java.lang.NullPointerException
   at org.netbeans.modules.xml.schema.completion.util.CompletionUtil.getEndTagCompletionItem(CompletionUtil.java:899)
   at org.netbeans.modules.xml.schema.completion.CompletionQuery.query(CompletionQuery.java:129)
   at org.netbeans.spi.editor.completion.support.AsyncCompletionTask.run(AsyncCompletionTask.java:223)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1443)
   at org.netbeans.modules.openide.util.GlobalLookup.execute(GlobalLookup.java:68)
   at org.openide.util.lookup.Lookups.executeWith(Lookups.java:303)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2058)