gcc/testsuite/gfortran.dg/overwrite_1.f

   1 ! { dg-do run { target fd_truncate } }
   2 ! PR 19872 - closed and re-opened file not overwriten
   3       implicit none
   4       integer i(4)
   5       data i / 4 * 0 /
   6       open(1,form='FORMATTED',status='UNKNOWN')
   7       write(1,'("1 2 3 4 5 6 7 8 9")')
   8       close(1)
   9       open(1,form='FORMATTED')
  10       write(1,'("9 8 7 6")')
  11       close(1)
  12       open(1,form='FORMATTED')
  13       read(1,*)i
  14       if(i(1).ne.9.and.i(2).ne.8.and.i(3).ne.7.and.i(4).ne.9)STOP 1
  15       read(1,*,end=200)i
  16 ! should only be able to read one line from the file
  17       STOP 2
  18  200  continue
  19       close(1,STATUS='DELETE')
  20       end