Changing the rendered attribute on an ace:row with a group condition causes a NullPointerException. This doesn't occur when using interval or predicate conditions.

SEVERE: java.lang.NullPointerException
at org.icefaces.ace.component.row.Row$GroupPredicate.evaluate(Row.java:104)
at org.icefaces.ace.component.row.Row.evaluateCondition(Row.java:70)
at org.icefaces.ace.component.datatable.DataTable.getConditionalRows(DataTable.java:1087)
at org.icefaces.ace.component.datatable.DataTableRowRenderer.encodeRow(DataTableRowRenderer.java:62)
at org.icefaces.ace.component.datatable.DataTableRenderer.encodeTableBody(DataTableRenderer.java:293)
at org.icefaces.ace.component.datatable.DataTableRenderer.encodeTable(DataTableRenderer.java:243)
at org.icefaces.ace.component.datatable.DataTableRenderer.encodeEntirety(DataTableRenderer.java:170)
at org.icefaces.ace.component.datatable.DataTableRenderer.encodeEnd(DataTableRenderer.java:120)
at javax.faces.component.UIComponentBase.encodeEnd(UIComponentBase.java:877)
at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1826)
at javax.faces.render.Renderer.encodeChildren(Renderer.java:168)
at org.icefaces.impl.renderkit.RendererWrapper.encodeChildren(RendererWrapper.java:49)
at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:847)
at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1819)
at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1822)
at org.icefaces.impl.context.DOMPartialViewContext.processPartial(DOMPartialViewContext.java:150)
at javax.faces.component.UIViewRoot.encodeChildren(UIViewRoot.java:973)
at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1819)
at com.sun.faces.application.view.FaceletViewHandlingStrategy.renderView(FaceletViewHandlingStrategy.java:421)
at com.sun.faces.application.view.MultiViewHandler.renderView(MultiViewHandler.java:125)
at javax.faces.application.ViewHandlerWrapper.renderView(ViewHandlerWrapper.java:286)
at com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:120)
at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101)
at com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:139)
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:594)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:953)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1023)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589)
at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.run(AprEndpoint.java:1852)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
at java.lang.Thread.run(Thread.java:722)


To reproduce:
1) Deploy test app located at: http://server.ice:8888/svn/repo/qa/trunk/Regression-Icefaces2/Sparkle/Nightly/dataTable
2) Navigate to 'Conditional Row Test'
3) Click one of the checkboxes that are marked 'Group' to render the row (exception will occur).
The exception occurs each time the rendered value is change regardless if it is true or false, but only occurs when using a binding on the dataTable.