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! { dg-do run }

! Tests the fix for PR30626, in which the substring reference

! for an internal file would cause an ICE.

!

! Contributed by Francois-Xavier Coudert 

program gfcbug51

  implicit none

  character(len=12) :: cdate(3)      ! yyyymmddhhmm

  type year_t

    integer :: year = 0

  end type year_t

  type(year_t) :: time(3)

  cdate = (/'200612231200', '200712231200', &

            '200812231200'/)

  time = date_to_year (cdate)

  if (any (time%year .ne. (/2006, 2007, 2008/))) call abort ()

  call month_to_date ((/8, 9, 10/), cdate)

  if ( any (cdate .ne. (/'200608231200', '200709231200', &

                         '200810231200'/))) call abort ()

contains

  function date_to_year (d) result (y)

    character(len=12) :: d(3)

    type(year_t) :: y(size (d, 1))

    read (cdate(:)(1:4),'(i4)')  time% year

  end function date_to_year

  subroutine month_to_date (m, d)

    character(len=12) :: d(3)

    integer :: m(:)

    write (cdate(:)(5:6),'(i2.2)')  m

  end subroutine month_to_date

end program gfcbug51