1 files changed, 24 insertions, 0 deletions
diff --git a/testsuite/synth/issue960/ent.vhdl b/testsuite/synth/issue960/ent.vhdl
new file mode 100644
index 000000000..41873645d
--- /dev/null
+++ b/testsuite/synth/issue960/ent.vhdl
@@ -0,0 +1,24 @@
+library ieee;
+use ieee.std_logic_1164.all;
+
+entity ent is
+    port (
+        clk : in std_logic
+    );
+end;
+
+architecture a of ent is
+    procedure inv(signal s : inout std_logic) is
+    begin
+        s <= not s;
+    end procedure;
+
+    signal test : std_logic;
+begin
+    process(clk)
+    begin
+        if rising_edge(clk) then
+            inv(test);
+        end if;
+    end process;
+end;