See http://mail.openjdk.java.net/pipermail/core-libs-dev/2018-September/055125.html

Exception in thread "main" java.lang.reflect.InvocationTargetException
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:564)
at SW.main(SW.java:13)
Caused by: java.lang.reflect.InvocationTargetException
at java.base/jdk.internal.reflect.GeneratedMethodAccessor1.invoke(Unknown Source)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:564)
... 5 more
Caused by: java.lang.reflect.InvocationTargetException
at java.base/jdk.internal.reflect.GeneratedMethodAccessor1.invoke(Unknown Source)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:564)
... 8 more
Caused by: java.lang.reflect.InvocationTargetException
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:564)
... 11 more
Caused by: java.lang.UnsupportedOperationException: StackWalker::getCallerClass called from @CallerSensitive java.lang.reflect.Method.invoke(Ljava/lang/Object;[Ljava/lang/Object;)Ljava/lang/Object; method
at java.base/java.lang.StackStreamFactory$AbstractStackWalker.fetchStackFrames(Native Method)
at java.base/java.lang.StackStreamFactory$AbstractStackWalker.fetchStackFrames(StackStreamFactory.java:386)
at java.base/java.lang.StackStreamFactory$AbstractStackWalker.getNextBatch(StackStreamFactory.java:322)
at java.base/java.lang.StackStreamFactory$AbstractStackWalker.peekFrame(StackStreamFactory.java:263)
at java.base/java.lang.StackStreamFactory$AbstractStackWalker.hasNext(StackStreamFactory.java:351)
at java.base/java.lang.StackStreamFactory$AbstractStackWalker.nextFrame(StackStreamFactory.java:336)
at java.base/java.lang.StackStreamFactory$CallerClassFinder.consumeFrames(StackStreamFactory.java:683)
at java.base/java.lang.StackStreamFactory$CallerClassFinder.consumeFrames(StackStreamFactory.java:612)
at java.base/java.lang.StackStreamFactory$AbstractStackWalker.doStackWalk(StackStreamFactory.java:306)
at java.base/java.lang.StackStreamFactory$AbstractStackWalker.callStackWalk(Native Method)
at java.base/java.lang.StackStreamFactory$AbstractStackWalker.beginStackWalk(StackStreamFactory.java:370)
at java.base/java.lang.StackStreamFactory$AbstractStackWalker.walk(StackStreamFactory.java:243)
at java.base/java.lang.StackStreamFactory$CallerClassFinder.findCaller(StackStreamFactory.java:670)
at java.base/java.lang.StackWalker.getCallerClass(StackWalker.java:600)
at SW.bar(SW.java:19)
... 15 more