gcc/testsuite/gfortran.dg/interface_assignment_2.f90

! { dg-do run }
! Checks the fix for PR32842, in which the interface assignment
! below caused a segfault.  This testcase is reduced from vst_2.f95
! in the iso_varying_string testsuite, from Lawrie Schonfelder
!
! Contributed by Tobias Burnus <burnus@gcc.gnu.org>
!
module iso_varying_string
  implicit none
  integer, parameter :: GET_BUFFER_LEN = 256
  type varying_string
     character(LEN=1), dimension(:), allocatable :: chars
  end type varying_string
  interface assignment(=)
     module procedure op_assign_VS_CH
  end interface assignment(=)
contains
  elemental subroutine op_assign_VS_CH (var, expr)
    type(varying_string), intent(out) :: var
    character(LEN=*), intent(in)      :: expr
    var = var_str(expr)
  end subroutine op_assign_VS_CH
  elemental function var_str (chr) result (string)
    character(LEN=*), intent(in) :: chr
    type(varying_string)         :: string
    integer                      :: length
    integer                      :: i_char
    length = LEN(chr)
    ALLOCATE(string%chars(length))
    forall(i_char = 1:length)
       string%chars(i_char) = chr(i_char:i_char)
    end forall
  end function var_str
end module iso_varying_string

PROGRAM VST_2
  USE ISO_VARYING_STRING
  IMPLICIT NONE
  CHARACTER(LEN=5)     :: char_arb(2)
  CHARACTER(LEN=1)     :: char_elm(10)
  equivalence (char_arb, char_elm)
  type(VARYING_STRING) :: str_ara(2)
  char_arb(1)= "Hello"
  char_arb(2)= "World"
  str_ara = char_arb
  if (any (str_ara(1)%chars(1:5) .ne. char_elm(1:5))) STOP 1
  if (any (str_ara(2)%chars(1:5) .ne. char_elm(6:10))) STOP 2
END PROGRAM VST_2