A copy paste typo in org.apache.solr.highlight.DefaultSolrHighlighter#init:
// Load the formatters
SolrFormatter fmt = solrCore.initPlugins(info.getChildren("formatter"),
formatters,SolrFormatter.class,null);
if (fmt == null) fmt = new HtmlFormatter();
formatters.put("", fmt);
formatters.put(null, fmt);
// Load the formatters
SolrEncoder enc = solrCore.initPlugins(info.getChildren("encoder"),
encoders,SolrEncoder.class,null);
if (enc == null) enc = new DefaultEncoder();
encoders.put("", enc);
encoders.put(null, enc);
The second comment should be “// Load the encoders”.
-- Jack Krupansky