Using this java in a Tapestry page

public String getTesting()
{
return "";
}

and this OGNL statement on the HTML

<if jwcid="@If" condition="ognl:testing instanceof java.lang.Object">
    howdy
</if>

Produces the following stack trace in the console, but still renders fine on the page


java.lang.VerifyError: (class: $ASTInstanceof_113b6c26985, method: get signature: (Lognl/OgnlContext;Ljava/lang/Object;)Ljava/lang/Object;) Wrong return type in function
at java.lang.Class.getDeclaredConstructors0(Native Method)
at java.lang.Class.privateGetDeclaredConstructors(Class.java:2357)
at java.lang.Class.getConstructor0(Class.java:2671)
at java.lang.Class.newInstance0(Class.java:321)
at java.lang.Class.newInstance(Class.java:303)
at org.apache.tapestry.services.impl.HiveMindExpressionCompiler.compileExpression(HiveMindExpressionCompiler.java:220)
at ognl.OgnlRuntime.compileExpression(OgnlRuntime.java:498)
at ognl.Ognl.compileExpression(Ognl.java:141)07-07-11 14:31:32 ERROR (HiveMindExpressionCompiler.java:224) - Error generating OGNL statements for expression testing instanceof java.lang.Object with root $DirectorAccount_110@3c1[DirectorAccount]
java.lang.VerifyError: (class: $ASTInstanceof_113b6c26985, method: get signature: (Lognl/OgnlContext;Ljava/lang/Object;)Ljava/lang/Object;) Wrong return type in function
at java.lang.Class.getDeclaredConstructors0(Native Method)
at java.lang.Class.privateGetDeclaredConstructors(Class.java:2357)
at java.lang.Class.getConstructor0(Class.java:2671)
at java.lang.Class.newInstance0(Class.java:321)
at java.lang.Class.newInstance(Class.java:303)
at org.apache.tapestry.services.impl.HiveMindExpressionCompiler.compileExpression(HiveMindExpressionCompiler.java:220)
at ognl.OgnlRuntime.compileExpression(OgnlRuntime.java:498)
at ognl.Ognl.compileExpression(Ognl.java:141)
at org.apache.tapestry.services.impl.ExpressionCacheImpl.parse(ExpressionCacheImpl.java:152)
at org.apache.tapestry.services.impl.ExpressionCacheImpl.getCompiledExpression(ExpressionCacheImpl.java:115)
at $ExpressionCache_113b6c26808.getCompiledExpression($ExpressionCache_113b6c26808.java)
at org.apache.tapestry.binding.ExpressionBinding.resolveExpression(ExpressionBinding.java:134)
at org.apache.tapestry.binding.ExpressionBinding.getObject(ExpressionBinding.java:125)
at org.apache.tapestry.binding.AbstractBinding.getObject(AbstractBinding.java:84)
at org.apache.tapestry.enhance.EnhanceUtils.toBoolean(EnhanceUtils.java:173)
at $IfBean_112.getCondition($IfBean_112.java)
at org.apache.tapestry.components.IfBean.evaluateCondition(IfBean.java:128)
at org.apache.tapestry.components.IfBean.renderComponent(IfBean.java:66)
at org.apache.tapestry.AbstractComponent.render(AbstractComponent.java:725)
at org.apache.tapestry.services.impl.DefaultResponseBuilder.render(DefaultResponseBuilder.java:180)
at org.apache.tapestry.BaseComponent.renderComponent(BaseComponent.java:107)
at org.apache.tapestry.AbstractComponent.render(AbstractComponent.java:725)
at org.apache.tapestry.services.impl.DefaultResponseBuilder.render(DefaultResponseBuilder.java:178)
at org.apache.tapestry.AbstractPage.renderPage(AbstractPage.java:249)
at org.apache.tapestry.engine.RequestCycle.renderPage(RequestCycle.java:397)
at org.apache.tapestry.services.impl.DefaultResponseBuilder.renderResponse(DefaultResponseBuilder.java:152)
