Seems to be related to this change http://code-review.gradle.org/changelog/Gradle?cs=0cf83d86da4845e19768e38336d58dec06477df7
Same issue reported earlier here http://forums.gradle.org/gradle/topics/gradle_1_11_fails_with_could_not_create_task_of_type_help
Here is the full stacktrace
org.gradle.api.ProjectConfigurationException: A problem occurred configuring root project
at org.gradle.configuration.project.LifecycleProjectEvaluator.addConfigurationFailure(LifecycleProjectEvaluator.java:79)
at org.gradle.configuration.project.LifecycleProjectEvaluator.evaluate(LifecycleProjectEvaluator.java:57)
at org.gradle.api.internal.project.AbstractProject.evaluate(AbstractProject.java:507)
at org.gradle.api.internal.project.AbstractProject.evaluate(AbstractProject.java:82)
at org.gradle.configuration.DefaultBuildConfigurer.configure(DefaultBuildConfigurer.java:31)
at org.gradle.initialization.DefaultGradleLauncher.doBuildStages(DefaultGradleLauncher.java:142)
at org.gradle.initialization.DefaultGradleLauncher.doBuild(DefaultGradleLauncher.java:113)
at org.gradle.initialization.DefaultGradleLauncher.run(DefaultGradleLauncher.java:81)
at org.gradle.api.tasks.GradleBuild.build(GradleBuild.java:116)
at org.gradle.internal.reflect.JavaMethod.invoke(JavaMethod.java:63)
at org.gradle.api.internal.project.taskfactory.AnnotationProcessingTaskFactory$StandardTaskAction.doExecute(AnnotationProcessingTaskFactory.java:219)
at org.gradle.api.internal.project.taskfactory.AnnotationProcessingTaskFactory$StandardTaskAction.execute(AnnotationProcessingTaskFactory.java:212)
at org.gradle.api.internal.project.taskfactory.AnnotationProcessingTaskFactory$StandardTaskAction.execute(AnnotationProcessingTaskFactory.java:201)
at org.gradle.api.internal.AbstractTask$TaskActionWrapper.execute(AbstractTask.java:533)
at org.gradle.api.internal.AbstractTask$TaskActionWrapper.execute(AbstractTask.java:516)
at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.executeAction(ExecuteActionsTaskExecuter.java:80)
at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.executeActions(ExecuteActionsTaskExecuter.java:61)
at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.execute(ExecuteActionsTaskExecuter.java:46)
at org.gradle.api.internal.tasks.execution.PostExecutionAnalysisTaskExecuter.execute(PostExecutionAnalysisTaskExecuter.java:35)
at org.gradle.api.internal.tasks.execution.SkipUpToDateTaskExecuter.execute(SkipUpToDateTaskExecuter.java:64)
at org.gradle.api.internal.tasks.execution.ValidatingTaskExecuter.execute(ValidatingTaskExecuter.java:58)
at org.gradle.api.internal.tasks.execution.SkipEmptySourceFilesTaskExecuter.execute(SkipEmptySourceFilesTaskExecuter.java:42)
at org.gradle.api.internal.tasks.execution.SkipTaskWithNoActionsExecuter.execute(SkipTaskWithNoActionsExecuter.java:52)
at org.gradle.api.internal.tasks.execution.SkipOnlyIfTaskExecuter.execute(SkipOnlyIfTaskExecuter.java:53)
at org.gradle.api.internal.tasks.execution.ExecuteAtMostOnceTaskExecuter.execute(ExecuteAtMostOnceTaskExecuter.java:43)
at org.gradle.api.internal.AbstractTask.executeWithoutThrowingTaskFailure(AbstractTask.java:289)
at org.gradle.execution.taskgraph.AbstractTaskPlanExecutor$TaskExecutorWorker.executeTask(AbstractTaskPlanExecutor.java:79)
