Add failing test

inputs/failing/copyCounting/methodCall.ts

@@ -0,0 +1,27 @@
+//! test_output(1)
+// Should be: 0
+
+/// <reference path="../../../concept-code/vs.d.ts" />
+
+export default function () {
+  return measure(true) - measure(false);
+}
+
+function measure(call: boolean) {
+  let c = new Counter();
+
+  if (call) {
+    c.inc();
+  }
+
+  return c.cc.count;
+}
+
+class Counter {
+  cc = Debug.makeCopyCounter("cc");
+  value = 0;
+
+  inc() {
+    this.value++;
+  }
+}

inputs/passing/copyCounting/arrayRef.ts

@@ -1,5 +1,7 @@
 //! test_output(0)
 
+/// <reference path="../../../concept-code/vs.d.ts" />
+
 export default function main() {
   return measure(true) - measure(false);
 }

inputs/passing/copyCounting/arraySwap.ts

@@ -1,5 +1,7 @@
 //! test_output(0)
 
+/// <reference path="../../../concept-code/vs.d.ts" />
+
 export default function main() {
   return measure(true) - measure(false);
 }