// misconfigured mock. Try to switch to Failure.
          Failure failure;
          try {
            failure = new Failure(t);
          } catch (Exception | Error oomMostLikely) { // sneaky checked exception
            failure = Failure.FALLBACK_INSTANCE;
          }

    checkNotNull(throwable);
    if (!state.permitsPublicUserToTransitionTo(State.FAILURE)) {
      return false;
    }

    forceSetException(throwable);
    return true;
  }

  private void forceSetException(Throwable throwable) {
    this.throwable = throwable;
    this.state = State.FAILURE;
    notifyAndClearListeners();
  }

  @CanIgnoreReturnValue