at org.gradle.execution.taskgraph.AbstractTaskPlanExecutor$TaskExecutorWorker.processTask(AbstractTaskPlanExecutor.java:63)
at org.gradle.execution.taskgraph.AbstractTaskPlanExecutor$TaskExecutorWorker.run(AbstractTaskPlanExecutor.java:51)
at org.gradle.execution.taskgraph.DefaultTaskPlanExecutor.process(DefaultTaskPlanExecutor.java:23)
at org.gradle.execution.taskgraph.DefaultTaskGraphExecuter.execute(DefaultTaskGraphExecuter.java:86)
at org.gradle.execution.SelectedTaskExecutionAction.execute(SelectedTaskExecutionAction.java:29)
at org.gradle.execution.DefaultBuildExecuter.execute(DefaultBuildExecuter.java:61)
at org.gradle.execution.DefaultBuildExecuter.access$200(DefaultBuildExecuter.java:23)
at org.gradle.execution.DefaultBuildExecuter$2.proceed(DefaultBuildExecuter.java:67)
at org.gradle.execution.DryRunBuildExecutionAction.execute(DryRunBuildExecutionAction.java:32)
at org.gradle.execution.DefaultBuildExecuter.execute(DefaultBuildExecuter.java:61)
at org.gradle.execution.DefaultBuildExecuter.execute(DefaultBuildExecuter.java:54)
at org.gradle.initialization.DefaultGradleLauncher.doBuildStages(DefaultGradleLauncher.java:166)
at org.gradle.initialization.DefaultGradleLauncher.doBuild(DefaultGradleLauncher.java:113)
at org.gradle.initialization.DefaultGradleLauncher.run(DefaultGradleLauncher.java:81)
at org.gradle.launcher.exec.InProcessBuildActionExecuter$DefaultBuildController.run(InProcessBuildActionExecuter.java:64)
at org.gradle.launcher.cli.ExecuteBuildAction.run(ExecuteBuildAction.java:33)
at org.gradle.launcher.cli.ExecuteBuildAction.run(ExecuteBuildAction.java:24)
at org.gradle.launcher.exec.InProcessBuildActionExecuter.execute(InProcessBuildActionExecuter.java:35)
at org.gradle.launcher.exec.InProcessBuildActionExecuter.execute(InProcessBuildActionExecuter.java:26)
at org.gradle.launcher.cli.RunBuildAction.run(RunBuildAction.java:50)
at org.gradle.internal.Actions$RunnableActionAdapter.execute(Actions.java:171)
at org.gradle.launcher.cli.CommandLineActionFactory$ParseAndBuildAction.execute(CommandLineActionFactory.java:201)
at org.gradle.launcher.cli.CommandLineActionFactory$ParseAndBuildAction.execute(CommandLineActionFactory.java:174)
at org.gradle.launcher.cli.CommandLineActionFactory$WithLogging.execute(CommandLineActionFactory.java:170)
at org.gradle.launcher.cli.CommandLineActionFactory$WithLogging.execute(CommandLineActionFactory.java:139)
at org.gradle.launcher.cli.ExceptionReportingAction.execute(ExceptionReportingAction.java:33)
at org.gradle.launcher.cli.ExceptionReportingAction.execute(ExceptionReportingAction.java:22)
at org.gradle.launcher.Main.doAction(Main.java:46)
at org.gradle.launcher.bootstrap.EntryPoint.run(EntryPoint.java:45)
at org.gradle.launcher.Main.main(Main.java:37)
at org.gradle.launcher.bootstrap.ProcessBootstrap.runNoExit(ProcessBootstrap.java:50)
at org.gradle.launcher.bootstrap.ProcessBootstrap.run(ProcessBootstrap.java:32)
at org.gradle.launcher.GradleMain.main(GradleMain.java:23)
at org.gradle.wrapper.BootstrapMainStarter.start(BootstrapMainStarter.java:33)
at org.gradle.wrapper.WrapperExecutor.execute(WrapperExecutor.java:130)
at org.gradle.wrapper.GradleWrapperMain.main(GradleWrapperMain.java:47) Caused by: org.gradle.api.tasks.TaskInstantiationException: Could not create task of type ‘Help’.
