RestoreDeletedPageIT#restore is flickering

08:41:28.348 [Exec Stream Pumper] INFO  o.x.t.i.XWikiLogOutputStream - Caused by: java.lang.ArrayIndexOutOfBoundsException: null
08:41:28.348 [Exec Stream Pumper] INFO  o.x.t.i.XWikiLogOutputStream - 	at java.lang.reflect.Array.get(Native Method)
08:41:28.348 [Exec Stream Pumper] INFO  o.x.t.i.XWikiLogOutputStream - 	at org.apache.velocity.util.ArrayListWrapper.get(ArrayListWrapper.java:43)
08:41:28.348 [Exec Stream Pumper] INFO  o.x.t.i.XWikiLogOutputStream - 	at sun.reflect.GeneratedMethodAccessor400.invoke(Unknown Source)

Stacktrace

org.openqa.selenium.TimeoutException: 
Expected condition failed: waiting for org.xwiki.test.ui.XWikiWebDriver$1@1393dd72 (tried for 10 second(s) with 500 milliseconds interval)
Build info: version: '3.141.59', revision: 'e82be7d358', time: '2018-11-14T08:17:03'
System info: host: 'fe15453a4089', ip: '172.17.0.3', os.name: 'Linux', os.arch: 'amd64', os.version: '4.9.130-xxxx-std-ipv6-64', java.version: '1.8.0_222'
Driver info: org.xwiki.test.ui.XWikiWebDriver
Capabilities {acceptInsecureCerts: true, browserName: firefox, browserVersion: 69.0.3, javascriptEnabled: true, moz:accessibilityChecks: false, moz:buildID: 20191009172106, moz:geckodriverVersion: 0.26.0, moz:headless: false, moz:processID: 25414, moz:profile: /tmp/rust_mozprofilepT2SST, moz:shutdownTimeout: 60000, moz:useNonSpecCompliantPointerOrigin: false, moz:webdriverClick: true, pageLoadStrategy: normal, platform: LINUX, platformName: LINUX, platformVersion: 4.9.130-xxxx-std-ipv6-64, rotatable: false, setWindowRect: true, strictFileInteractability: false, timeouts: {implicit: 0, pageLoad: 300000, script: 30000}, unhandledPromptBehavior: dismiss and notify}
Session ID: 9c69379e-ec21-4055-afdf-c1939f100699
	at org.openqa.selenium.support.ui.WebDriverWait.timeoutException(WebDriverWait.java:95)
	at org.openqa.selenium.support.ui.FluentWait.until(FluentWait.java:272)
	at sun.reflect.GeneratedMethodAccessor7.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.xwiki.test.ui.XWikiWebDriver.waitUntilCondition(XWikiWebDriver.java:226)
	at org.xwiki.test.ui.XWikiWebDriver.waitUntilJavascriptCondition(XWikiWebDriver.java:626)
	at org.xwiki.test.ui.po.BasePage.waitUntilPageJSIsLoaded(BasePage.java:588)
	at org.xwiki.test.ui.po.BasePage.<init>(BasePage.java:121)
	at org.xwiki.test.ui.po.CopyOrRenameOrDeleteStatusPage.<init>(CopyOrRenameOrDeleteStatusPage.java:34)
	at org.xwiki.test.ui.po.DeletingPage.<init>(DeletingPage.java:32)
	at org.xwiki.flamingo.test.ui.RestoreDeletedPageTest.restore(RestoreDeletedPageTest.java:63)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
	at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
	at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
	at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
	at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
	at org.xwiki.test.ui.AuthenticationRule$1.evaluate(AuthenticationRule.java:73)
	at org.xwiki.test.ui.browser.BrowserTestRule$1.evaluate(BrowserTestRule.java:104)
	at org.junit.rules.TestWatcher$1.evaluate(TestWatcher.java:55)
	at org.junit.rules.TestWatcher$1.evaluate(TestWatcher.java:55)
	at org.junit.rules.RunRules.evaluate(RunRules.java:20)
	at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
	at com.google.code.tempusfugit.concurrency.IntermittentTestRunner.runChild(IntermittentTestRunner.java:36)
	at com.google.code.tempusfugit.concurrency.IntermittentTestRunner.runChild(IntermittentTestRunner.java:25)
	at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