at org.apache.tapestry.services.impl.ResponseRendererImpl.renderResponse(ResponseRendererImpl.java:33)
at $ResponseRenderer_113b6c26698.renderResponse($ResponseRenderer_113b6c26698.java)
at org.apache.tapestry.engine.PageService.service(PageService.java:68)
at $IEngineService_113b6c2672a.service($IEngineService_113b6c2672a.java)
at org.apache.tapestry.services.impl.EngineServiceOuterProxy.service(EngineServiceOuterProxy.java:72)
at org.apache.tapestry.engine.AbstractEngine.service(AbstractEngine.java:237)
at org.apache.tapestry.services.impl.InvokeEngineTerminator.service(InvokeEngineTerminator.java:54)
at $WebRequestServicer_113b6c26705.service($WebRequestServicer_113b6c26705.java)
at org.apache.tapestry.services.impl.DisableCachingFilter.service(DisableCachingFilter.java:54)
at $WebRequestServicerFilter_113b6c26707.service($WebRequestServicerFilter_113b6c26707.java)
at $WebRequestServicer_113b6c26709.service($WebRequestServicer_113b6c26709.java)
at $WebRequestServicer_113b6c26701.service($WebRequestServicer_113b6c26701.java)
at org.apache.tapestry.services.impl.WebRequestServicerPipelineBridge.service(WebRequestServicerPipelineBridge.java:61)
at $ServletRequestServicer_113b6c266e2.service($ServletRequestServicer_113b6c266e2.java)
at org.apache.tapestry.request.DecodedRequestInjector.service(DecodedRequestInjector.java:55)
at $ServletRequestServicerFilter_113b6c266de.service($ServletRequestServicerFilter_113b6c266de.java)
at $ServletRequestServicer_113b6c266e4.service($ServletRequestServicer_113b6c266e4.java)
at collective.ui.custom.HibernateFilter.service(HibernateFilter.java:40)
at $ServletRequestServicerFilter_113b6c266dc.service($ServletRequestServicerFilter_113b6c266dc.java)
at $ServletRequestServicer_113b6c266e4.service($ServletRequestServicer_113b6c266e4.java)
at collective.ui.custom.LuceneIndexFilter.service(LuceneIndexFilter.java:24)
at $ServletRequestServicerFilter_113b6c266da.service($ServletRequestServicerFilter_113b6c266da.java)
at $ServletRequestServicer_113b6c266e4.service($ServletRequestServicer_113b6c266e4.java)
at org.apache.tapestry.multipart.MultipartDecoderFilter.service(MultipartDecoderFilter.java:52)
at $ServletRequestServicerFilter_113b6c266d8.service($ServletRequestServicerFilter_113b6c266d8.java)
at $ServletRequestServicer_113b6c266e4.service($ServletRequestServicer_113b6c266e4.java)
at org.apache.tapestry.services.impl.SetupRequestEncoding.service(SetupRequestEncoding.java:53)
at $ServletRequestServicerFilter_113b6c266e0.service($ServletRequestServicerFilter_113b6c266e0.java)
at $ServletRequestServicer_113b6c266e4.service($ServletRequestServicer_113b6c266e4.java)
at $ServletRequestServicer_113b6c266d2.service($ServletRequestServicer_113b6c266d2.java)
at org.apache.tapestry.ApplicationServlet.doService(ApplicationServlet.java:126)
at collective.ui.CollectiveApplicationServlet.doService(CollectiveApplicationServlet.java:69)
at org.apache.tapestry.ApplicationServlet.doGet(ApplicationServlet.java:103)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:596)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:689)
at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:428)
at org.mortbay.jetty.servlet.WebApplicationHandler$CachedChain.doFilter(WebApplicationHandler.java:830)
at collective.servlet.ResponseHeaderFilter.doFilter(ResponseHeaderFilter.java:32)
