#1572 ClassCastException

[Dominik]

HtmlUnit-2.10 worked, since at least HtmlUnit-2.12 and HtmlUnit-2.13 we get the following when reading a JavaScript enabled page:

======= EXCEPTION START ========
Exception class=[java.lang.ClassCastException]
com.gargoylesoftware.htmlunit.ScriptException: net.sourceforge.htmlunit.corejs.javascript.NativeArray cannot be cast to net.sourceforge.htmlunit.corejs.javascript.Arguments
at com.gargoylesoftware.htmlunit.javascript.JavaScriptEngine$HtmlUnitContextAction.run(JavaScriptEngine.java:684)
at net.sourceforge.htmlunit.corejs.javascript.Context.call(Context.java:602)
at net.sourceforge.htmlunit.corejs.javascript.ContextFactory.call(ContextFactory.java:507)
at com.gargoylesoftware.htmlunit.javascript.JavaScriptEngine.execute(JavaScriptEngine.java:570)
at com.gargoylesoftware.htmlunit.html.HtmlPage.loadExternalJavaScriptFile(HtmlPage.java:1062)
at com.gargoylesoftware.htmlunit.html.HtmlScript.executeScriptIfNeeded(HtmlScript.java:409)
at com.gargoylesoftware.htmlunit.html.HtmlScript$3.execute(HtmlScript.java:272)
at com.gargoylesoftware.htmlunit.html.HtmlScript.onAllChildrenAddedToPage(HtmlScript.java:286)
at com.gargoylesoftware.htmlunit.html.HTMLParser$HtmlUnitDOMBuilder.endElement(HTMLParser.java:683)
at org.apache.xerces.parsers.AbstractSAXParser.endElement(Unknown Source)
at com.gargoylesoftware.htmlunit.html.HTMLParser$HtmlUnitDOMBuilder.endElement(HTMLParser.java:642)
at org.cyberneko.html.HTMLTagBalancer.callEndElement(HTMLTagBalancer.java:1170)
at org.cyberneko.html.HTMLTagBalancer.endElement(HTMLTagBalancer.java:1072)
at org.cyberneko.html.filters.DefaultFilter.endElement(DefaultFilter.java:206)
at org.cyberneko.html.filters.NamespaceBinder.endElement(NamespaceBinder.java:330)
at org.cyberneko.html.HTMLScanner$ContentScanner.scanEndElement(HTMLScanner.java:3116)
at org.cyberneko.html.HTMLScanner$ContentScanner.scan(HTMLScanner.java:2083)
at org.cyberneko.html.HTMLScanner.scanDocument(HTMLScanner.java:918)
at org.cyberneko.html.HTMLConfiguration.parse(HTMLConfiguration.java:499)
at org.cyberneko.html.HTMLConfiguration.parse(HTMLConfiguration.java:452)
at org.apache.xerces.parsers.XMLParser.parse(Unknown Source)
at com.gargoylesoftware.htmlunit.html.HTMLParser$HtmlUnitDOMBuilder.parse(HTMLParser.java:899)
at com.gargoylesoftware.htmlunit.html.HTMLParser.parse(HTMLParser.java:242)
at com.gargoylesoftware.htmlunit.html.HTMLParser.parseHtml(HTMLParser.java:188)
at com.gargoylesoftware.htmlunit.DefaultPageCreator.createHtmlPage(DefaultPageCreator.java:268)
at com.gargoylesoftware.htmlunit.DefaultPageCreator.createPage(DefaultPageCreator.java:156)
at com.gargoylesoftware.htmlunit.WebClient.loadWebResponseInto(WebClient.java:437)
at com.gargoylesoftware.htmlunit.WebClient.getPage(WebClient.java:311)
at com.gargoylesoftware.htmlunit.WebClient.getPage(WebClient.java:376)
at com.gargoylesoftware.htmlunit.WebClient.getPage(WebClient.java:361)

[Dominik]

