Got following exception on deploying a servlet application that uses Interceptor to Tomcat+CDI
apache-tomcat-9.0.0.M17
weld-servlet-3.0.0.Alpha1.jar
cdi-api-2.0.Beta1.jar
javax.inject-1.jar
javax.annotation-api-1.2.jar
javax.interceptor-api-1.2.jar
JDK 9 (tried b138, b143, b153)

24-Jan-2017 23:05:18.682 INFO [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployWAR Deploying web application archive /opt/tomcat/apache-tomcat-9.0.0.M17/webapps/servlet5.war
24-Jan-2017 23:05:20.043 INFO [localhost-startStop-1] org.apache.jasper.servlet.TldScanner.scanJars At least one JAR was scanned for TLDs yet contained no TLDs. Enable debug logging for this logger for a complete list of JARs that were scanned but no TLDs were found in them. Skipping unneeded JARs during scanning can improve startup time and JSP compilation time.
log4j:WARN No appenders could be found for logger (org.jboss.logging).
log4j:WARN Please initialize the log4j system properly.
log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for more info.
[EventCDIExtension]: beforeBeanDiscovery(): beforeBeanDiscovery=org.jboss.weld.bootstrap.events.BeforeBeanDiscoveryImpl@90b0dec, beanManager=Weld BeanManager for /opt/tomcat/apache-tomcat-9.0.0.M17/webapps/servlet5/WEB-INF/classes [bean count=3]
24-Jan-2017 23:05:21.435 SEVERE [localhost-startStop-1] org.apache.catalina.core.ContainerBase.addChildInternal ContainerBase.addChild: start:
org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/servlet5]]
at org.apache.catalina.util.LifecycleBase.handleSubClassException(LifecycleBase.java:441)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:198)
at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:752)
at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:728)
at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:734)
at org.apache.catalina.startup.HostConfig.deployWAR(HostConfig.java:952)
at org.apache.catalina.startup.HostConfig$DeployWar.run(HostConfig.java:1823)
at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:514)
at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1161)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
at java.base/java.lang.Thread.run(Thread.java:844)
Caused by: org.jboss.weld.exceptions.WeldException: WELD-001524: Unable to load proxy class for bean Managed Bean [class MyBean] with qualifiers [@Any @Default] with class class MyBean using classloader ParallelWebappClassLoader
context: servlet5
delegate: false
----------> Parent Classloader:
java.net.URLClassLoader@4bbfb90a

at org.jboss.weld.bean.proxy.ProxyFactory.getProxyClass(ProxyFactory.java:347)
at org.jboss.weld.injection.producer.SubclassedComponentInstantiator.createEnhancedSubclass(SubclassedComponentInstantiator.java:97)
at org.jboss.weld.injection.producer.SubclassedComponentInstantiator.initEnhancedSubclass(SubclassedComponentInstantiator.java:81)
at org.jboss.weld.injection.producer.SubclassedComponentInstantiator.<init>(SubclassedComponentInstantiator.java:74)
at org.jboss.weld.injection.producer.SubclassedComponentInstantiator.forInterceptedDecoratedBean(SubclassedComponentInstantiator.java:58)
at org.jboss.weld.injection.producer.BeanInjectionTarget.initializeAfterBeanDiscovery(BeanInjectionTarget.java:138)
at org.jboss.weld.injection.producer.InjectionTargetInitializationContext.initialize(InjectionTargetInitializationContext.java:42)
at org.jboss.weld.injection.producer.InjectionTargetService.initialize(InjectionTargetService.java:63)
at org.jboss.weld.bootstrap.WeldStartup.deployBeans(WeldStartup.java:423)
at org.jboss.weld.bootstrap.WeldBootstrap.deployBeans(WeldBootstrap.java:83)
at org.jboss.weld.environment.servlet.WeldServletLifecycle.initialize(WeldServletLifecycle.java:172)
at org.jboss.weld.environment.servlet.EnhancedListener.onStartup(EnhancedListener.java:60)
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5168)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
... 10 more
Caused by: java.lang.RuntimeException: java.lang.ClassFormatError: Illegal class name "/MyBean$Proxy$$$_WeldSubclass" in class file /MyBean$Proxy$$$_WeldSubclass
at org.jboss.weld.util.bytecode.ClassFileUtils.toClass(ClassFileUtils.java:101)
at org.jboss.weld.bean.proxy.ProxyFactory.createProxyClass(ProxyFactory.java:463)
at org.jboss.weld.bean.proxy.ProxyFactory.getProxyClass(ProxyFactory.java:340)
... 23 more
Caused by: java.lang.ClassFormatError: Illegal class name "/MyBean$Proxy$$$_WeldSubclass" in class file /MyBean$Proxy$$$_WeldSubclass
at java.base/java.lang.ClassLoader.defineClass1(Native Method)
at java.base/java.lang.ClassLoader.defineClass(ClassLoader.java:977)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:543)
at org.jboss.weld.util.bytecode.ClassFileUtils.toClass2(ClassFileUtils.java:108)
at org.jboss.weld.util.bytecode.ClassFileUtils.toClass(ClassFileUtils.java:97)
... 25 more

24-Jan-2017 23:05:21.438 SEVERE [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployWAR Error deploying web application archive /opt/tomcat/apache-tomcat-9.0.0.M17/webapps/servlet5.war
java.lang.IllegalStateException: ContainerBase.addChild: start: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/servlet5]]
at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:756)
at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:728)
at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:734)
at org.apache.catalina.startup.HostConfig.deployWAR(HostConfig.java:952)
at org.apache.catalina.startup.HostConfig$DeployWar.run(HostConfig.java:1823)
at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:514)
at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1161)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
at java.base/java.lang.Thread.run(Thread.java:844)