If an interceptor binding is missing an @Target annotation then weld throws a NPE on startup:

Caused by: com.google.common.collect.ComputationException: java.lang.NullPointerException
at com.google.common.collect.ComputingConcurrentHashMap.compute(ComputingConcurrentHashMap.java:218)
at com.google.common.collect.ComputingConcurrentHashMap.apply(ComputingConcurrentHashMap.java:100)
at com.google.common.collect.MapMaker$ComputingMapAdapter.get(MapMaker.java:515)
at org.jboss.weld.metadata.cache.MetaAnnotationStore.getInterceptorBindingModel(MetaAnnotationStore.java:224)
at org.jboss.weld.manager.BeanManagerImpl.isInterceptorBinding(BeanManagerImpl.java:1140)
at org.jboss.weld.bean.AbstractClassBean.flattenInterceptorBindings(AbstractClassBean.java:126)
at org.jboss.weld.bean.AbstractClassBean.initInterceptionModelForType(AbstractClassBean.java:218)
at org.jboss.weld.bean.AbstractClassBean.initialize(AbstractClassBean.java:207)
at org.jboss.weld.bean.ManagedBean.initialize(ManagedBean.java:372)
at org.jboss.weld.bootstrap.AbstractBeanDeployer.deploy(AbstractBeanDeployer.java:113)
at org.jboss.weld.bootstrap.BeanDeployment.deployBeans(BeanDeployment.java:216)
at org.jboss.weld.bootstrap.WeldBootstrap.deployBeans(WeldBootstrap.java:370)
at org.jboss.arquillian.container.weld.ee.embedded_1_1.mock.TestContainer.startContainer(TestContainer.java:258)
at org.jboss.arquillian.container.weld.ee.embedded_1_1.WeldEEMockContainer.deploy(WeldEEMockContainer.java:71)
at org.jboss.arquillian.impl.handler.ContainerDeployer.callback(ContainerDeployer.java:62)
at org.jboss.arquillian.impl.handler.ContainerDeployer.callback(ContainerDeployer.java:50)
at org.jboss.arquillian.impl.event.MapEventManager.fire(MapEventManager.java:63)
... 45 more
Caused by: java.lang.NullPointerException
at org.jboss.weld.metadata.cache.InterceptorBindingModel.isValidTargetType(InterceptorBindingModel.java:115)
at org.jboss.weld.metadata.cache.InterceptorBindingModel.check(InterceptorBindingModel.java:106)
at org.jboss.weld.metadata.cache.AnnotationModel.init(AnnotationModel.java:66)
at org.jboss.weld.metadata.cache.InterceptorBindingModel.init(InterceptorBindingModel.java:65)
at org.jboss.weld.metadata.cache.AnnotationModel.<init>(AnnotationModel.java:56)
at org.jboss.weld.metadata.cache.InterceptorBindingModel.<init>(InterceptorBindingModel.java:59)
at org.jboss.weld.metadata.cache.MetaAnnotationStore$InterceptorBindingFunction.apply(MetaAnnotationStore.java:115)
at org.jboss.weld.metadata.cache.MetaAnnotationStore$InterceptorBindingFunction.apply(MetaAnnotationStore.java:105)
at com.google.common.collect.ComputingConcurrentHashMap.compute(ComputingConcurrentHashMap.java:206)
... 61 more