Issue #3202876 by eelkeblok, djassie, mradcliffe: Installation error:...

      $containerNamespaces->offsetSet('Drupal\\markdown', str_replace(\Drupal::root() . '/', '', $src));

    }

    // Add services that are not available yet, but are required by the classes

    // above. The container rebuild after module installation should reset these

    // to what is defined in markdown.services.yml.

    if (!\Drupal::hasService('logger.channel.markdown')) {

      $markdownLogger = \Drupal::service('logger.factory')->get('markdown');

      \Drupal::getContainer()->set('logger.channel.markdown', $markdownLogger);

    }

    if (!\Drupal::hasService('cache.markdown')) {

      $markdownCache = \Drupal::service('cache_factory')->get('markdown');

      \Drupal::getContainer()->set('cache.markdown', $markdownCache);

    }

    $parserManager = ParserManager::create();

  }