java.lang.NullPointerException
        at org.netbeans.modules.groovy.editor.AstPath.find(AstPath.java:143)
        at org.netbeans.modules.groovy.editor.AstPath.findPathTo(AstPath.java:128)
        at org.netbeans.modules.groovy.editor.AstPath.<init>(AstPath.java:85)
        at org.netbeans.modules.groovy.editor.CodeCompleter.completeMethods(CodeCompleter.java:204)
        at org.netbeans.modules.groovy.editor.CodeCompleter.complete(CodeCompleter.java:322)
        at org.netbeans.modules.gsfret.editor.completion.GsfCompletionProvider$JavaCompletionQuery.resolveCompletion(GsfCompletionProvider.java:513)
        at org.netbeans.modules.gsfret.editor.completion.GsfCompletionProvider$JavaCompletionQuery.run(GsfCompletionProvider.java:399)
        at org.netbeans.modules.gsfret.editor.completion.GsfCompletionProvider$JavaCompletionQuery.run(GsfCompletionProvider.java:239)
        at org.netbeans.napi.gsfret.source.Source.runUserActionTask(Source.java:468)
        at org.netbeans.modules.gsfret.editor.completion.GsfCompletionProvider$JavaCompletionQuery.query(GsfCompletionProvider.java:308)
        at org.netbeans.spi.editor.completion.support.AsyncCompletionTask.run(AsyncCompletionTask.java:218)
        at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:561)
        at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:986)