	at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
	at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
	at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
	at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
	at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
	at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27)
	at org.xwiki.test.integration.junit4.ValidateConsoleRule$ValidateConsoleStatement.evaluate(ValidateConsoleRule.java:73)
	at org.junit.rules.RunRules.evaluate(RunRules.java:20)
	at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
	at org.junit.runners.Suite.runChild(Suite.java:128)
	at org.junit.runners.Suite.runChild(Suite.java:27)
	at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
	at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
	at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
	at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
	at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
	at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
	at org.junit.extensions.cpsuite.ClasspathSuite.run(ClasspathSuite.java:194)
	at org.xwiki.test.integration.XWikiExecutorSuite.run(XWikiExecutorSuite.java:195)
	at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
	at org.junit.runner.JUnitCore.run(JUnitCore.java:115)
	at org.junit.vintage.engine.execution.RunnerExecutor.execute(RunnerExecutor.java:40)
	at java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183)
	at java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:193)
	at java.util.Iterator.forEachRemaining(Iterator.java:116)
	at java.util.Spliterators$IteratorSpliterator.forEachRemaining(Spliterators.java:1801)
	at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:482)
	at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:472)
	at java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150)
	at java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173)
	at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
	at java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:485)
	at org.junit.vintage.engine.VintageTestEngine.executeAllChildren(VintageTestEngine.java:80)
	at org.junit.vintage.engine.VintageTestEngine.execute(VintageTestEngine.java:71)
	at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:229)
	at org.junit.platform.launcher.core.DefaultLauncher.lambda$execute$6(DefaultLauncher.java:197)
	at org.junit.platform.launcher.core.DefaultLauncher.withInterceptedStreams(DefaultLauncher.java:211)
	at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:191)
	at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:128)
	at org.apache.maven.surefire.junitplatform.JUnitPlatformProvider.invokeAllTests(JUnitPlatformProvider.java:150)
	at org.apache.maven.surefire.junitplatform.JUnitPlatformProvider.invoke(JUnitPlatformProvider.java:124)
	at org.apache.maven.surefire.booter.ForkedBooter.invokeProviderInSameClassLoader(ForkedBooter.java:384)
	at org.apache.maven.surefire.booter.ForkedBooter.runSuitesInProcess(ForkedBooter.java:345)
	at org.apache.maven.surefire.booter.ForkedBooter.execute(ForkedBooter.java:126)
	at org.apache.maven.surefire.booter.ForkedBooter.main(ForkedBooter.java:418)

Standard Error

08:41:25.442 [main] INFO  org.xwiki.test.ui.TestDebugger - RestoreDeletedPageTest-restore started
08:41:28.320 [Exec Stream Pumper] INFO  o.x.t.i.XWikiLogOutputStream - 2019-10-22 08:41:28,320 [http://localhost:8080/xwiki/bin/view/RestoreDeletedPageTest/restore?xpage=delete&jobId=refactoring/delete/1571733688263-711] ERROR o.x.v.i.DefaultVelocityEngine  - Exception in macro #printLogMessage called at 21:/skins/flamingo/delete.vm[line 21, column 9] 
