uk> wrote:

> Dear developers,
>
> I have a 2x2 nested matrix and the corresponding nested vector.
> When I running the code with field splitting, it gets the following
> errors:
>
> [0]PETSC ERROR: PetscTrFreeDefault() called from VecRestoreArray_Nest()
> line 678 in /home/ys453/Sources/petsc/src/vec/vec/impls/nest/vecnest.c
> [0]PETSC ERROR: Block at address 0x3f95f60 is corrupted; cannot free;
> may be block not allocated with PetscMalloc()
> [0]PETSC ERROR: --------------------- Error Message
> --------------------------------------------------------------
> [0]PETSC ERROR: Memory corruption:
> http://www.mcs.anl.gov/petsc/documentation/installation.html#valgrind
> [0]PETSC ERROR: Bad location or corrupted memory
> [0]PETSC ERROR: See http://www.mcs.anl.gov/petsc/documentation/faq.html
> for trouble shooting.
> [0]PETSC ERROR: Petsc Release Version 3.9.3, unknown
> [0]PETSC ERROR: 2DPetscSpuriousTest on a arch-linux2-c-debug named
> merlin by ys453 Tue Jan 14 10:36:53 2020
> [0]PETSC ERROR: Configure options --download-scalapack --download-mumps
> --download-parmetis --download-metis --download-ptscotch
> --download-superlu_dist --download-hypre
> [0]PETSC ERROR: #1 PetscTrFreeDefault() line 269 in
> /home/ys453/Sources/petsc/src/sys/memory/mtr.c
> [0]PETSC ERROR: #2 VecRestoreArray_Nest() line 678 in
> /home/ys453/Sources/petsc/src/vec/vec/impls/nest/vecnest.c
> [0]PETSC ERROR: #3 VecRestoreArrayRead() line 1835 in
> /home/ys453/Sources/petsc/src/vec/vec/interface/rvector.c
> [0]PETSC ERROR: #4 VecRestoreArrayPair() line 511 in
> /home/ys453/Sources/petsc/include/petscvec.h
> [0]PETSC ERROR: #5 VecScatterBegin_SSToSS() line 671 in
> /home/ys453/Sources/petsc/src/vec/vscat/impls/vscat.c
> [0]PETSC ERROR: #6 VecScatterBegin() line 1779 in
> /home/ys453/Sources/petsc/src/vec/vscat/impls/vscat.c
> [0]PETSC ERROR: #7 PCApply_FieldSplit() line 1010 in
> /home/ys453/Sources/petsc/src/ksp/pc/impls/fieldsplit/fieldsplit.c
> [0]PETSC ERROR: #8 PCApply() line 457 in
> /home/ys453/Sources/petsc/src/ksp/pc/interface/precon.c
> [0]PETSC ERROR: #9 KSP_PCApply() line 276 in
> /home/ys453/Sources/petsc/include/petsc/private/kspimpl.h
> [0]PETSC ERROR: #10 KSPFGMRESCycle() line 166 in
> /home/ys453/Sources/petsc/src/ksp/ksp/impls/gmres/fgmres/fgmres.c
> [0]PETSC ERROR: #11 KSPSolve_FGMRES() line 291 in
> /home/ys453/Sources/petsc/src/ksp/ksp/impls/gmres/fgmres/fgmres.c
> [0]PETSC ERROR: #12 KSPSolve() line 669 in
> /home/ys453/Sources/petsc/src/ksp/ksp/interface/itfunc.c
>
> I am not sure why it happens.
>
> Thank you for your time.
>
> Kind Regards,
> Shidi
>


-- 
What most experimenters take for granted before they begin their
experiments is infinitely more interesting than any results to which their
experiments lead.
-- Norbert Wiener

https://www.cse.buffalo.edu/~knepley/ <http://www.cse.buffalo.edu/~knepley/>
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