gcc/testsuite/gfortran.dg/read_eof_3.f90

   1 ! { dg-do run { target fd_truncate } }
   2 ! PR25835 Check that reading from a file that is at end-of-file does not
   3 ! segfault or give error.  Test case derived from example in PR from Dale Ranta.
   4 ! Contributed by Jerry DeLisle  <jvdelisle@gcc.gnu.org>
   5        integer data(5000)
   6        data=-256
   7        open(unit=11,status='scratch', form='unformatted')
   8        write(11)data
   9        write(11)data
  10        read(11,end=        1000 )data
  11        STOP 1
  12  1000  continue
  13        backspace 11
  14        rewind 11
  15        write(11)data
  16        read(11,end=        1001 )data
  17        STOP 2
  18  1001  continue
  19        data = 0
  20        backspace 11
  21        rewind 11
  22        read(11,end=        1002 )data
  23        if (.not. all(data == -256)) STOP 3
  24  1002  continue
  25        read(11,end=        1003 )data
  26        STOP 4
  27  1003  continue
  28        close(11)
  29        end
  30
  31