java.lang.AbstractMethodError: org.netbeans.modules.ruby.RubyCodeCompleter.getApplicableTemplates(Ljavax/swing/text/Document;II)Ljava/util/Set;
   at org.netbeans.modules.csl.editor.codetemplates.GsfCodeTemplateFilter.<init>(GsfCodeTemplateFilter.java:75)
   at org.netbeans.modules.csl.editor.codetemplates.GsfCodeTemplateFilter.<init>(GsfCodeTemplateFilter.java:62)
   at org.netbeans.modules.csl.editor.codetemplates.GsfCodeTemplateFilter$Factory.createFilter(GsfCodeTemplateFilter.java:96)
   at org.netbeans.lib.editor.codetemplates.CodeTemplateManagerOperation.getTemplateFilters(CodeTemplateManagerOperation.java:230)
   at org.netbeans.lib.editor.codetemplates.CodeTemplateCompletionProvider$Query.query(CodeTemplateCompletionProvider.java:197)
   at org.netbeans.spi.editor.completion.support.AsyncCompletionTask.run(AsyncCompletionTask.java:223)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1424)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:1968)
Caused: org.openide.util.RequestProcessor$FastItem: task failed due to: java.lang.AbstractMethodError: org.netbeans.modules.ruby.RubyCodeCompleter.getApplicableTemplates(Ljavax/swing/text/Document;II)Ljava/util/Set;