[petsc-users] Newbie question: Strange failure when calling PetscIntView from slepc application

[dazza simplythebest]

Dear Stefano,
                      Thanks for your response. I have re-run the command as per your suggestion below,
and I get the full output as attached to this email ( the output was quite long so I thought it
better to attach it).   However, I am wondering whether the following lines of this output,
which occur just when the program fails, may be something to do with the problem ?
       Many thanks,
                              Dan.
.
.
.
 check 01:           10           0           9
 check 02:           10           0           9
                     4                     4                     4
                     4                     4                     4
                     4                     4                     4
                     4
 now for PetscIntView ...
0: 4 4 4 4 4 4 4 4 4 4
==841883== Invalid write of size 4
==841883==    at 0x503E784: petscintview_ (/data/work/slepc/PETSC/petsc-3.14.5/src/sys/error/ftn-custom/zerrf.c:109)
==841883==    by 0x40262C: all_stab_routines_mp_write_rows_to_petsc_matrix_ (/data/work/rotplane/omega_to_zero/stability/test/tmp10/tmp3/tryme.F:17)
==841883==    by 0x402465: MAIN__ (/data/work/rotplane/omega_to_zero/stability/test/tmp10/tmp3/tryme.F:40)
==841883==    by 0x402221: main (in /data/work/rotplane/omega_to_zero/stability/test/tmp10/tmp3/trashy.exe)
==841883==  Address 0x0 is not stack'd, malloc'd or (recently) free'd
==841883==
[0]PETSC ERROR: ------------------------------------------------------------------------[0]PETSC ERROR: Caught signal number 11 SEGV: Segmentation Violation, probably memory access out of range

.
.
.
________________________________
From: Stefano Zampini <stefano.zampini at gmail.com>
Sent: Friday, April 9, 2021 9:17 AM
To: dazza simplythebest <sayosale at hotmail.com>
Cc: petsc-users at mcs.anl.gov <petsc-users at mcs.anl.gov>
Subject: Re: [petsc-users] Newbie question: Strange failure when calling PetscIntView from slepc application

This way you are running mpiexec.hydra under valgrind. You want to run instead

mpiexec.hydra -n 1 valgrind --track-origins=yes --leak-check=full  --fullpath-after= ./trashy.exe

On Apr 9, 2021, at 12:11 PM, dazza simplythebest <sayosale at hotmail.com<mailto:sayosale at hotmail.com>> wrote:

valgrind --track-origins=yes --leak-check=full     mpiexec.hydra -n 1 ./trashy.exe

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