08:41:28.324 [Exec Stream Pumper] INFO  o.x.t.i.XWikiLogOutputStream - 2019-10-22 08:41:28,320 [http://localhost:8080/xwiki/bin/view/RestoreDeletedPageTest/restore?xpage=delete&jobId=refactoring/delete/1571733688263-711] ERROR o.x.v.i.DefaultVelocityEngine  - Exception in macro #displayJobProgressBar called at 21:/skins/flamingo/delete.vm[line 86, column 5] 
08:41:28.324 [Exec Stream Pumper] INFO  o.x.t.i.XWikiLogOutputStream - 2019-10-22 08:41:28,320 [http://localhost:8080/xwiki/bin/view/RestoreDeletedPageTest/restore?xpage=delete&jobId=refactoring/delete/1571733688263-711] ERROR o.x.v.i.DefaultVelocityEngine  - Exception in macro #displayDeleteJobStatus called at 21:/skins/flamingo/delete.vm[line 44, column 25] 
08:41:28.324 [Exec Stream Pumper] INFO  o.x.t.i.XWikiLogOutputStream - 2019-10-22 08:41:28,321 [http://localhost:8080/xwiki/bin/view/RestoreDeletedPageTest/restore?xpage=delete&jobId=refactoring/delete/1571733688263-711] ERROR o.x.v.i.DefaultVelocityEngine  - Exception in macro #controller called at 21:/skins/flamingo/delete.vm[line 18, column 1] 
08:41:28.329 [Exec Stream Pumper] INFO  o.x.t.i.XWikiLogOutputStream - 2019-10-22 08:41:28,328 [http://localhost:8080/xwiki/bin/view/RestoreDeletedPageTest/restore?xpage=delete&jobId=refactoring/delete/1571733688263-711] ERROR c.x.x.XWiki                    - Error while evaluating velocity template [delete.vm] 
08:41:28.329 [Exec Stream Pumper] INFO  o.x.t.i.XWikiLogOutputStream - org.xwiki.rendering.RenderingException: Failed to execute renderer
[...]
08:41:28.348 [Exec Stream Pumper] INFO  o.x.t.i.XWikiLogOutputStream - Caused by: java.lang.ArrayIndexOutOfBoundsException: null
08:41:28.348 [Exec Stream Pumper] INFO  o.x.t.i.XWikiLogOutputStream - 	at java.lang.reflect.Array.get(Native Method)
08:41:28.348 [Exec Stream Pumper] INFO  o.x.t.i.XWikiLogOutputStream - 	at org.apache.velocity.util.ArrayListWrapper.get(ArrayListWrapper.java:43)
08:41:28.348 [Exec Stream Pumper] INFO  o.x.t.i.XWikiLogOutputStream - 	at sun.reflect.GeneratedMethodAccessor400.invoke(Unknown Source)
08:41:28.349 [Exec Stream Pumper] INFO  o.x.t.i.XWikiLogOutputStream - 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
08:41:28.349 [Exec Stream Pumper] INFO  o.x.t.i.XWikiLogOutputStream - 	at java.lang.reflect.Method.invoke(Method.java:498)
08:41:28.349 [Exec Stream Pumper] INFO  o.x.t.i.XWikiLogOutputStream - 	at org.apache.velocity.util.introspection.UberspectImpl$VelMethodImpl.doInvoke(UberspectImpl.java:395)
08:41:28.349 [Exec Stream Pumper] INFO  o.x.t.i.XWikiLogOutputStream - 	at org.apache.velocity.util.introspection.UberspectImpl$VelMethodImpl.invoke(UberspectImpl.java:384)
08:41:28.349 [Exec Stream Pumper] INFO  o.x.t.i.XWikiLogOutputStream - 	at org.apache.velocity.runtime.parser.node.ASTMethod.execute(ASTMethod.java:173)
08:41:28.349 [Exec Stream Pumper] INFO  o.x.t.i.XWikiLogOutputStream - 	... 119 common frames omitted
08:41:38.650 [main] INFO  org.xwiki.test.ui.TestDebugger - RestoreDeletedPageTest-restore failed
08:41:38.843 [main] INFO  org.xwiki.test.ui.TestDebugger - Screenshot for failing test [RestoreDeletedPageTest-restore] saved at [/root/workspace/XWiki_xwiki-platform_master/xwiki-platform-core/xwiki-platform-flamingo/xwiki-platform-flamingo-skin/xwiki-platform-flamingo-skin-test/xwiki-platform-flamingo-skin-test-tests/target/screenshots/RestoreDeletedPageTest-restore.png].