at org.mortbay.jetty.servlet.WebApplicationHandler$CachedChain.doFilter(WebApplicationHandler.java:821)
at org.mortbay.jetty.servlet.WebApplicationHandler.dispatch(WebApplicationHandler.java:471)
at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:568)
at org.mortbay.http.HttpContext.handle(HttpContext.java:1530)
at org.mortbay.jetty.servlet.WebApplicationContext.handle(WebApplicationContext.java:633)
at org.mortbay.http.HttpContext.handle(HttpContext.java:1482)
at org.mortbay.http.HttpServer.service(HttpServer.java:909)
at org.mortbay.http.HttpConnection.service(HttpConnection.java:820)
at org.mortbay.http.HttpConnection.handleNext(HttpConnection.java:986)
at org.mortbay.http.HttpConnection.handle(HttpConnection.java:837)
at org.mortbay.http.SocketListener.handleConnection(SocketListener.java:245)
at org.mortbay.util.ThreadedServer.handle(ThreadedServer.java:357)
at org.mortbay.util.ThreadPool$PoolThread.run(ThreadPool.java:534)

at org.apache.tapestry.services.impl.ExpressionCacheImpl.parse(ExpressionCacheImpl.java:152)
at org.apache.tapestry.services.impl.ExpressionCacheImpl.getCompiledExpression(ExpressionCacheImpl.java:115)
at $ExpressionCache_113b6c26808.getCompiledExpression($ExpressionCache_113b6c26808.java)
at org.apache.tapestry.binding.ExpressionBinding.resolveExpression(ExpressionBinding.java:134)
at org.apache.tapestry.binding.ExpressionBinding.getObject(ExpressionBinding.java:125)
at org.apache.tapestry.binding.AbstractBinding.getObject(AbstractBinding.java:84)
at org.apache.tapestry.enhance.EnhanceUtils.toBoolean(EnhanceUtils.java:173)
at $IfBean_112.getCondition($IfBean_112.java)
at org.apache.tapestry.components.IfBean.evaluateCondition(IfBean.java:128)
at org.apache.tapestry.components.IfBean.renderComponent(IfBean.java:66)
at org.apache.tapestry.AbstractComponent.render(AbstractComponent.java:725)
at org.apache.tapestry.services.impl.DefaultResponseBuilder.render(DefaultResponseBuilder.java:180)
at org.apache.tapestry.BaseComponent.renderComponent(BaseComponent.java:107)
at org.apache.tapestry.AbstractComponent.render(AbstractComponent.java:725)
at org.apache.tapestry.services.impl.DefaultResponseBuilder.render(DefaultResponseBuilder.java:178)
at org.apache.tapestry.AbstractPage.renderPage(AbstractPage.java:249)
at org.apache.tapestry.engine.RequestCycle.renderPage(RequestCycle.java:397)
at org.apache.tapestry.services.impl.DefaultResponseBuilder.renderResponse(DefaultResponseBuilder.java:152)
at org.apache.tapestry.services.impl.ResponseRendererImpl.renderResponse(ResponseRendererImpl.java:33)
at $ResponseRenderer_113b6c26698.renderResponse($ResponseRenderer_113b6c26698.java)
at org.apache.tapestry.engine.PageService.service(PageService.java:68)
at $IEngineService_113b6c2672a.service($IEngineService_113b6c2672a.java)
at org.apache.tapestry.services.impl.EngineServiceOuterProxy.service(EngineServiceOuterProxy.java:72)
at org.apache.tapestry.engine.AbstractEngine.service(AbstractEngine.java:237)
at org.apache.tapestry.services.impl.InvokeEngineTerminator.service(InvokeEngineTerminator.java:54)
at $WebRequestServicer_113b6c26705.service($WebRequestServicer_113b6c26705.java)
at org.apache.tapestry.services.impl.DisableCachingFilter.service(DisableCachingFilter.java:54)
at $WebRequestServicerFilter_113b6c26707.service($WebRequestServicerFilter_113b6c26707.java)
at $WebRequestServicer_113b6c26709.service($WebRequestServicer_113b6c26709.java)
