}

  public void testNonCancellationPropagating_failure() throws Exception {
    SettableFuture<Foo> input = SettableFuture.create();
    ListenableFuture<Foo> wrapper = nonCancellationPropagating(input);
    Throwable failure = new Throwable("thrown");

    assertFalse(wrapper.isDone());
    input.setException(failure);
    try {
      getDone(wrapper);
      fail();

  }

  public void testNonCancellationPropagating_failure() throws Exception {
    SettableFuture<Foo> input = SettableFuture.create();
    ListenableFuture<Foo> wrapper = nonCancellationPropagating(input);
    Throwable failure = new Throwable("thrown");

    assertFalse(wrapper.isDone());
    input.setException(failure);
    try {
      getDone(wrapper);
      fail();

     * <p>If the combiningCallable throws an {@code ExecutionException}, the cause of the thrown
     * {@code ExecutionException} will be extracted and used as the failure of the derived step.
     *
     * <p>If the combiningCallable throws any other exception, it will be used as the failure of the
     * derived step.
     *
     * <p>If an exception is thrown after the combiningCallable creates a {@code ClosingFuture},

    boolean nullsPresent = false;
    for (Entry<K, V> entry : result.entrySet()) {
      K key = entry.getKey();
      V value = entry.getValue();
      if (key == null || value == null) {
        // delay failure until non-null entries are stored
        nullsPresent = true;
      } else {
        put(key, value);
      }
    }

    if (nullsPresent) {

   *   Iterator<Long> it = set.iterator(); // Must be in synchronized block
   *   while (it.hasNext()) {
   *     foo(it.next());
   *   }
   * }
   * }</pre>
   *
   * <p>Failure to follow this advice may result in non-deterministic behavior.
   *
   * <p>The returned bimap will be serializable if the specified bimap is serializable.
   *

    boolean nullsPresent = false;
    for (Entry<K, V> entry : result.entrySet()) {
      K key = entry.getKey();
      V value = entry.getValue();
      if (key == null || value == null) {
        // delay failure until non-null entries are stored
        nullsPresent = true;
      } else {
        put(key, value);
      }
    }

    if (nullsPresent) {