}

  @J2ktIncompatible
  @GwtIncompatible // propagate
  public void testPropagate_noneDeclared_unchecked() {
    assertThrows(SomeUncheckedException.class, () -> propagate(new SomeUncheckedException()));
  }

  @J2ktIncompatible
  @GwtIncompatible // propagate
  public void testPropagate_noneDeclared_error() {
    assertThrows(SomeError.class, () -> propagate(new SomeError()));
  }

  @J2ktIncompatible

  }

  @J2ktIncompatible
  @GwtIncompatible // propagate
  public void testPropagate_noneDeclared_unchecked() {
    assertThrows(SomeUncheckedException.class, () -> propagate(new SomeUncheckedException()));
  }

  @J2ktIncompatible
  @GwtIncompatible // propagate
  public void testPropagate_noneDeclared_error() {
    assertThrows(SomeError.class, () -> propagate(new SomeError()));
  }

  @J2ktIncompatible

   * documentation.
   */
  public void add(Runnable runnable, Executor executor) {
    // Fail fast on a null. We throw NPE here because the contract of Executor states that it throws
    // NPE on null listener, so we propagate that contract up into the add method as well.
    checkNotNull(runnable, "Runnable was null.");
    checkNotNull(executor, "Executor was null.");

   *
   * <p>If the call {@code setFuture(delegate)} is accepted and this {@code Future} is later
   * cancelled, cancellation will be propagated to {@code delegate}. Additionally, any call to
   * {@code setFuture} after any cancellation will propagate cancellation to the supplied {@code
   * Future}.
   *
   * <p>Note that, even if the supplied future is cancelled and it causes this future to complete,

    Runnable bad =
        () -> {
          throw new BadRunnableException();
        };

    future.set(1);
    future.addListener(bad, directExecutor()); // BadRunnableException must not propagate.
  }

  public void testMisbehavingListenerLaterDone() {
    class BadRunnableException extends RuntimeException {}

    CountingRunnable before = new CountingRunnable();
    Runnable bad =

    Runnable bad =
        () -> {
          throw new BadRunnableException();
        };

    future.set(1);
    future.addListener(bad, directExecutor()); // BadRunnableException must not propagate.
  }

  public void testMisbehavingListenerLaterDone() {
    class BadRunnableException extends RuntimeException {}

    CountingRunnable before = new CountingRunnable();
    Runnable bad =

- Mask sensitive values (passwords, tokens)

## i18n / Localization
- This project supports up to 21 languages. When modifying user-facing strings, error codes, or labels, always propagate changes to ALL language files (fess_label_*.properties and frontend i18n files).

## Important Patterns for AI Assistants

### Do's
1. Use `@Resource` for field injection (not constructor injection)

     * @throws JobProcessingException if the script explicitly throws this exception
     *         (allows scripts to signal job-specific errors that should propagate)
     */
    @Override
    public Object evaluate(final String template, final Map<String, Object> paramMap) {
        if (StringUtil.isBlank(template)) {
            if (logger.isDebugEnabled()) {

  // A note on memory visibility.
  // Many of the utilities in this class (transform, withFallback, withTimeout, asList, combine)
  // have two requirements that significantly complicate their design.
  // 1. Cancellation should propagate from the returned future to the input future(s).
  // 2. The returned futures shouldn't unnecessarily 'pin' their inputs after completion.
  //

            throw new RuntimeException("Test exception");
        };

        try {
            ThreadDumpUtil.processThreadDump(exceptionConsumer);
            fail("Should propagate RuntimeException from consumer");
        } catch (RuntimeException e) {
            assertEquals("Test exception", e.getMessage());
        }
    }

    @Test