tag.setId(matcher.group(4).substring(1));
                }
                return tag;
            }
            throw new FessSystemException("Invalid pruned tag format: '" + v
                    + "'. Expected format: tagname[attr=value].classname#id (e.g., div.content, span#header, p[data-type=ad])");
        }).toArray(n -> new PrunedTag[n]));
    }

    }

    @Test
    public void test_multipleNestedExceptions() {
        // Test with multiple nested exceptions
        Exception innerCause = new IllegalArgumentException("Invalid image format");
        Exception middleCause = new RuntimeException("Processing failed", innerCause);
        ThumbnailGenerationException exception = new ThumbnailGenerationException("Thumbnail generation error", middleCause);

To do this, run the following command:

```bash
gpg --sign-key 1BD97A6A154E7810EE0BC832E2F38302C8075E3D
```

## Public Key Block in ascii-armored format

```
-----BEGIN PGP PUBLIC KEY BLOCK-----

mQINBGOtCzoBEAC7hGOPLFnfvQKzCZpJb3QYq8X9OiUL4tVa5mG0lDTeBBiuQCDy
Iyhpo8IypllGG6Wxj6ZJbhuHXcnXSu/atmtrnnjARMvDnQ20jX77B+g39ZYuqxgw

     * Initializes the extension override map by loading configuration from FessConfig.
     * The mappings are loaded from the crawler.document.mimetype.extension.overrides property,
     * where each line contains a mapping in the format ".ext=mime/type".
     */
    @PostConstruct
    public void init() {
        final String overrides = ComponentUtil.getFessConfig().getCrawlerDocumentMimetypeExtensionOverrides();

    /**
     * Default constructor.
     */
    public MonitorTarget() {
        // Default constructor
    }

    /**
     * Appends a key-value pair to the buffer in JSON format.
     *
     * @param buf the string buffer to append to
     * @param key the key name
     * @param supplier the value supplier
     * @return the updated buffer
     */

import java.io.IOException;
import java.io.Reader;
import java.io.Writer;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.time.LocalDateTime;
import java.time.format.DateTimeFormatter;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Set;
import java.util.stream.Collectors;

import org.apache.logging.log4j.LogManager;

        validate(form, messages -> {}, this::asIndexHtml);
        verifyTokenKeep(this::asIndexHtml);

        final String diagnosticId = "log" + new SimpleDateFormat("yyyyMMddHHmm").format(ComponentUtil.getSystemHelper().getCurrentTime());
        return asStream(diagnosticId + ".zip").contentTypeOctetStream().stream(out -> {
            try (ZipOutputStream zos = new ZipOutputStream(out.stream())) {

            File docInfo = new File(destinationDirectory, docInfoName);
            try {
                Files.write(docInfo.toPath(), Collections.singleton(String.format("<meta name=\"adoc-src-path\" content=\"%s\">", relativePath)), StandardOpenOption.CREATE);
            } catch (IOException e) {
                throw UncheckedException.throwAsUncheckedException(e);
            }
        });

  im_cmd=$(get_imagemagick_cmd)
  if [[ -z "${im_cmd}" ]] ; then
    echo "ImageMagick (convert or magick) does not exist."
    exit 1
  fi
  target_file=$(echo "$url" | sed -e "s#^file:/*#/#g")
  # Build format hint from MIME type for better ImageMagick compatibility
  format_hint=""
  case "${mimetype}" in
    "image/gif")  format_hint="gif:" ;;
    "image/tiff") format_hint="tiff:" ;;
    "image/png")  format_hint="png:" ;;

        assertFalse("Should capture some thread dump output", capturedOutput.isEmpty());

        // Verify format - should contain "Thread:" entries
        boolean hasThreadEntry = capturedOutput.stream().anyMatch(line -> line.startsWith("Thread:"));
        assertTrue("Should contain Thread: entries", hasThreadEntry);

        // Verify format - should contain stack trace entries