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! { dg-do run }

! Test assignments of nested derived types with character allocatable

! components(PR 20541). Subroutine test_ab6 checks out a bug in a test

! version of gfortran's allocatable arrays.

!

! Contributed by Erik Edelmann  

!            and Paul Thomas  

!

  type :: a

    character(4), allocatable :: ch(:)

  end type a

  type :: b

    type (a), allocatable :: at(:)

  end type b

  type(a) :: x(2)

  type(b) :: y(2), z(2)

  character(4) :: chr1(4) = (/"abcd","efgh","ijkl","mnop"/)

  character(4) :: chr2(4) = (/"qrst","uvwx","yz12","3456"/)

  x(1) = a(chr1)

 ! Check constructor with character array constructors.

  x(2) = a((/"qrst","uvwx","yz12","3456"/))

  y(1) = b((/x(1),x(2)/))

  y(2) = b((/x(2),x(1)/))

  y(2) = y(1)

  if (any((/((y(2)%at(i)%ch(j),j=1,4),i=1,2)/) .ne. &

          (/chr1, chr2/))) call abort ()

  call test_ab6 ()

contains

  subroutine test_ab6 ()

! This subroutine tests the presence of a scalar derived type, intermediate

! in a chain of derived types with allocatable components.

! Contributed by Salvatore Filippone  

    type b

      type(a)  :: a

    end type b

    type c

      type(b), allocatable :: b(:)

    end type c

    type(c)    :: p

    type(b)   :: bv

    p = c((/b(a((/"Mary","Lamb"/)))/))

    bv = p%b(1)

    if (any ((bv%a%ch(:)) .ne. (/"Mary","Lamb"/))) call abort ()

end subroutine test_ab6

end