!
!  Simple PETSc Program to test setting error handlers from Fortran
!
#include <petsc/finclude/petscsys.h>
module ex1fmodule
  use petscsys
  implicit none
contains
  subroutine GenerateErr(line, ierr)
    PetscErrorCode ierr
    integer line

    call PetscError(PETSC_COMM_SELF, 1, PETSC_ERROR_INITIAL, 'My error message')
  end

  subroutine MyErrHandler(comm, line, fun, file, n, p, mess, ctx, ierr)
    integer line, n, p
    PetscInt ctx
    PetscErrorCode ierr
    MPIU_Comm comm
    character*(*) fun, file, mess

    write (6, *) 'My error handler ', mess
    call flush (6)
  end
end module ex1fmodule

program main
  use petscsys
  use ex1fmodule
  implicit none
  PetscErrorCode ierr

  PetscCallA(PetscInitialize(ierr))
  PetscCallA(PetscPushErrorHandler(PetscTraceBackErrorHandler, PETSC_NULL_INTEGER, ierr))
  PetscCallA(GenerateErr(__LINE__, ierr))
  PetscCallA(PetscPushErrorHandler(MyErrHandler, PETSC_NULL_INTEGER, ierr))
  PetscCallA(GenerateErr(__LINE__, ierr))
  PetscCallA(PetscPushErrorHandler(PetscAbortErrorHandler, PETSC_NULL_INTEGER, ierr))
  PetscCallA(GenerateErr(__LINE__, ierr))
  PetscCallA(PetscFinalize(ierr))
end

!
!     These test fails on some systems randomly due to the Fortran and C output becoming mixed up,
!     using a Fortran flush after the Fortran print* does not resolve the issue
!
!/*TEST
!
!   test:
!     args: -error_output_stdout
!     TODO: cannot fix
!     filter:Error: grep -E "(My error handler|Operating system error: Cannot allocate memory)" | wc -l
!
!TEST*/