Full stacktrace:

======= EXCEPTION START ========
Exception class=[java.lang.ClassCastException]
com.gargoylesoftware.htmlunit.ScriptException: net.sourceforge.htmlunit.corejs.javascript.NativeArray cannot be cast to net.sourceforge.htmlunit.corejs.javascript.Arguments
at com.gargoylesoftware.htmlunit.javascript.JavaScriptEngine$HtmlUnitContextAction.run(JavaScriptEngine.java:684)
at net.sourceforge.htmlunit.corejs.javascript.Context.call(Context.java:602)
at net.sourceforge.htmlunit.corejs.javascript.ContextFactory.call(ContextFactory.java:507)
at com.gargoylesoftware.htmlunit.javascript.JavaScriptEngine.execute(JavaScriptEngine.java:570)
at com.gargoylesoftware.htmlunit.html.HtmlPage.loadExternalJavaScriptFile(HtmlPage.java:1062)
at com.gargoylesoftware.htmlunit.html.HtmlScript.executeScriptIfNeeded(HtmlScript.java:409)
at com.gargoylesoftware.htmlunit.html.HtmlScript$3.execute(HtmlScript.java:272)
at com.gargoylesoftware.htmlunit.html.HtmlScript.onAllChildrenAddedToPage(HtmlScript.java:286)
at com.gargoylesoftware.htmlunit.html.HTMLParser$HtmlUnitDOMBuilder.endElement(HTMLParser.java:683)
at org.apache.xerces.parsers.AbstractSAXParser.endElement(Unknown Source)
at com.gargoylesoftware.htmlunit.html.HTMLParser$HtmlUnitDOMBuilder.endElement(HTMLParser.java:642)
at org.cyberneko.html.HTMLTagBalancer.callEndElement(HTMLTagBalancer.java:1170)
at org.cyberneko.html.HTMLTagBalancer.endElement(HTMLTagBalancer.java:1072)
at org.cyberneko.html.filters.DefaultFilter.endElement(DefaultFilter.java:206)
at org.cyberneko.html.filters.NamespaceBinder.endElement(NamespaceBinder.java:330)
at org.cyberneko.html.HTMLScanner$ContentScanner.scanEndElement(HTMLScanner.java:3116)
at org.cyberneko.html.HTMLScanner$ContentScanner.scan(HTMLScanner.java:2083)
at org.cyberneko.html.HTMLScanner.scanDocument(HTMLScanner.java:918)
at org.cyberneko.html.HTMLConfiguration.parse(HTMLConfiguration.java:499)
at org.cyberneko.html.HTMLConfiguration.parse(HTMLConfiguration.java:452)
at org.apache.xerces.parsers.XMLParser.parse(Unknown Source)
at com.gargoylesoftware.htmlunit.html.HTMLParser$HtmlUnitDOMBuilder.parse(HTMLParser.java:899)
at com.gargoylesoftware.htmlunit.html.HTMLParser.parse(HTMLParser.java:242)
at com.gargoylesoftware.htmlunit.html.HTMLParser.parseHtml(HTMLParser.java:188)
at com.gargoylesoftware.htmlunit.DefaultPageCreator.createHtmlPage(DefaultPageCreator.java:268)
at com.gargoylesoftware.htmlunit.DefaultPageCreator.createPage(DefaultPageCreator.java:156)
at com.gargoylesoftware.htmlunit.WebClient.loadWebResponseInto(WebClient.java:437)
at com.gargoylesoftware.htmlunit.WebClient.getPage(WebClient.java:311)
at com.gargoylesoftware.htmlunit.WebClient.getPage(WebClient.java:376)
at com.gargoylesoftware.htmlunit.WebClient.getPage(WebClient.java:361)
...
Caused by: java.lang.ClassCastException: net.sourceforge.htmlunit.corejs.javascript.NativeArray cannot be cast to net.sourceforge.htmlunit.corejs.javascript.Arguments
at net.sourceforge.htmlunit.corejs.javascript.Interpreter.enterFrame(Interpreter.java:2929)
at net.sourceforge.htmlunit.corejs.javascript.Interpreter.initFrame(Interpreter.java:2914)
at net.sourceforge.htmlunit.corejs.javascript.Interpreter.interpretLoop(Interpreter.java:1443)
at net.sourceforge.htmlunit.corejs.javascript.Interpreter.interpret(Interpreter.java:798)
at net.sourceforge.htmlunit.corejs.javascript.InterpretedFunction.call(InterpretedFunction.java:105)
at net.sourceforge.htmlunit.corejs.javascript.ContextFactory.doTopCall(ContextFactory.java:405)
at com.gargoylesoftware.htmlunit.javascript.HtmlUnitContextFactory.doTopCall(HtmlUnitContextFactory.java:309)
at net.sourceforge.htmlunit.corejs.javascript.ScriptRuntime.doTopCall(ScriptRuntime.java:3031)
at net.sourceforge.htmlunit.corejs.javascript.InterpretedFunction.exec(InterpretedFunction.java:115)
