The following code:

    MethodHandle mh = MethodHandles.empty(MethodType.methodType(void.class, int.class, int.class));
    MethodHandles.permuteArguments(mh, MethodType.methodType(void.class, int.class), 0, 0);

Throws:

Exception in thread "main" java.lang.NullPointerException: Cannot invoke "java.lang.invoke.LambdaForm$Name.isParam()" because "name" is null
at java.base/java.lang.invoke.LambdaFormBuffer.endEdit(LambdaFormBuffer.java:304)
at java.base/java.lang.invoke.LambdaFormEditor.dupArgumentForm(LambdaFormEditor.java:585)
at java.base/java.lang.invoke.MethodHandles.permuteArguments(MethodHandles.java:4649)
at main.Main.main(Main.java:11)