1 files changed, 54 insertions, 0 deletions
diff --git a/testsuite/gna/issue668/tb.vhdl b/testsuite/gna/issue668/tb.vhdl
new file mode 100644
index 000000000..768038201
--- /dev/null
+++ b/testsuite/gna/issue668/tb.vhdl
@@ -0,0 +1,54 @@
+library ieee;
+use ieee.std_logic_1164.all;
+
+package wishbone_pkg is
+--./wb_demux_tb:internal error: wave.create_type
+	type t_wishbone_master_out is record
+		dat : std_logic_vector;
+	end record;
+	subtype t_wishbone_slave_in is t_wishbone_master_out;
+end wishbone_pkg;
+
+library IEEE;
+use IEEE.STD_LOGIC_1164.ALL;
+
+library work;
+use work.wishbone_pkg.all;
+
+entity wb_demux is
+    Port (
+    	wbs_i	: in t_wishbone_slave_in
+    );
+end wb_demux;
+architecture full_regs of wb_demux is
+begin
+end full_regs;
+
+library ieee;
+use ieee.std_logic_1164.all;
+use ieee.numeric_std.all;
+
+library work;
+use work.wishbone_pkg.all;
+
+entity wb_demux_tb is
+end entity;
+architecture bench of wb_demux_tb is
+	signal wbs_i : t_wishbone_slave_in(
+		dat(32-1 downto 0)
+	);
+begin
+	stimulus : process
+	begin
+		wbs_i.dat <= x"deadbeef";
+		wait for 100 ns;
+		report "pass" severity note;
+		wait;
+	end process;
+
+	dut : entity work.wb_demux
+	port map (
+		wbs_i => wbs_i
+	);
+end architecture;
+