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library ieee;
use ieee.std_logic_1164.all;
entity repro is
generic (w : integer := 8);
port (a, b : std_logic_vector (w - 1 downto 0);
res : out std_logic_vector (w - 1 downto 0));
end repro;
architecture behav of repro is
begin
process
begin
report "w = " & natural'image(w);
if w <= 0 then
assert false
report "w value is <= 0"
severity error;
end if;
if w > 128 then
assert false
report "w value is large"
severity note;
end if;
wait;
end process;
res <= a or b;
end behav;
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