java.lang.AssertionError: Unexpected tag type: ENDTAG
        at org.netbeans.editor.ext.html.parser.SyntaxTree.makeTree(SyntaxTree.java:227)
        at org.netbeans.modules.html.editor.gsf.HtmlParserResult.root(HtmlParserResult.java:93)
        at org.netbeans.modules.html.editor.gsf.HtmlParserResult.<init>(HtmlParserResult.java:82)
        at org.netbeans.modules.html.editor.gsf.HtmlGSFParser.parse(HtmlGSFParser.java:113)
        at org.netbeans.modules.html.editor.gsf.HtmlGSFParser.parse(HtmlGSFParser.java:74)
        at org.netbeans.modules.parsing.impl.SourceCache.getResult(SourceCache.java:198)
        at org.netbeans.modules.parsing.impl.TaskProcessor$CompilationJob.run(TaskProcessor.java:655)
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:417)
        at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:269)
        at java.util.concurrent.FutureTask.run(FutureTask.java:123)
        at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:650)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:675)
        at java.lang.Thread.run(Thread.java:613)