@Delegate on static inner class does not work in JDK 9

[schauder]

This code

public class Host {

    static class StaticDelegate implements Consumer<String> {

    	@Delegate private Consumer<String> delegate;
    }
}

when compiled with JDK9 produces the compile error:

StaticDelegate is not abstract and does not override abstract method accept(String) in Consumer
static class StaticDelegate implements Consumer<String>

I tried it with the 1.16.16 release and the current edge release.

For a complete example including shell script and maven build file, see https://github.com/schauder/spring-data-from-java-9/blob/master/lombok/src/main/java/de/schauderhaft/jdk9/lombok/Host.java