[petsc-users] error related to nested vector

[Y. Shidi]

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