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! { dg-do run }

! { dg-options "-fbounds-check" }

! { dg-shouldfail "foo" }

!

! PR 31119

module sub_mod

contains

  elemental subroutine set_optional(i,idef,iopt)

    integer, intent(out)          :: i

    integer, intent(in)           :: idef

    integer, intent(in), optional :: iopt

    if (present(iopt)) then

      i = iopt

    else

      i = idef

    end if

  end subroutine set_optional

  subroutine sub(ivec)

    integer          , intent(in), optional :: ivec(:)

    integer                                 :: ivec_(2)

    call set_optional(ivec_,(/1,2/))

    if (any (ivec_ /= (/1,2/))) call abort

    call set_optional(ivec_,(/1,2/),ivec)

    if (present (ivec)) then

      if (any (ivec_ /= ivec)) call abort

    else

      if (any (ivec_ /= (/1,2/))) call abort

    end if

  end subroutine sub

end module sub_mod

program main

  use sub_mod, only: sub

  call sub()

  call sub((/4,5/))

  call sub((/4/))

end program main

! { dg-output "Fortran runtime error: Array bound mismatch" }

! { dg-final { cleanup-modules "sub_mod" } }