at $WebRequestServicer_113b6c26701.service($WebRequestServicer_113b6c26701.java)
at org.apache.tapestry.services.impl.WebRequestServicerPipelineBridge.service(WebRequestServicerPipelineBridge.java:61)
at $ServletRequestServicer_113b6c266e2.service($ServletRequestServicer_113b6c266e2.java)
at org.apache.tapestry.request.DecodedRequestInjector.service(DecodedRequestInjector.java:55)
at $ServletRequestServicerFilter_113b6c266de.service($ServletRequestServicerFilter_113b6c266de.java)
at $ServletRequestServicer_113b6c266e4.service($ServletRequestServicer_113b6c266e4.java)
at collective.ui.custom.HibernateFilter.service(HibernateFilter.java:40)
at $ServletRequestServicerFilter_113b6c266dc.service($ServletRequestServicerFilter_113b6c266dc.java)
at $ServletRequestServicer_113b6c266e4.service($ServletRequestServicer_113b6c266e4.java)
at collective.ui.custom.LuceneIndexFilter.service(LuceneIndexFilter.java:24)
at $ServletRequestServicerFilter_113b6c266da.service($ServletRequestServicerFilter_113b6c266da.java)
at $ServletRequestServicer_113b6c266e4.service($ServletRequestServicer_113b6c266e4.java)
at org.apache.tapestry.multipart.MultipartDecoderFilter.service(MultipartDecoderFilter.java:52)
at $ServletRequestServicerFilter_113b6c266d8.service($ServletRequestServicerFilter_113b6c266d8.java)
at $ServletRequestServicer_113b6c266e4.service($ServletRequestServicer_113b6c266e4.java)
at org.apache.tapestry.services.impl.SetupRequestEncoding.service(SetupRequestEncoding.java:53)
at $ServletRequestServicerFilter_113b6c266e0.service($ServletRequestServicerFilter_113b6c266e0.java)
at $ServletRequestServicer_113b6c266e4.service($ServletRequestServicer_113b6c266e4.java)
at $ServletRequestServicer_113b6c266d2.service($ServletRequestServicer_113b6c266d2.java)
at org.apache.tapestry.ApplicationServlet.doService(ApplicationServlet.java:126)
at collective.ui.CollectiveApplicationServlet.doService(CollectiveApplicationServlet.java:69)
at org.apache.tapestry.ApplicationServlet.doGet(ApplicationServlet.java:103)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:596)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:689)
at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:428)
at org.mortbay.jetty.servlet.WebApplicationHandler$CachedChain.doFilter(WebApplicationHandler.java:830)
at collective.servlet.ResponseHeaderFilter.doFilter(ResponseHeaderFilter.java:32)
at org.mortbay.jetty.servlet.WebApplicationHandler$CachedChain.doFilter(WebApplicationHandler.java:821)
at org.mortbay.jetty.servlet.WebApplicationHandler.dispatch(WebApplicationHandler.java:471)
at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:568)
at org.mortbay.http.HttpContext.handle(HttpContext.java:1530)
at org.mortbay.jetty.servlet.WebApplicationContext.handle(WebApplicationContext.java:633)
at org.mortbay.http.HttpContext.handle(HttpContext.java:1482)
at org.mortbay.http.HttpServer.service(HttpServer.java:909)
at org.mortbay.http.HttpConnection.service(HttpConnection.java:820)
at org.mortbay.http.HttpConnection.handleNext(HttpConnection.java:986)
at org.mortbay.http.HttpConnection.handle(HttpConnection.java:837)
at org.mortbay.http.SocketListener.handleConnection(SocketListener.java:245)
at org.mortbay.util.ThreadedServer.handle(ThreadedServer.java:357)
at org.mortbay.util.ThreadPool$PoolThread.run(ThreadPool.java:534)