gcc/testsuite/gfortran.dg/backspace_4.f

   1 ! { dg-do run }
   2 ! PR25598 Error on repeated backspaces.
   3 ! Derived from example given in PR by Dale Ranta
   4 ! Contributed by Jerry DeLisle  <jvdelisle@gcc.gnu.org>
   5        integer data
   6        data=-1
   7        open(unit=11,status='scratch',form='unformatted')
   8        write(11)data
   9        read(11,end=        1000 )data
  10        STOP 1
  11  1000  continue
  12        backspace 11
  13        backspace 11
  14        read(11,end=        1001 )data
  15  1001  continue
  16        if (data.ne.-1) STOP 1
  17        close(11)
  18        end