at org.gradle.api.internal.project.taskfactory.TaskFactory$1.call(TaskFactory.java:126)
at org.gradle.api.internal.project.taskfactory.TaskFactory$1.call(TaskFactory.java:121)
at org.gradle.api.internal.AbstractTask.injectIntoNewInstance(AbstractTask.java:148)
at org.gradle.api.internal.project.taskfactory.TaskFactory.createTaskObject(TaskFactory.java:121)
at org.gradle.api.internal.project.taskfactory.TaskFactory.createTask(TaskFactory.java:81)
at org.gradle.api.internal.project.taskfactory.AnnotationProcessingTaskFactory.createTask(AnnotationProcessingTaskFactory.java:99)
at org.gradle.api.internal.project.taskfactory.DependencyAutoWireTaskFactory.createTask(DependencyAutoWireTaskFactory.java:39)
at org.gradle.api.internal.tasks.DefaultTaskContainer.create(DefaultTaskContainer.java:53)
at org.gradle.api.internal.tasks.DefaultTaskContainer.create(DefaultTaskContainer.java:85)
at org.gradle.api.tasks.TaskContainer$create.call(Unknown Source)
at org.gradle.api.plugins.HelpTasksPlugin.apply(HelpTasksPlugin.groovy:31)
at org.gradle.api.plugins.HelpTasksPlugin.apply(HelpTasksPlugin.groovy)
at org.gradle.api.internal.plugins.DefaultPluginContainer.providePlugin(DefaultPluginContainer.java:104)
at org.gradle.api.internal.plugins.DefaultPluginContainer.addPluginInternal(DefaultPluginContainer.java:68)
at org.gradle.api.internal.plugins.DefaultPluginContainer.apply(DefaultPluginContainer.java:34)
at org.gradle.api.plugins.internal.HelpTasksAutoApplyAction.execute(HelpTasksAutoApplyAction.java:24)
at org.gradle.api.plugins.internal.HelpTasksAutoApplyAction.execute(HelpTasksAutoApplyAction.java:22)
at org.gradle.configuration.project.PluginsProjectConfigureActions.execute(PluginsProjectConfigureActions.java:31)
at org.gradle.configuration.project.PluginsProjectConfigureActions.execute(PluginsProjectConfigureActions.java:22)
at org.gradle.configuration.project.ConfigureActionsProjectEvaluator.evaluate(ConfigureActionsProjectEvaluator.java:34)
at org.gradle.configuration.project.LifecycleProjectEvaluator.evaluate(LifecycleProjectEvaluator.java:55)
… 61 more Caused by: org.gradle.internal.service.ServiceCreationException: Could not create service of type TaskArtifactStateRepository using TaskExecutionServices.createTaskArtifactStateRepository().
at org.gradle.internal.service.DefaultServiceRegistry$FactoryMethodService.invokeMethod(DefaultServiceRegistry.java:634)
at org.gradle.internal.service.DefaultServiceRegistry$FactoryService.create(DefaultServiceRegistry.java:588)
at org.gradle.internal.service.DefaultServiceRegistry$ManagedObjectProvider.getInstance(DefaultServiceRegistry.java:430)
at org.gradle.internal.service.DefaultServiceRegistry$SingletonService.get(DefaultServiceRegistry.java:470)
at org.gradle.internal.service.DefaultServiceRegistry$FactoryService.assembleParameters(DefaultServiceRegistry.java:598)
at org.gradle.internal.service.DefaultServiceRegistry$FactoryService.create(DefaultServiceRegistry.java:587)
at org.gradle.internal.service.DefaultServiceRegistry$ManagedObjectProvider.getInstance(DefaultServiceRegistry.java:430)
at org.gradle.internal.service.DefaultServiceRegistry$SingletonService.get(DefaultServiceRegistry.java:470)
at org.gradle.internal.service.DefaultServiceRegistry.doGet(DefaultServiceRegistry.java:291)
at org.gradle.internal.service.DefaultServiceRegistry.get(DefaultServiceRegistry.java:279)
