An NPE occurs when facelet= true in an ace:panelStack when using myfaces libs. QA test app located at:
http://dev.icesoft.com/svn/repo/qa/trunk/Regression-Icefaces4/Sparkle/Nightly/panelStack
To reproduce:
1.) Build the test app with -Dmyfaces=true, navigate to the DataTable demo (/dataTable.jsf)
2.) Set the facelet to true
3.) Note that the bottom panelStack is removed from the table
4.) Use the drop down to select Employee Info
5.) NPE occurs
Note** this is not a specific ace:panelStack inside ace:dataTable issue. This can also be reproduced by adding the facelet="true" attribute to the ace:stackPane in the basic Overview demo.
Stack trace:
java.lang.NullPointerException
        at org.apache.myfaces.view.facelets.impl.FaceletCompositionContextImpl.i
ncrementUniqueId(FaceletCompositionContextImpl.java:1036)
        at org.apache.myfaces.view.facelets.impl.DefaultFaceletContext.generateU
niqueId(DefaultFaceletContext.java:345)
        at org.apache.myfaces.view.facelets.tag.jsf.ComponentTagHandlerDelegate.
apply(ComponentTagHandlerDelegate.java:218)
        at javax.faces.view.facelets.DelegatingMetaTagHandler.apply(DelegatingMe
taTagHandler.java:50)
        at javax.faces.view.facelets.DelegatingMetaTagHandler.applyNextHandler(D
elegatingMetaTagHandler.java:55)
        at org.icefaces.ace.component.stackpane.StackPaneHandler.access$001(Stac
kPaneHandler.java:25)
        at org.icefaces.ace.component.stackpane.StackPaneHandler$2.run(StackPane
Handler.java:50)
        at org.icefaces.ace.component.stackpane.StackPane.createChildren(StackPa
ne.java:121)
        at org.icefaces.ace.component.stackpane.StackPaneRenderer.encodeChildren
(StackPaneRenderer.java:77)
        at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.
java:643)
        at javax.faces.component.UIComponentBase.encodeAll(UIComponentBase.java:
541)
        at javax.faces.component.UIComponentBase.encodeAll(UIComponentBase.java:
550)
        at javax.faces.component.UIComponentBase.encodeAll(UIComponentBase.java:
550)
        at org.apache.myfaces.shared.renderkit.html.HtmlTableRendererBase.render
ColumnBody(HtmlTableRendererBase.java:680)
        at org.apache.myfaces.shared.renderkit.html.HtmlTableRendererBase.encode
ColumnChild(HtmlTableRendererBase.java:639)
        at org.apache.myfaces.shared.renderkit.html.HtmlTableRendererBase.encode
InnerHtml(HtmlTableRendererBase.java:493)
        at org.apache.myfaces.shared.renderkit.html.HtmlTableRendererBase.encode
Children(HtmlTableRendererBase.java:208)
        at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.
java:643)
        at javax.faces.component.UIComponentBase.encodeAll(UIComponentBase.java:
541)
        at javax.faces.component.UIComponentBase.encodeAll(UIComponentBase.java:
550)
        at javax.faces.component.UIComponentBase.encodeAll(UIComponentBase.java:
550)
        at org.icefaces.impl.context.DOMPartialViewContext.processPartial(DOMPar
tialViewContext.java:165)
        at javax.faces.context.PartialViewContextWrapper.processPartial(PartialV
iewContextWrapper.java:85)
        at javax.faces.component.UIViewRoot.encodeChildren(UIViewRoot.java:516)
        at javax.faces.component.UIComponentBase.encodeAll(UIComponentBase.java:
541)
        at org.apache.myfaces.view.facelets.FaceletViewDeclarationLanguage.rende
rView(FaceletViewDeclarationLanguage.java:1891)
        at org.apache.myfaces.application.ViewHandlerImpl.renderView(ViewHandler
Impl.java:313)
        at javax.faces.application.ViewHandlerWrapper.renderView(ViewHandlerWrap
per.java:58)
        at org.apache.myfaces.lifecycle.RenderResponseExecutor.execute(RenderRes
ponseExecutor.java:116)
        at org.apache.myfaces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:
267)
        at javax.faces.webapp.FacesServlet.service(FacesServlet.java:200)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Appl
icationFilterChain.java:305)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationF
ilterChain.java:210)
        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperV
alve.java:222)
        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextV
alve.java:123)
        at org.apache.catalina.authenticator.AuthenticatorBase.invoke(Authentica
torBase.java:502)
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.j
ava:171)
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.j
ava:99)
        at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:
953)
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineVal
ve.java:118)
        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.jav
a:408)
        at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp
11Processor.java:1023)
        at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(
AbstractProtocol.java:589)
        at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoin
t.java:310)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.
java:1145)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor
.java:615)
        at java.lang.Thread.run(Thread.java:745)