IncompatibleClassChangeError example

[Peter Levart]

Hi,

When I compile and run the following program with the latest tip of 
lambda repo:


import java.util.function.Function;
import java.util.function.Supplier;

public class ICCEBug {

     interface Value<T> extends Supplier<T> {
         default <R> Value<R> map(Function<? super T, ? extends R> mapper) {
             return new SuppliedValue<>(() -> mapper.apply(this.get()));
         }
     }

     static class SuppliedValue<T> implements Value<T> {
         private final Supplier<T> supplier;

         SuppliedValue(Supplier<T> supplier) {
             this.supplier = supplier;
         }

         @Override
         public T get() {
             return supplier.get();
         }
     }

     public static void main(String[] args) {
         Value<String> name = () -> "Peter";
         Value<String> sentence = name.map(nm -> "Hello " + nm + "!");
         System.out.println(sentence.get());
     }
}



... I get the following exception:

Exception in thread "main" java.lang.IncompatibleClassChangeError: Class 
ICCEBug$$Lambda$2 does not implement the requested interface ICCEBug$Value
     at ICCEBug$Value.lambda$0(ICCEBug.java:17)
     at ICCEBug$Value$$Lambda$3.get(Unknown Source)
     at ICCEBug$SuppliedValue.get(ICCEBug.java:30)
     at ICCEBug.main(ICCEBug.java:37)



It looks like something is not compiled correctly.

Regards, Peter