}
    }
  }

  /** Unblocks all threads and runs all listeners. */
  private static void complete(AbstractFuture<?> param, boolean callInterruptTask) {
    // Declare a "true" local variable so that the Checker Framework will infer nullness.
    AbstractFuture<?> future = param;

    Listener next = null;
    outer:
    while (true) {
      future.releaseWaiters();
      /*