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! { dg-do run }
! Test assignments of nested derived types with allocatable components(PR 20541).
!
! Contributed by Erik Edelmann <eedelmann@gcc.gnu.org>
! and Paul Thomas <pault@gcc.gnu.org>
!
type :: a
integer, allocatable :: i(:)
end type a
type :: b
type (a), allocatable :: at(:)
end type b
type(a) :: x(2)
type(b) :: y(2), z(2)
integer i, m(4)
x(1) = a((/1,2,3,4/))
x(2) = a((/1,2,3,4/)+10)
y(1) = b((/x(1),x(2)/))
y(2) = b((/x(2),x(1)/))
y(2) = y(1)
forall (j=1:2,k=1:4, y(1)%at(j)%i(k) .ne. y(2)%at(j)%i(k)) &
y(1)%at(j)%i(k) = 999
if (any ((/((y(1)%at(j)%i(k), k=1,4),j=1,2)/) .eq. 999)) call abort ()
z = y
forall (i=1:2,j=1:2,k=1:4, z(i)%at(j)%i(k) .ne. y(i)%at(j)%i(k)) &
z(i)%at(j)%i(k) = 999
if (any ((/(((z(i)%at(j)%i(k), k=1,4),j=1,2),i=1,2)/) .eq. 999)) call abort ()
end
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