value = other.value;
        throwable = other.throwable;
        // don't copy the mayInterruptIfRunning bit, for consistency with the server, to ensure that
        // interruptTask() is called if and only if the bit is true and because we cannot infer the
        // interrupt status from non AbstractFuture futures.
        state = other.state;

        notifyAndClearListeners();
        return;
      }

   *   <li>{@link Cancellation} terminal state, {@code cancel} was called.
   *   <li>{@link Failure} terminal state, {@code setException} was called.
   *   <li>{@link SetFuture} intermediate state, {@code setFuture} was called.
   *   <li>{@link #NULL} terminal state, {@code set(null)} was called.
   *   <li>Any other non-null value, terminal state, {@code set} was called with a non-null
   *       argument.
   * </ul>
   */