haarcascade_eye_tree_eyeglasses seems to be broken

edit

trying to build the example found on http://docs.opencv.org/3.1.0/db/d28/t...

on my Mac OSX opencv 3.1

application hangs when I try to run it using

String eyes_cascade_name = "haarcascade_eye_tree_eyeglasses.xml";

if I change the line for the one below it works.

String eyes_cascade_name = "haarcascade_eye.xml";