at com.gargoylesoftware.htmlunit.javascript.JavaScriptEngine$3.doRun(JavaScriptEngine.java:561)
at com.gargoylesoftware.htmlunit.javascript.JavaScriptEngine$HtmlUnitContextAction.run(JavaScriptEngine.java:669)
... 54 more
Enclosed exception:
java.lang.ClassCastException: net.sourceforge.htmlunit.corejs.javascript.NativeArray cannot be cast to net.sourceforge.htmlunit.corejs.javascript.Arguments
at net.sourceforge.htmlunit.corejs.javascript.Interpreter.enterFrame(Interpreter.java:2929)
at net.sourceforge.htmlunit.corejs.javascript.Interpreter.initFrame(Interpreter.java:2914)
at net.sourceforge.htmlunit.corejs.javascript.Interpreter.interpretLoop(Interpreter.java:1443)
at net.sourceforge.htmlunit.corejs.javascript.Interpreter.interpret(Interpreter.java:798)
at net.sourceforge.htmlunit.corejs.javascript.InterpretedFunction.call(InterpretedFunction.java:105)
at net.sourceforge.htmlunit.corejs.javascript.ContextFactory.doTopCall(ContextFactory.java:405)
at com.gargoylesoftware.htmlunit.javascript.HtmlUnitContextFactory.doTopCall(HtmlUnitContextFactory.java:309)
at net.sourceforge.htmlunit.corejs.javascript.ScriptRuntime.doTopCall(ScriptRuntime.java:3031)
at net.sourceforge.htmlunit.corejs.javascript.InterpretedFunction.exec(InterpretedFunction.java:115)
at com.gargoylesoftware.htmlunit.javascript.JavaScriptEngine$3.doRun(JavaScriptEngine.java:561)
at com.gargoylesoftware.htmlunit.javascript.JavaScriptEngine$HtmlUnitContextAction.run(JavaScriptEngine.java:669)
at net.sourceforge.htmlunit.corejs.javascript.Context.call(Context.java:602)
at net.sourceforge.htmlunit.corejs.javascript.ContextFactory.call(ContextFactory.java:507)
at com.gargoylesoftware.htmlunit.javascript.JavaScriptEngine.execute(JavaScriptEngine.java:570)
at com.gargoylesoftware.htmlunit.html.HtmlPage.loadExternalJavaScriptFile(HtmlPage.java:1062)
at com.gargoylesoftware.htmlunit.html.HtmlScript.executeScriptIfNeeded(HtmlScript.java:409)
at com.gargoylesoftware.htmlunit.html.HtmlScript$3.execute(HtmlScript.java:272)
at com.gargoylesoftware.htmlunit.html.HtmlScript.onAllChildrenAddedToPage(HtmlScript.java:286)
at com.gargoylesoftware.htmlunit.html.HTMLParser$HtmlUnitDOMBuilder.endElement(HTMLParser.java:683)
at org.apache.xerces.parsers.AbstractSAXParser.endElement(Unknown Source)
at com.gargoylesoftware.htmlunit.html.HTMLParser$HtmlUnitDOMBuilder.endElement(HTMLParser.java:642)
at org.cyberneko.html.HTMLTagBalancer.callEndElement(HTMLTagBalancer.java:1170)
at org.cyberneko.html.HTMLTagBalancer.endElement(HTMLTagBalancer.java:1072)
at org.cyberneko.html.filters.DefaultFilter.endElement(DefaultFilter.java:206)
at org.cyberneko.html.filters.NamespaceBinder.endElement(NamespaceBinder.java:330)
at org.cyberneko.html.HTMLScanner$ContentScanner.scanEndElement(HTMLScanner.java:3116)
at org.cyberneko.html.HTMLScanner$ContentScanner.scan(HTMLScanner.java:2083)
at org.cyberneko.html.HTMLScanner.scanDocument(HTMLScanner.java:918)
at org.cyberneko.html.HTMLConfiguration.parse(HTMLConfiguration.java:499)
at org.cyberneko.html.HTMLConfiguration.parse(HTMLConfiguration.java:452)
at org.apache.xerces.parsers.XMLParser.parse(Unknown Source)
at com.gargoylesoftware.htmlunit.html.HTMLParser$HtmlUnitDOMBuilder.parse(HTMLParser.java:899)
at com.gargoylesoftware.htmlunit.html.HTMLParser.parse(HTMLParser.java:242)
at com.gargoylesoftware.htmlunit.html.HTMLParser.parseHtml(HTMLParser.java:188)
at com.gargoylesoftware.htmlunit.DefaultPageCreator.createHtmlPage(DefaultPageCreator.java:268)
at com.gargoylesoftware.htmlunit.DefaultPageCreator.createPage(DefaultPageCreator.java:156)
at com.gargoylesoftware.htmlunit.WebClient.loadWebResponseInto(WebClient.java:437)
at com.gargoylesoftware.htmlunit.WebClient.getPage(WebClient.java:311)
at com.gargoylesoftware.htmlunit.WebClient.getPage(WebClient.java:376)
at com.gargoylesoftware.htmlunit.WebClient.getPage(WebClient.java:361)
...
======= EXCEPTION END ========

