Stack trace for hibernate-validator 5.1.2 is (running in wildlfly 8.1.0):

java.lang.ArrayIndexOutOfBoundsException: 0
at org.hibernate.validator.internal.util.ExecutableHelper.instanceMethodParametersResolveToSameTypes(ExecutableHelper.java:141)
at org.hibernate.validator.internal.util.ExecutableHelper.overrides(ExecutableHelper.java:101)
at org.hibernate.validator.internal.cdi.ValidationExtension.replaceWithOverriddenOrInterfaceMethod(ValidationExtension.java:425)
at org.hibernate.validator.internal.cdi.ValidationExtension.determineConstrainedMethod(ValidationExtension.java:275)
at org.hibernate.validator.internal.cdi.ValidationExtension.determineConstrainedCallables(ValidationExtension.java:262)
at org.hibernate.validator.internal.cdi.ValidationExtension.processAnnotatedType(ValidationExtension.java:242)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at org.jboss.weld.injection.MethodInjectionPoint.invokeOnInstanceWithSpecialValue(MethodInjectionPoint.java:93)
at org.jboss.weld.event.ObserverMethodImpl.sendEvent(ObserverMethodImpl.java:266)
at org.jboss.weld.event.ExtensionObserverMethodImpl.sendEvent(ExtensionObserverMethodImpl.java:125)
at org.jboss.weld.event.ObserverMethodImpl.sendEvent(ObserverMethodImpl.java:253)
at org.jboss.weld.event.ObserverMethodImpl.notify(ObserverMethodImpl.java:232)
at org.jboss.weld.event.ObserverNotifier.notifyObserver(ObserverNotifier.java:169)
at org.jboss.weld.event.ObserverNotifier.notifyObservers(ObserverNotifier.java:128)
at org.jboss.weld.event.ObserverNotifier.fireEvent(ObserverNotifier.java:107)
at org.jboss.weld.bootstrap.events.ProcessAnnotatedTypeImpl.fire(ProcessAnnotatedTypeImpl.java:93)
at org.jboss.weld.bootstrap.events.ContainerLifecycleEvents.fireProcessAnnotatedType(ContainerLifecycleEvents.java:146)
at org.jboss.weld.bootstrap.BeanDeployer.processAnnotatedTypes(BeanDeployer.java:179)
at org.jboss.weld.bootstrap.BeanDeployment.createTypes(BeanDeployment.java:228)
at org.jboss.weld.bootstrap.WeldStartup.startInitialization(WeldStartup.java:338)
at org.jboss.weld.bootstrap.WeldBootstrap.startInitialization(WeldBootstrap.java:73)
at org.jboss.as.weld.WeldStartService.start(WeldStartService.java:91)
at org.jboss.msc.service.ServiceControllerImpl$StartTask.startService(ServiceControllerImpl.java:1948)
at org.jboss.msc.service.ServiceControllerImpl$StartTask.run(ServiceControllerImpl.java:1881)
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)

at org.jboss.weld.bootstrap.events.ProcessAnnotatedTypeImpl.fire(ProcessAnnotatedTypeImpl.java:98)
at org.jboss.weld.bootstrap.events.ContainerLifecycleEvents.fireProcessAnnotatedType(ContainerLifecycleEvents.java:146)
at org.jboss.weld.bootstrap.BeanDeployer.processAnnotatedTypes(BeanDeployer.java:179)
at org.jboss.weld.bootstrap.BeanDeployment.createTypes(BeanDeployment.java:228)
at org.jboss.weld.bootstrap.WeldStartup.startInitialization(WeldStartup.java:338)
at org.jboss.weld.bootstrap.WeldBootstrap.startInitialization(WeldBootstrap.java:73)
at org.jboss.as.weld.WeldStartService.start(WeldStartService.java:91)
at org.jboss.msc.service.ServiceControllerImpl$StartTask.startService(ServiceControllerImpl.java:1948) [jboss-msc-1.2.2.Final.jar:1.2.2.Final]
at org.jboss.msc.service.ServiceControllerImpl$StartTask.run(ServiceControllerImpl.java:1881) [jboss-msc-1.2.2.Final.jar:1.2.2.Final]
... 3 more