final ExecutorService closingExecutor = newSingleThreadExecutor();

  final TestCloseable closeable1 = new TestCloseable("closeable1");
  final TestCloseable closeable2 = new TestCloseable("closeable2");
  final TestCloseable closeable3 = new TestCloseable("closeable3");
  final TestCloseable closeable4 = new TestCloseable("closeable4");

  final Waiter waiter = new Waiter();

  final ExecutorService closingExecutor = newSingleThreadExecutor();

  final TestCloseable closeable1 = new TestCloseable("closeable1");
  final TestCloseable closeable2 = new TestCloseable("closeable2");
  final TestCloseable closeable3 = new TestCloseable("closeable3");
  final TestCloseable closeable4 = new TestCloseable("closeable4");

  final Waiter waiter = new Waiter();

      }
    }

    void add(@Nullable AutoCloseable closeable, Executor executor) {
      checkNotNull(executor);
      if (closeable == null) {
        return;
      }
      synchronized (this) {
        if (!closed) {
          put(closeable, executor);
          return;
        }
      }
      closeQuietly(closeable, executor);
    }

    /**

    Throwable throwable = thrown;

    // close closeables in LIFO order
    while (!stack.isEmpty()) {
      Closeable closeable = stack.removeFirst();
      try {
        closeable.close();
      } catch (Throwable e) {
        if (throwable == null) {
          throwable = e;
        } else {
          suppressor.suppress(closeable, throwable, e);
        }
      }
    }

      this.closeable = closeable;
      this.thrown = thrown;
      this.suppressed = suppressed;
    }

    @Override
    public boolean equals(@Nullable Object obj) {
      if (obj instanceof Suppression) {
        Suppression other = (Suppression) obj;
        return closeable.equals(other.closeable)
            && thrown.equals(other.thrown)

@J2ktIncompatible
public class ClosingFutureLeakTest extends TestCase {
  public void testLeak() {
    TestCloseable closeable = new TestCloseable("closeable");
    awaitClear(leakClosingFuture(closeable));
    assertThat(closeable.awaitClosed()).isTrue();
  }

  private WeakReference<ClosingFuture<String>> leakClosingFuture(TestCloseable closeable) {
    ClosingFuture<String> willCloseCloseable =
        ClosingFuture.submit(
            closer -> {

@J2ktIncompatible
public class ClosingFutureLeakTest extends TestCase {
  public void testLeak() {
    TestCloseable closeable = new TestCloseable("closeable");
    awaitClear(leakClosingFuture(closeable));
    assertThat(closeable.awaitClosed()).isTrue();
  }

  private WeakReference<ClosingFuture<String>> leakClosingFuture(TestCloseable closeable) {
    ClosingFuture<String> willCloseCloseable =
        ClosingFuture.submit(
            closer -> {

      this.closeable = closeable;
      this.thrown = thrown;
      this.suppressed = suppressed;
    }

    @Override
    public boolean equals(@Nullable Object obj) {
      if (obj instanceof Suppression) {
        Suppression other = (Suppression) obj;
        return closeable.equals(other.closeable)
            && thrown.equals(other.thrown)

  }

  public void testFinishToValueAndCloser_throwsAfterCallingFinishToFuture() throws Exception {
    ClosingFuture<Closeable> closingFuture =
        ClosingFuture.submit(closer -> closer.eventuallyClose(mockCloseable, executor), executor);
    FluentFuture<Closeable> unused = closingFuture.finishToFuture();
    assertThrows(
        IllegalStateException.class,
        () ->

    ClosingFuture<Closeable> closingFuture =
        ClosingFuture.submit(closer -> closer.eventuallyClose(mockCloseable, executor), executor);
    FluentFuture<Closeable> unused = closingFuture.finishToFuture();
    assertThrows(
        IllegalStateException.class,
        () -> {
          FluentFuture<Closeable> unused2 = closingFuture.finishToFuture();
        });
  }