Start-up fails if P1 plugin component dependency class is missing

Exception sending context initialized event to listener instance of class com.atlassian.confluence.plugin.PluginFrameworkContextListener
java.lang.NoClassDefFoundError: com/atlassian/confluence/core/SmartListManager
	at java.lang.Class.getDeclaredMethods0(Native Method)
	at java.lang.Class.privateGetDeclaredMethods(Class.java:2701)
	at java.lang.Class.getDeclaredMethods(Class.java:1975)
	at org.springframework.util.ReflectionUtils.doWithMethods(ReflectionUtils.java:460)
	at org.springframework.util.ReflectionUtils.doWithMethods(ReflectionUtils.java:443)
	at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor.buildLifecycleMetadata(InitDestroyAnnotationBeanPostProcessor.java:202)
	at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor.findLifecycleMetadata(InitDestroyAnnotationBeanPostProcessor.java:190)
	at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor.postProcessMergedBeanDefinition(InitDestroyAnnotationBeanPostProcessor.java:119)
	at org.springframework.context.annotation.CommonAnnotationBeanPostProcessor.postProcessMergedBeanDefinition(CommonAnnotationBeanPostProcessor.java:275)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyMergedBeanDefinitionPostProcessors(AbstractAutowireCapableBeanFactory.java:745)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:448)
	at com.atlassian.confluence.setup.ConfluenceListableBeanFactory.createBean(ConfluenceListableBeanFactory.java:235)
	at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:264)
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222)
	at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:261)
	at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:185)
	at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:164)
	at com.atlassian.confluence.plugin.descriptor.ComponentModuleDescriptor.disabled(ComponentModuleDescriptor.java:104)
	at com.atlassian.plugin.manager.DefaultPluginManager.publishModuleDisabledEvents(DefaultPluginManager.java:1952)
	at com.atlassian.plugin.manager.DefaultPluginManager.notifyModuleDisabled(DefaultPluginManager.java:1942)
	at com.atlassian.plugin.manager.DefaultPluginManager.enableConfiguredPluginModule(DefaultPluginManager.java:1750)
	at com.atlassian.plugin.manager.DefaultPluginManager.enableConfiguredPluginModules(DefaultPluginManager.java:1715)
	at com.atlassian.plugin.manager.DefaultPluginManager.enableDependentPlugins(DefaultPluginManager.java:1227)
	at com.atlassian.plugin.manager.DefaultPluginManager.addPlugins(DefaultPluginManager.java:1188)
	at com.atlassian.plugin.manager.DefaultPluginManager.lateStartup(DefaultPluginManager.java:634)
	at com.atlassian.confluence.plugin.ConfluencePluginManager.lateStartup(ConfluencePluginManager.java:170)
	at com.atlassian.confluence.plugin.PluginFrameworkContextListener.contextInitialized(PluginFrameworkContextListener.java:88)
	at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4729)
	at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5167)
	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
	at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1409)
	at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1399)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
	at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.ClassNotFoundException: com.atlassian.confluence.core.SmartListManager
	at java.lang.ClassLoader.findClass(ClassLoader.java:530)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
	at com.atlassian.plugin.classloader.PluginClassLoader.loadClass(PluginClassLoader.java:162)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
	... 36 more