test/jdk/java/lang/invoke/defineHiddenClass/src/HiddenLambda.java

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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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import java.util.function.Function;

public class HiddenLambda implements HiddenTest {
     public void test() {
         Function<Object, String> f = o -> o.toString();
         String s = f.apply(this);
         throw new Error("thrown by " + s);
     }

     public String toString() {
         return getClass().getName();
     }
}