gcc/testsuite/gfortran.dg/do_check_3.f90

   1 ! { dg-do run }
   2 ! { dg-options "-fcheck=do" }
   3 ! { dg-shouldfail "DO check" }
   4 !
   5 ! PR fortran/34656
   6 ! Run-time check for modifing loop variables
   7 !
   8 program test
   9   implicit none
  10   real :: i, j, k
  11   j = 10.0
  12   k = 1.0
  13   do i = 1.0, j, k ! { dg-warning "must be integer" }
  14     call modLoopVar(i)
  15   end do
  16 contains
  17   subroutine modLoopVar(x)
  18     real :: x
  19     x = x + 1
  20   end subroutine modLoopVar
  21 end program test
  22 ! { dg-output "Fortran runtime error: Loop variable has been modified" }