A DESCRIPTION OF THE PROBLEM :
The documentation for the MethodHandles.dropArguments methods lists the parameter not in the order in which they appear in the method signature. `pos` is documented as third parameter despite actually being the second one:
https://docs.oracle.com/en/java/javase/13/docs/api/java.base/java/lang/invoke/MethodHandles.html#dropArguments(java.lang.invoke.MethodHandle,int,java.lang.Class...)
https://docs.oracle.com/en/java/javase/13/docs/api/java.base/java/lang/invoke/MethodHandles.html#dropArguments(java.lang.invoke.MethodHandle,int,java.util.List)