public Object computeNext() {
            return new Object();
          }
        };
    WeakReference<Object> ref = doNextAndGetWeakReference(itr);
    GcFinalization.awaitClear(ref);
  }

  @GwtIncompatible // weak references
  private WeakReference<Object> doNextAndGetWeakReference(Iterator<Object> itr) {
    return new WeakReference<>(itr.next());
  }

  public void testReentrantHasNext() {

          public Object computeNext() {
            return new Object();
          }
        };
    WeakReference<Object> ref = doNextAndGetWeakReference(itr);
    GcFinalization.awaitClear(ref);
  }

  @GwtIncompatible // weak references
  private WeakReference<Object> doNextAndGetWeakReference(Iterator<Object> itr) {
    return new WeakReference<>(itr.next());
  }

  public void testReentrantHasNext() {

          public Object computeNext() {
            return new Object();
          }
        };
    WeakReference<Object> ref = doNextAndGetWeakReference(itr);
    GcFinalization.awaitClear(ref);
  }

  @GwtIncompatible // weak references
  private WeakReference<Object> doNextAndGetWeakReference(Iterator<Object> itr) {
    return new WeakReference<>(itr.next());
  }

          public Object computeNext() {
            return new Object();
          }
        };
    WeakReference<Object> ref = doNextAndGetWeakReference(itr);
    GcFinalization.awaitClear(ref);
  }

  @GwtIncompatible // weak references
  private WeakReference<Object> doNextAndGetWeakReference(Iterator<Object> itr) {
    return new WeakReference<>(itr.next());
  }