Issue #3270309 by codebymikey, eiriksm: HtmlLinkExtractor crashes when saving...

   *   TRUE if URL should be checked.

   */

  protected function isUrlBlacklisted($url) {

    if (mb_strlen($url) > 2048) {

      // The URL is too long for Drupal to save/process. So ignore it.

      return TRUE;

    }

    // Is url in domain blacklist?

    $urls = $this->linkcheckerSetting->get('check.disable_link_check_for_urls');

    if (!empty($urls) && preg_match('/' . implode('|', array_map(function ($links) {return preg_quote($links, '/');}, preg_split('/(\r\n?|\n)/', $urls))) . '/', $url)) {