entity repro1 is
end entity;

architecture A of repro1 is
	-- array with unconstrained array element type
	type    A is array(natural range <>) of bit_vector;

	-- partially constrained array -> constrained outer array (vector)
	subtype P2 is A(15 downto 0)(open);

	signal S2 : P2(open)(7 downto 0);  --  fully constrained.
begin
end architecture;