[petsc-users] KSPSolve() passes in the dbg mode, but failed in opt mode

[Xujun Zhao]

Hi all,

I am trying to solve my problem with a direct solver superLU_dist.
But the KSPSolve failed in the "opt" mode. I shifted to the "dbg" version
and wanted to see what error info I can get from the PETSc. Surprisingly,
it passed the solve and didn't output any errors in the "dbg" version. Does
anyone have the similar experience? and what type of potential bugs it may
have?


--->test in StokesSolver::solve(): Start the KSP solve...

[0]PETSC ERROR:
------------------------------------------------------------------------

[0]PETSC ERROR: Caught signal number 11 SEGV: Segmentation Violation,
probably memory access out of range

[0]PETSC ERROR: Try option -start_in_debugger or -on_error_attach_debugger

[0]PETSC ERROR: or see
http://www.mcs.anl.gov/petsc/documentation/faq.html#valgrind

[0]PETSC ERROR: or try http://valgrind.org on GNU/linux and Apple Mac OS X
to find memory corruption errors

[0]PETSC ERROR: configure using --with-debugging=yes, recompile, link, and
run

[0]PETSC ERROR: to get more information on the crash.

[0]PETSC ERROR: --------------------- Error Message
--------------------------------------------------------------

[0]PETSC ERROR: Signal received

[0]PETSC ERROR: See http://www.mcs.anl.gov/petsc/documentation/faq.html for
trouble shooting.

[0]PETSC ERROR: Petsc Release Version 3.7.2, unknown

[0]PETSC ERROR: ./example-dbg on a arch-darwin-c-opt named
mcswl091.mcs.anl.gov by xzhao Mon Jul 25 11:10:12 2016

[0]PETSC ERROR: Configure options --with-cc=gcc --with-cxx=g++
--with-fc=gfortran --download-mpich --download-fblaslapack
--download-scalapack --download-mumps --download-superlu_dist
--download-hypre --download-ml --download-metis --download-parmetis
--download-triangle --download-chaco --with-debugging=0

[0]PETSC ERROR: #1 User provided function() line 0 in  unknown file

application called MPI_Abort(MPI_COMM_WORLD, 59) - process 0
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