08:41:38.846 [main] INFO  org.xwiki.test.ui.TestDebugger - Current page URL is [http://localhost:8080/xwiki/bin/view/RestoreDeletedPageTest/restore?xpage=delete&jobId=refactoring/delete/1571733688263-711]
08:41:38.855 [main] INFO  org.xwiki.test.ui.TestDebugger - Current page source is [<html><head></head><body><div class="xwikirenderingerror" title="Read technical information related to this error" style="cursor: pointer;">Error number 4001 in 4: Error while evaluating velocity template delete.vm</div><div class="xwikirenderingerrordescription hidden"><pre>Error number 4001 in 4: Error while evaluating velocity template delete.vm
com.xpn.xwiki.XWikiException: Error number 4001 in 4: Error while evaluating velocity template delete.vm
	at com.xpn.xwiki.XWiki.evaluateTemplate(XWiki.java:2485)
	at com.xpn.xwiki.web.Utils.parseTemplate(Utils.java:179)
	at com.xpn.xwiki.web.XWikiAction.execute(XWikiAction.java:516)
	at com.xpn.xwiki.web.XWikiAction.execute(XWikiAction.java:218)
	at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:425)
	at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:228)
	at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1913)
	at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:449)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:687)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:790)
	at org.eclipse.jetty.servlet.ServletHolder$NotAsyncServlet.service(ServletHolder.java:1400)
	at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:760)
	at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1617)
	at com.xpn.xwiki.web.ActionFilter.doFilter(ActionFilter.java:112)
	at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1604)
	at org.xwiki.wysiwyg.filter.ConversionFilter.doFilter(ConversionFilter.java:109)
	at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1604)
	at org.xwiki.container.servlet.filters.internal.SetHTTPHeaderFilter.doFilter(SetHTTPHeaderFilter.java:63)
	at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1604)
	at org.xwiki.container.servlet.filters.internal.SavedRequestRestorerFilter.doFilter(SavedRequestRestorerFilter.java:208)
	at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1604)
	at org.xwiki.container.servlet.filters.internal.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:111)
	at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1604)
	at org.xwiki.resource.servlet.RoutingFilter.doFilter(RoutingFilter.java:132)
	at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1596)
	at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:545)
	at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:143)
	at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:536)
	at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:127)
	at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:235)
	at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:1589)
	at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:233)
	at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1296)
	at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:188)
	at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:485)
	at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:1559)
	at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:186)
	at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1211)
	at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)
	at org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:221)
	at org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:146)
	at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:127)
	at org.eclipse.jetty.server.Server.handle(Server.java:500)
	at org.eclipse.jetty.server.HttpChannel.lambda$handle$1(HttpChannel.java:386)
	at org.eclipse.jetty.server.HttpChannel.dispatch(HttpChannel.java:560)
	at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:378)
	at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:268)
	at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:311)
