package jdk.nashorn.test.models;

import java.lang.invoke.MethodHandle;
import java.lang.invoke.MethodHandles;
import java.lang.invoke.MethodType;

public class NullProvider {
    public static Boolean getBoolean() { return null; }

    public static void main(String[] args) throws Throwable {
        MethodHandle mh = MethodHandles.lookup().findStatic(NullProvider.class, "getBoolean", MethodType.methodType(Boolean.class));
        mh = MethodHandles.explicitCastArguments(mh, MethodType.methodType(boolean.class));
        System.out.println(mh.invoke());
    }
}

throws:

Exception in thread "main" java.lang.NullPointerException
at sun.invoke.util.ValueConversions.unboxBoolean(ValueConversions.java:95)
at jdk.nashorn.test.models.NullProvider.main(NullProvider.java:13)

Expected result would be printing "false", as per documentation for explicitCastArgument that says "If T0 is a reference and T1 a primitive, and if the reference is null at runtime, a zero value is introduced."

This happens with 9 builds (e.g. just reproduced it with 9 b34). 8 builds (e.g. recent 8u40 early access release builds) seem to behave okay.