static char help[] = "Tests the signal handler.\n";

#include <petscsys.h>

PetscErrorCode CreateError(int n)
{
  if (n) {
    PetscCall(CreateError(n - 1));
  } else {
    volatile PetscReal *x = 0;
    x[0]                  = 100.;
  }
  return PETSC_SUCCESS;
}

int main(int argc, char **argv)
{
  PetscFunctionBeginUser;
  PetscCall(PetscInitialize(&argc, &argv, NULL, help));
  PetscCall(PetscFPrintf(PETSC_COMM_WORLD, stdout, "Demonstrates how PETSc can trap error interrupts\n"));
  PetscCall(PetscFPrintf(PETSC_COMM_WORLD, stdout, "The error below is contrived to test the code!\n"));
  PetscCall(PetscSynchronizedFlush(PETSC_COMM_WORLD, PETSC_STDOUT));
  PetscCall(CreateError(5));
  PetscCall(PetscFinalize());
  return 0;
}

/*TEST

   test:
     args: -error_output_stdout
     filter: grep -E "(Caught signal number 11 SEGV|Caught signal number 4 Illegal)" | wc -l
     TODO:  Does not always produce exactly expected output on all systems for all runs

TEST*/