[Ahmed Ashour]

Can you provide the page, so others can reproduce the issue.

[Dominik]

I could narrow it down to the attached sample page, it just includes one javascript file from IceFaces, the following unit test triggers this for me when I put the two files into the htdocs folder of an Apache Server running locally:

public void testHtmlUnit() throws Exception {
    final WebClient webClient = new WebClient();
    webClient.getOptions().setJavaScriptEnabled(true);
    HtmlPage page = webClient.getPage("http://localhost:8011/easyTravel.htm");
    assertNotNull(page);
    webClient.closeAllWindows();
}

[Ahmed Ashour]

Example of small test case is below.

Stay Tuned!

<script>
        function test() {
            var fun = registerListener;
            var curriedArguments = [];
            apply(fun, curriedArguments);
        }
        function registerListener(eventType, obj, listener) {
            alert("hello");
        }
        function apply(fun, arguments) {
            return fun.apply(fun, arguments);
        }
        test();
</script>

[Ahmed Ashour]

Thanks for reporting, fixed in SVN.

[Dominik]

I see only tests being added in SVN, is this really fixed or are some checkins missing?

Thanks... Dominik

[Ahmed Ashour]

Thanks for the trust, hehe!

The fix was done in core-js, and a non-failing test was added

Enjoy!

[Dominik]

No problem, I certainly trust you guys, only I was looking for the actual fix to see if I can patch my current version of HtmlUnit to not having to use SVN latest.

And thanks for the quick responses!