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! { dg-do compile }

! { dg-options "-std=gnu" }

!

! Test of fix (patch unknown) for pr19181 and pr21300. This test is based

! on the example given in 21300.  Note that this can be executed.

!

! Contributed by Paul Thomas  

!

  TYPE ast_obs

    real, DIMENSION(:), POINTER :: geopos

  END TYPE ast_obs

  TYPE(ast_obs), PARAMETER    :: undefined_ast_obs = AST_OBS(NULL())

  type(ast_obs)               :: my_ast_obs

  real, target, dimension(10) :: rt

  my_ast_obs%geopos => rt

  if (.not.associated (my_ast_obs%geopos)) call abort ()

  call get_null_ast_obs (my_ast_obs)

  if (associated (my_ast_obs%geopos)) call abort ()

CONTAINS

  SUBROUTINE get_null_ast_obs (obs1)

    TYPE(ast_obs)  :: obs1

    obs1 = undefined_ast_obs

    RETURN

  END SUBROUTINE get_null_ast_obs

END