According to javadoc, MethodHandleAccessProvider.lookupMethodHandleIntrinsic(ResolvedJavaMethod method) should return null if the method is not an instrinsic processed by this interface.
Hiowever, current implementation (HotSpotMethodHandleAccessProvider.lookupMethodHandleIntrinsic) throws NPE on null argument. Method behaviour should be fixed or, alternatively, javadoc updated respectively.