* otherwise-concurrent GC cycle.
   */
  private static final class TaskNonReentrantExecutor extends AtomicReference<RunningState>
      implements Executor, Runnable {

    /**
     * Used to update and read the latestTaskQueue field. Set to null once the runnable has been run
     * or queued.
     */
    @Nullable ExecutionSequencer sequencer;

    /**

    sequential1.execute(
        new Runnable() {
          @Override
          public void run() {
            whileRunningToString[0] = "" + currentTask[0];
          }

          @Override
          public String toString() {
            return "my runnable's toString";
          }
        });
    assertThat(whileRunningToString[0]).contains("my runnable's toString");
  }

              }
            }
          };
      thread.start();
      blockedThreads.add(thread);
    }
    for (int i = 0; i < numListeners; i++) {
      f.addListener(Runnables.doNothing(), directExecutor());
    }
    for (Thread thread : blockedThreads) {
      AbstractFutureBenchmarks.awaitWaiting(thread);
    }
    switch (state) {
      case NOT_DONE:
        break;

      // Log it and keep going -- bad runnable and/or executor. Don't punish the other runnables if
      // we're given a bad one. We only catch Exception because we want Errors to propagate up.
      log.get()
          .log(
              SEVERE,
              "RuntimeException while executing runnable "
                  + runnable
                  + " with executor "
                  + executor,
              e);
    }

    assertThat(result).isEqualTo(RETURN_VALUE);
  }

  public void testRunWithTimeout_returnsWithoutException() throws Exception {
    timeLimiter.runWithTimeout(Runnables.doNothing(), DELAY_MS, MILLISECONDS);
  }

  public void testRunWithTimeout_wrapsUncheckedException() throws Exception {
    RuntimeException exception = new RuntimeException("test");
    UncheckedExecutionException e =

    sequential1.execute(
        new Runnable() {
          @Override
          public void run() {
            whileRunningToString[0] = "" + currentTask[0];
          }

          @Override
          public String toString() {
            return "my runnable's toString";
          }
        });
    assertThat(whileRunningToString[0]).contains("my runnable's toString");
  }

    assertThat(result).isEqualTo(RETURN_VALUE);
  }

  public void testRunWithTimeout_returnsWithoutException() throws Exception {
    timeLimiter.runWithTimeout(Runnables.doNothing(), DELAY_MS, MILLISECONDS);
  }

  public void testRunWithTimeout_wrapsUncheckedException() throws Exception {
    RuntimeException exception = new RuntimeException("test");
    UncheckedExecutionException e =

    }

    @Override
    public T call() throws Exception {
      return delegate.call();
    }
  }

  private static final class WrappedRunnable implements Runnable {
    private final Runnable delegate;

    WrappedRunnable(Runnable delegate) {
      this.delegate = delegate;
    }

    @Override
    public void run() {
      delegate.run();
    }
  }

    }

    @Override
    public T call() throws Exception {
      return delegate.call();
    }
  }

  private static final class WrappedRunnable implements Runnable {
    private final Runnable delegate;

    WrappedRunnable(Runnable delegate) {
      this.delegate = delegate;
    }

    @Override
    public void run() {
      delegate.run();
    }
  }

import static com.google.common.util.concurrent.MoreExecutors.directExecutor;
import static com.google.common.util.concurrent.ReflectionFreeAssertThrows.assertThrows;
import static com.google.common.util.concurrent.Runnables.doNothing;
import static com.google.common.util.concurrent.TestPlatform.getDoneFromTimeoutOverload;
import static com.google.common.util.concurrent.TestPlatform.verifyGetOnPendingFuture;