[petsc-users] Memory leak when destroying an IS created using ISConcatenate

[Michael Souza]

There is a memory leak when destroying an IS object created with
ISConcatenate function.

The leak can be reproduced with code below.

Cheers,
Michael Souza
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static char help[] = "Memory leak in ISConcatenate function\n\n";
#include <petscksp.h>
#include "matblock.h"
int main(int argc, char **args) {
   PetscErrorCode ierr;
   IS isa, isb, isc;

   ierr = PetscInitialize(&argc, &args, (char *) 0, help); CHKERRQ(ierr);

   ierr = ISCreateStride(PETSC_COMM_WORLD,2,0,1,&isa); CHKERRQ(ierr);
   ierr = ISCreateStride(PETSC_COMM_WORLD,2,2,1,&isb); CHKERRQ(ierr);

   IS isarray[] = {isa, isb};
   ierr = ISConcatenate(PETSC_COMM_WORLD,2,isarray,&isc); CHKERRQ(ierr);

   ierr = ISDestroy(&isa); CHKERRQ(ierr);
   ierr = ISDestroy(&isb); CHKERRQ(ierr);
   ierr = ISDestroy(&isc); CHKERRQ(ierr);

   ierr = PetscFinalize(); CHKERRQ(ierr);
   PetscFunctionReturn(0);
}
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