In method java.util.prefs.XmlSupport.loadPrefsDoc(InputStream) there is an assignment to a local object called r, but it is never used in the method.

   private static Document loadPrefsDoc(InputStream in)
        throws SAXException, IOException
    {
        Resolver r = new Resolver(); // <------- here
        DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
        dbf.setIgnoringElementContentWhitespace(true);
        dbf.setValidating(true);
        dbf.setCoalescing(true);
        dbf.setIgnoringComments(true);
        try {
            DocumentBuilder db = dbf.newDocumentBuilder();
            db.setEntityResolver(new Resolver()); // <----- we create it here anyway
            db.setErrorHandler(new EH());
            return db.parse(new InputSource(in));
        } catch (ParserConfigurationException e) {
            throw new AssertionError(e);
        }
    }


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