	at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:103)
	at org.eclipse.jetty.io.ChannelEndPoint$2.run(ChannelEndPoint.java:117)
	at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.runTask(EatWhatYouKill.java:336)
	at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.doProduce(EatWhatYouKill.java:313)
	at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.tryProduce(EatWhatYouKill.java:171)
	at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.run(EatWhatYouKill.java:129)
	at org.eclipse.jetty.util.thread.ReservedThreadExecutor$ReservedThread.run(ReservedThreadExecutor.java:367)
	at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:782)
	at org.eclipse.jetty.util.thread.QueuedThreadPool$Runner.run(QueuedThreadPool.java:914)
	at java.lang.Thread.run(Thread.java:748)
Caused by: org.xwiki.rendering.RenderingException: Failed to execute renderer
	at org.xwiki.rendering.async.internal.DefaultAsyncRendererExecutor.syncRender(DefaultAsyncRendererExecutor.java:267)
	at org.xwiki.rendering.async.internal.DefaultAsyncRendererExecutor.render(DefaultAsyncRendererExecutor.java:247)
	at org.xwiki.rendering.async.internal.block.DefaultBlockAsyncRendererExecutor.render(DefaultBlockAsyncRendererExecutor.java:154)
	at com.xpn.xwiki.internal.template.InternalTemplateManager.render(InternalTemplateManager.java:772)
	at com.xpn.xwiki.internal.template.InternalTemplateManager.renderFromSkin(InternalTemplateManager.java:745)
	at com.xpn.xwiki.internal.template.InternalTemplateManager.renderFromSkin(InternalTemplateManager.java:725)
	at com.xpn.xwiki.internal.template.InternalTemplateManager.render(InternalTemplateManager.java:711)
	at com.xpn.xwiki.internal.template.DefaultTemplateManager.render(DefaultTemplateManager.java:78)
	at com.xpn.xwiki.XWiki.evaluateTemplate(XWiki.java:2480)
	... 57 more
Caused by: org.xwiki.rendering.RenderingException: Failed to evaluate template
	at com.xpn.xwiki.internal.template.TemplateAsyncRenderer.evaluateContent(TemplateAsyncRenderer.java:220)
	at com.xpn.xwiki.internal.template.TemplateAsyncRenderer.renderVelocity(TemplateAsyncRenderer.java:181)
	at com.xpn.xwiki.internal.template.TemplateAsyncRenderer.render(TemplateAsyncRenderer.java:137)
	at com.xpn.xwiki.internal.template.TemplateAsyncRenderer.render(TemplateAsyncRenderer.java:53)
	at org.xwiki.rendering.async.internal.DefaultAsyncRendererExecutor.lambda$syncRender$0(DefaultAsyncRendererExecutor.java:264)
	at com.xpn.xwiki.internal.security.authorization.DefaultAuthorExecutor.call(DefaultAuthorExecutor.java:98)
	at org.xwiki.rendering.async.internal.DefaultAsyncRendererExecutor.syncRender(DefaultAsyncRendererExecutor.java:264)
	... 65 more
Caused by: org.xwiki.velocity.XWikiVelocityException: Failed to evaluate content with id [/skins/flamingo/delete.vm]
	at org.xwiki.velocity.internal.DefaultVelocityEngine.evaluate(DefaultVelocityEngine.java:227)
	at com.xpn.xwiki.render.DefaultVelocityManager.evaluate(DefaultVelocityManager.java:358)
	at com.xpn.xwiki.internal.template.VelocityTemplateEvaluator.evaluateContent(VelocityTemplateEvaluator.java:95)
	at com.xpn.xwiki.internal.template.TemplateAsyncRenderer.evaluateContent(TemplateAsyncRenderer.java:218)
	... 71 more
Caused by: org.apache.velocity.exception.MethodInvocationException: Invocation of method 'get' in  class [Ljava.lang.Object; threw exception java.lang.ArrayIndexOutOfBoundsException at 21:/skins/flamingo/delete.vm[line 60, column 44]
	at org.apache.velocity.runtime.parser.node.ASTMethod.handleInvocationException(ASTMethod.java:243)
	at org.apache.velocity.runtime.parser.node.ASTMethod.execute(ASTMethod.java:187)
	at org.apache.velocity.runtime.parser.node.ASTReference.execute(ASTReference.java:280)
	at org.apache.velocity.runtime.parser.node.ASTReference.value(ASTReference.java:567)
	at org.apache.velocity.runtime.parser.node.ASTExpression.value(ASTExpression.java:71)
	at org.apache.velocity.runtime.parser.node.ASTSetDirective.render(ASTSetDirective.java:142)
