The following test case:

public class Test {
    public static void main(String[] args) throws Exception {
        java.lang.invoke.MethodHandles.constant(boolean.class, true);
    }
}

throws an exception:

Exception in thread "main" java.lang.ExceptionInInitializerError
at Test.main(Test.java:5)
Caused by: java.lang.IllegalArgumentException: no leading reference parameter: true
at java.lang.invoke.MethodHandleStatics.newIllegalArgumentException(MethodHandleStatics.java:81)
at java.lang.invoke.MethodHandle.bindTo(MethodHandle.java:1009)
at java.lang.invoke.MethodHandles.constant(MethodHandles.java:1625)
...