at org.gradle.internal.service.DefaultServiceRegistry$ParentServices.getService(DefaultServiceRegistry.java:842)
at org.gradle.internal.service.DefaultServiceRegistry$CompositeProvider.getService(DefaultServiceRegistry.java:787)
at org.gradle.internal.service.DefaultServiceRegistry$CompositeProvider.getService(DefaultServiceRegistry.java:787)
at org.gradle.internal.service.DefaultServiceRegistry$DefaultLookupContext.find(DefaultServiceRegistry.java:977)
at org.gradle.internal.service.DefaultServiceRegistry.doGet(DefaultServiceRegistry.java:289)
at org.gradle.internal.service.DefaultServiceRegistry.get(DefaultServiceRegistry.java:279)
at org.gradle.internal.service.DefaultServiceRegistry$ParentServices.getService(DefaultServiceRegistry.java:842)
at org.gradle.internal.service.DefaultServiceRegistry$CompositeProvider.getService(DefaultServiceRegistry.java:787)
at org.gradle.internal.service.DefaultServiceRegistry$CompositeProvider.getService(DefaultServiceRegistry.java:787)
at org.gradle.internal.service.DefaultServiceRegistry$DefaultLookupContext.find(DefaultServiceRegistry.java:977)
at org.gradle.internal.service.DefaultServiceRegistry.doGet(DefaultServiceRegistry.java:289)
at org.gradle.internal.service.DefaultServiceRegistry.get(DefaultServiceRegistry.java:275)
at org.gradle.api.internal.AbstractTask.(AbstractTask.java:133)
at org.gradle.api.internal.AbstractTask.(AbstractTask.java:106)
at org.gradle.api.DefaultTask.(DefaultTask.java:29)
at org.gradle.configuration.Help.(Help.java:30)
at org.gradle.configuration.Help_Decorated.(Unknown Source)
at org.gradle.api.internal.DependencyInjectingInstantiator.newInstance(DependencyInjectingInstantiator.java:62)
at org.gradle.api.internal.ClassGeneratorBackedInstantiator.newInstance(ClassGeneratorBackedInstantiator.java:36)
at org.gradle.api.internal.project.taskfactory.TaskFactory$1.call(TaskFactory.java:124)
… 81 more Caused by: java.lang.IllegalStateException: Operation stack is empty.
at org.gradle.cache.internal.cacheops.CacheOperationStack.checkNotEmpty(CacheOperationStack.java:67)
at org.gradle.cache.internal.cacheops.CacheOperationStack.getDescription(CacheOperationStack.java:26)
at org.gradle.cache.internal.cacheops.CacheAccessOperationsStack.getDescription(CacheAccessOperationsStack.java:57)
at org.gradle.cache.internal.DefaultCacheAccess.newCache(DefaultCacheAccess.java:327)
at org.gradle.cache.internal.DefaultCacheAccess.newCache(DefaultCacheAccess.java:42)
at org.gradle.cache.internal.DefaultPersistentDirectoryStore.createCache(DefaultPersistentDirectoryStore.java:94)
at org.gradle.cache.internal.DefaultCacheFactory$ReferenceTrackingCache.createCache(DefaultCacheFactory.java:173)
at org.gradle.api.internal.changedetection.state.DefaultTaskArtifactStateCacheAccess.createCache(DefaultTaskArtifactStateCacheAccess.java:50)
at org.gradle.api.internal.hash.CachingHasher.(CachingHasher.java:33)
at org.gradle.internal.service.scopes.TaskExecutionServices.createTaskArtifactStateRepository(TaskExecutionServices.java:64)
at org.gradle.internal.reflect.JavaMethod.invoke(JavaMethod.java:63)
at org.gradle.internal.service.DefaultServiceRegistry.invoke(DefaultServiceRegistry.java:319)
at org.gradle.internal.service.DefaultServiceRegistry.access$1200(DefaultServiceRegistry.java:53)
at org.gradle.internal.service.DefaultServiceRegistry$FactoryMethodService.invokeMethod(DefaultServiceRegistry.java:632)
… 110 more