gcc/testsuite/gfortran.fortran-torture/execute/contained.f90

program contained
   implicit none
   integer i

   i = 0;
   call testproc (40)
   if (i .ne. 42) STOP 1
contains
   subroutine testproc (p)
      implicit none
      integer p

      if (p .ne. 40) STOP 2
      i = p + 2
   end subroutine
end program