this.delegate = delegate;
    }

    @Override
    public void run() {
      if (isCancelled()) {
        return;
      }

      if (delegate instanceof AbstractFuture) {
        AbstractFuture<? extends V> other = (AbstractFuture<? extends V>) delegate;
        value = other.value;
        throwable = other.throwable;
        // don't copy the mayInterruptIfRunning bit, for consistency with the server, to ensure that

    AbstractFuture<String> evilFuture =
        new AbstractFuture<String>() {
          @Override
          public void addListener(Runnable r, Executor e) {
            throw exception;
          }
        };
    AbstractFuture<String> normalFuture = new AbstractFuture<String>() {};
    normalFuture.setFuture(evilFuture);

/**
 * Base class for tests for emulated {@link AbstractFuture} that allow subclasses to swap in a
 * different "source Future" for {@link AbstractFuture#setFuture} calls.
 */
@GwtCompatible(emulated = true)
abstract class AbstractAbstractFutureTest extends TestCase {
  private TestedFuture<Integer> future;
  private AbstractFuture<Integer> delegate;

  abstract AbstractFuture<Integer> newDelegate();

  @Override

/**
 * Base class for tests for emulated {@link AbstractFuture} that allow subclasses to swap in a
 * different "source Future" for {@link AbstractFuture#setFuture} calls.
 */
@GwtCompatible(emulated = true)
abstract class AbstractAbstractFutureTest extends TestCase {
  private TestedFuture<Integer> future;
  private AbstractFuture<Integer> delegate;

  abstract AbstractFuture<Integer> newDelegate();

  @Override

import com.google.common.util.concurrent.AbstractFutureBenchmarks.Impl;
import java.util.HashSet;
import java.util.Set;
import java.util.concurrent.Executor;

/** Measures the size of AbstractFuture implementations. */
public class AbstractFutureFootprintBenchmark {

  enum State {
    NOT_DONE,
    FINISHED,
    CANCELLED,
    FAILED
  }

  @Param State state;
  @Param Impl impl;

import java.util.concurrent.Executor;
import java.util.concurrent.Future;
import java.util.concurrent.TimeUnit;
import javax.annotation.concurrent.GuardedBy;
import junit.framework.TestCase;

/** Tests for {@link AbstractFuture} with the cancellation cause system property set */
@AndroidIncompatible // custom classloading

public class AbstractFutureCancellationCauseTest extends TestCase {

  private ClassLoader oldClassLoader;

import java.util.concurrent.Executor;
import java.util.concurrent.Future;
import java.util.concurrent.TimeUnit;
import javax.annotation.concurrent.GuardedBy;
import junit.framework.TestCase;

/** Tests for {@link AbstractFuture} with the cancellation cause system property set */
@AndroidIncompatible // custom classloading

public class AbstractFutureCancellationCauseTest extends TestCase {

  private ClassLoader oldClassLoader;

     *
     * - Any kind of Error from a listener. Even if we could distinguish that case (by exposing some
     * extra state from AbstractFuture), our options are limited: A call to setException() would be
     * a no-op. We could log, but if that's what we really want, we should modify
     * AbstractFuture.executeListener to do so, since that method would have the ability to continue
     * to execute other listeners.
     *

    @CanIgnoreReturnValue
    boolean set(T t);

    @CanIgnoreReturnValue
    boolean setException(Throwable t);
  }

  private static class NewAbstractFutureFacade<T> extends AbstractFuture<T> implements Facade<T> {
    @CanIgnoreReturnValue
    @Override
    public boolean set(T t) {
      return super.set(t);
    }

    @CanIgnoreReturnValue
    @Override

import org.checkerframework.checker.nullness.qual.Nullable;

/** Emulation of AggregateFutureState. */
@ElementTypesAreNonnullByDefault
abstract class AggregateFutureState<OutputT extends @Nullable Object>
    extends AbstractFuture.TrustedFuture<OutputT> {
  // Lazily initialized the first time we see an exception; not released until all the input futures
  // & this future completes. Released when the future releases the reference to the running state