java.lang.NegativeArraySizeException
   at org.netbeans.editor.BaseDocument.getChars(BaseDocument.java:1188)
   at org.netbeans.editor.Utilities.getIdentifierBefore(Utilities.java:725)
   at org.netbeans.lib.editor.codetemplates.CodeTemplateCompletionProvider$Query.query(CodeTemplateCompletionProvider.java:174)
   at org.netbeans.spi.editor.completion.support.AsyncCompletionTask.run(AsyncCompletionTask.java:223)
   at org.openide.util.RequestProcessor$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$Processor.run(RequestProcessor.java:2058)
Caused: org.openide.util.RequestProcessor$FastItem: task failed due to: java.lang.NegativeArraySizeException