public void testCatchingAsync_fallbackGeneratesError() throws Exception {
    final Error error = new Error("deliberate");
    AsyncFunction<Throwable, Integer> fallback =
        new AsyncFunction<Throwable, Integer>() {
          @Override
          public ListenableFuture<Integer> apply(Throwable t) throws Exception {
            throw error;
          }
        };

    /** The key of the message: Error Count */
    public static final String LABELS_ERROR_COUNT = "{labels.errorCount}";

    /** The key of the message: Error Log */
    public static final String LABELS_ERROR_LOG = "{labels.errorLog}";

    /** The key of the message: Error Name */
    public static final String LABELS_ERROR_NAME = "{labels.errorName}";

        return lockedGetOrLoad(key, hash, loader);
      } catch (ExecutionException ee) {
        Throwable cause = ee.getCause();
        if (cause instanceof Error) {
          throw new ExecutionError((Error) cause);
        } else if (cause instanceof RuntimeException) {
          throw new UncheckedExecutionException(cause);
        }
        throw ee;
      } finally {

    /** The key of the message: </div> */
    public static final String ERRORS_front_suffix = "{errors.front_suffix}";

    /** The key of the message: <ul class="has-error"> */
    public static final String ERRORS_HEADER = "{errors.header}";

    /** The key of the message: </ul> */
    public static final String ERRORS_FOOTER = "{errors.footer}";