anchor.diff:     * locale.
      */
     static String getCurrentLocale() {
  -    if (_defaultLocale == null) _defaultLocale = systemLocale;
  -    return _defaultLocale;
  +    if (defaultLocale == null) defaultLocale = systemLocale;
  +    return defaultLocale;
     }
   
     toString() => "Intl($locale)";
  
positive.code:    * can also be set explicitly, and will then apply to any new instances where
     * the locale isn't specified.
     */
    static String _defaultLocale;
  
    /**
     * The system's locale, as obtained from the window.navigator.language
  
negative.code:     // but must be a static variable in order to be visible to the Intl.message
      // invocation.
      var oldLocale = getCurrentLocale();
      defaultLocale = locale;
      var result = message_function();
      defaultLocale = oldLocale;
      return result;
    }
  
  