Add reproducer for bug24326.

testsuite/gna/bug24326/repro1.vhdl

@@ -0,0 +1,7 @@
+entity repro1 is
+end;
+
+architecture behav of repro1 is
+  constant c : natural := 5 % 4;
+begin
+end;

testsuite/gna/bug24326/tb_thingy7.vhdl

@@ -0,0 +1,27 @@
+entity tb_thingy is
+end tb_thingy;
+
+architecture tb of tb_thingy is
+	component thingy is
+		generic (
+			a_a : integer
+		);
+		port (
+			x_x : in bit;
+			y_y : out bit
+		);
+	end component;
+	signal stimuli : bit;
+	signal response : bit;
+begin
+
+	dut : thingy
+	generic map (
+		a_a => 42
+	)
+	port map (
+		x%x => stimuli, -- <==
+		y_y => response
+	);
+
+end tb;

testsuite/gna/bug24326/tb_thingy9.vhdl

@@ -0,0 +1,27 @@
+entity tb_thingy is
+end tb_thingy;
+
+architecture tb of tb_thingy is
+	component thingy is
+		generic (
+			a_a : integer
+		);
+		port (
+			x%x : in bit; -- <==
+			y_y : out bit
+		);
+	end component;
+	signal stimuli : bit;
+	signal response : bit;
+begin
+
+	dut : thingy
+	generic map (
+		a_a => 42
+	)
+	port map (
+		x_x => stimuli,
+		y_y => response
+	);
+
+end tb;

testsuite/gna/bug24326/testsuite.sh

@@ -0,0 +1,11 @@
+#! /bin/sh
+
+. ../../testenv.sh
+
+analyze_failure tb_thingy7.vhdl
+analyze_failure tb_thingy9.vhdl
+analyze_failure repro1.vhdl
+
+clean
+
+echo "Test successful"