gcc/testsuite/gfortran.dg/backspace_10.f90

   1 ! { dg-do run }
   2 ! PR33307 I/O read/positioning problem - in BACKSPACE
   3 ! Test case devloped from test in PR by Jerry DeLisle  <jvdelisle@gcc.gnu.org>
   4 program gfcbug69b
   5   ! Modified example program
   6   implicit none
   7   integer, parameter :: iunit = 63
   8   integer            :: istat, k, ios
   9   character(len=20) :: line, message
  10
  11   open (iunit)
  12   write (iunit, '(a)') "! ***Remove this line***"
  13   write (iunit, '(a)') "&FOO        file='foo' /"
  14   write (iunit, '(a)', advance="no") "&BAR        file='bar' /"
  15   close (iunit)
  16 ! Note: Failure occurred only when ACTION="read" was specified
  17   open (iunit, action="read", status="old")
  18
  19   read (iunit,'(a)',iostat=ios) line
  20   if (ios /= 0) STOP 1
  21   read (iunit,'(a)',iostat=ios) line
  22   if (ios /= 0) STOP 2
  23   read (iunit,'(a)',iostat=ios) line
  24   if (ios /= 0) STOP 3
  25   read (iunit,'(a)',iostat=ios) line
  26   if (ios /= 0) backspace (iunit)
  27   rewind (iunit)
  28   read (iunit,'(a)',iostat=ios) line
  29   if (ios /= 0) STOP 4
  30   read (iunit,'(a)',iostat=ios) line
  31   if (ios /= 0) STOP 5
  32   read (iunit,'(a)',iostat=ios) line
  33   if (ios /= 0) STOP 6
  34   read (iunit,'(a)',iostat=ios) line
  35   if (ios /= -1) STOP 7
  36   close (iunit, status="delete")
  37 end program gfcbug69b