	at org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:72)
	at org.apache.velocity.runtime.parser.node.ASTIfStatement.render(ASTIfStatement.java:87)
	at org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:72)
	at org.apache.velocity.runtime.directive.Foreach.render(Foreach.java:420)
	at org.apache.velocity.runtime.parser.node.ASTDirective.render(ASTDirective.java:207)
	at org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:72)
	at org.apache.velocity.runtime.directive.VelocimacroProxy.render(VelocimacroProxy.java:216)
	at org.apache.velocity.runtime.directive.RuntimeMacro.render(RuntimeMacro.java:311)
	at org.apache.velocity.runtime.directive.RuntimeMacro.render(RuntimeMacro.java:230)
	at org.apache.velocity.runtime.parser.node.ASTDirective.render(ASTDirective.java:207)
	at org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:72)
	at org.apache.velocity.runtime.parser.node.ASTIfStatement.render(ASTIfStatement.java:87)
	at org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:72)
	at org.apache.velocity.runtime.directive.VelocimacroProxy.render(VelocimacroProxy.java:216)
	at org.apache.velocity.runtime.directive.RuntimeMacro.render(RuntimeMacro.java:311)
	at org.apache.velocity.runtime.directive.RuntimeMacro.render(RuntimeMacro.java:230)
	at org.apache.velocity.runtime.parser.node.ASTDirective.render(ASTDirective.java:207)
	at org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:72)
	at org.apache.velocity.runtime.parser.node.ASTIfStatement.render(ASTIfStatement.java:87)
	at org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:72)
	at org.apache.velocity.runtime.directive.VelocimacroProxy.render(VelocimacroProxy.java:216)
	at org.apache.velocity.runtime.directive.RuntimeMacro.render(RuntimeMacro.java:311)
	at org.apache.velocity.runtime.directive.RuntimeMacro.render(RuntimeMacro.java:230)
	at org.apache.velocity.runtime.parser.node.ASTDirective.render(ASTDirective.java:207)
	at org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode.java:342)
	at org.apache.velocity.runtime.parser.node.ASTStringLiteral.value(ASTStringLiteral.java:330)
	at org.apache.velocity.runtime.parser.node.ASTExpression.value(ASTExpression.java:71)
	at org.apache.velocity.runtime.parser.node.ASTSetDirective.render(ASTSetDirective.java:142)
	at org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:72)
	at org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode.java:342)
	at org.apache.velocity.runtime.parser.node.ASTIfStatement.render(ASTIfStatement.java:106)
	at org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:72)
	at org.apache.velocity.runtime.parser.node.ASTIfStatement.render(ASTIfStatement.java:87)
	at org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:72)
	at org.apache.velocity.runtime.directive.VelocimacroProxy.render(VelocimacroProxy.java:216)
	at org.apache.velocity.runtime.directive.RuntimeMacro.render(RuntimeMacro.java:311)
	at org.apache.velocity.runtime.directive.RuntimeMacro.render(RuntimeMacro.java:230)
	at org.apache.velocity.runtime.parser.node.ASTDirective.render(ASTDirective.java:207)
	at org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode.java:342)
	at org.xwiki.velocity.internal.DefaultVelocityEngine.evaluateInternal(DefaultVelocityEngine.java:259)
	at org.xwiki.velocity.internal.DefaultVelocityEngine.evaluate(DefaultVelocityEngine.java:222)
	... 74 more
Caused by: java.lang.ArrayIndexOutOfBoundsException
	at java.lang.reflect.Array.get(Native Method)
	at org.apache.velocity.util.ArrayListWrapper.get(ArrayListWrapper.java:43)
	at sun.reflect.GeneratedMethodAccessor400.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.apache.velocity.util.introspection.UberspectImpl$VelMethodImpl.doInvoke(UberspectImpl.java:395)
	at org.apache.velocity.util.introspection.UberspectImpl$VelMethodImpl.invoke(UberspectImpl.java:384)
	at org.apache.velocity.runtime.parser.node.ASTMethod.execute(ASTMethod.java:173)
	... 119 more

</pre></div></body></html>]