java.lang.NullPointerException
        at org.netbeans.modules.refactoring.javascript.JsElementCtx.<init>(JsElementCtx.java:132)
        at org.netbeans.modules.refactoring.javascript.plugins.JsWhereUsedQueryPlugin$FindTask.find(JsWhereUsedQueryPlugin.java:646)
        at org.netbeans.modules.refactoring.javascript.plugins.JsWhereUsedQueryPlugin$FindTask.find(JsWhereUsedQueryPlugin.java:657)
        at org.netbeans.modules.refactoring.javascript.plugins.JsWhereUsedQueryPlugin$FindTask.find(JsWhereUsedQueryPlugin.java:657)
        at org.netbeans.modules.refactoring.javascript.plugins.JsWhereUsedQueryPlugin$FindTask.find(JsWhereUsedQueryPlugin.java:657)
        at org.netbeans.modules.refactoring.javascript.plugins.JsWhereUsedQueryPlugin$FindTask.find(JsWhereUsedQueryPlugin.java:657)
        at org.netbeans.modules.refactoring.javascript.plugins.JsWhereUsedQueryPlugin$FindTask.find(JsWhereUsedQueryPlugin.java:657)
        at org.netbeans.modules.refactoring.javascript.plugins.JsWhereUsedQueryPlugin$FindTask.find(JsWhereUsedQueryPlugin.java:657)
        at org.netbeans.modules.refactoring.javascript.plugins.JsWhereUsedQueryPlugin$FindTask.find(JsWhereUsedQueryPlugin.java:657)
        at org.netbeans.modules.refactoring.javascript.plugins.JsWhereUsedQueryPlugin$FindTask.find(JsWhereUsedQueryPlugin.java:657)
        at org.netbeans.modules.refactoring.javascript.plugins.JsWhereUsedQueryPlugin$FindTask.run(JsWhereUsedQueryPlugin.java:480)
        at org.netbeans.modules.refactoring.javascript.plugins.JsWhereUsedQueryPlugin$FindTask.run(JsWhereUsedQueryPlugin.java:340)
        at org.netbeans.napi.gsfret.source.Source.runModificationTask(Source.java:610)
        at org.netbeans.modules.refactoring.javascript.plugins.JsRefactoringPlugin.processFiles(JsRefactoringPlugin.java:212)
        at org.netbeans.modules.refactoring.javascript.plugins.JsWhereUsedQueryPlugin.prepare(JsWhereUsedQueryPlugin.java:290)
        at org.netbeans.modules.refactoring.api.AbstractRefactoring.pluginsPrepare2(AbstractRefactoring.java:419)
        at org.netbeans.modules.refactoring.api.AbstractRefactoring.pluginsPrepare(AbstractRefactoring.java:403)
        at org.netbeans.modules.refactoring.api.AbstractRefactoring.prepare(AbstractRefactoring.java:214)
        at org.netbeans.modules.refactoring.spi.impl.ParametersPanel$Prepare.run(ParametersPanel.java:787)
        at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:573)
        at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:1005)