Function invocations working, stack unwinding correctly

tests/file.stlg

@@ -2,8 +2,12 @@ fn test(a, b, c) {
     
 };
 
-fn test2(x, y, z) {
+fn test2() {
     test(1, 2, 3);
 };
 
-test2(1, 2, 3);
+fn test3() {
+    test2();
+};
+
+test3();