Error in docs?

When I run this example from the docs 
<http://docs.cherrypy.org/en/latest/advanced.html?highlight=wsgi#no-need-for-the-wsgi-interface> 
in unchanged form, then accessing http://localhost:8080/ from browser 
produces the errors given below.  Is there a mistake in this CherryPy 
documentation code? (Section 'No need for the WSGI interface?')  Thanks!

If your application is a pure CherryPy application, you can switch to a 
HTTP server that by-passes the WSGI layer altogether. It will provide a 
slight performance increase.

# File nowsgi.py

import cherrypy
class Root(object):
    @cherrypy.expose
    def index(self):
        return "Hello World!"
if __name__ == '__main__':
    from cherrypy._cpnative_server import CPHTTPServer
    cherrypy.server.httpserver = CPHTTPServer(cherrypy.server)

    cherrypy.quickstart(Root(), '/')

$ python nowsgi.py
[23/Nov/2015:15:10:06] ENGINE Listening for SIGUSR1.
[23/Nov/2015:15:10:06] ENGINE Listening for SIGHUP.
[23/Nov/2015:15:10:06] ENGINE Listening for SIGTERM.
[23/Nov/2015:15:10:06] ENGINE Bus STARTING
CherryPy Checker:
The Application mounted at '' has an empty config.

[23/Nov/2015:15:10:06] ENGINE Started monitor thread 'Autoreloader'.
[23/Nov/2015:15:10:06] ENGINE Started monitor thread '_TimeoutMonitor'.
[23/Nov/2015:15:10:06] ENGINE Serving on http://127.0.0.1:8080
[23/Nov/2015:15:10:06] ENGINE Bus STARTED
[23/Nov/2015:15:10:11] NATIVE_ADAPTER Traceback (most recent call last):
  File "/usr/lib/python3.5/site-packages/cherrypy/_cpnative_server.py", 
line 27, in respond
    sn = cherrypy.tree.script_name(req.uri or "/")
  File "/usr/lib/python3.5/site-packages/cherrypy/_cptree.py", line 257, in 
script_name
    path = path[:path.rfind("/")]
TypeError: a bytes-like object is required, not 'str'

ValueError('invalid literal for int() with base 10: "b\'5"',)
Traceback (most recent call last):
  File "/usr/lib/python3.5/site-packages/cherrypy/_cpnative_server.py", 
line 27, in respond
    sn = cherrypy.tree.script_name(req.uri or "/")
  File "/usr/lib/python3.5/site-packages/cherrypy/_cptree.py", line 257, in 
script_name
    path = path[:path.rfind("/")]
TypeError: a bytes-like object is required, not 'str'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File 
"/usr/lib/python3.5/site-packages/cherrypy/wsgiserver/wsgiserver3.py", line 
1068, in communicate
    req.respond()
  File 
"/usr/lib/python3.5/site-packages/cherrypy/wsgiserver/wsgiserver3.py", line 
856, in respond
    self.server.gateway(self).respond()
  File "/usr/lib/python3.5/site-packages/cherrypy/_cpnative_server.py", 
line 88, in respond
    self.send_response(s, h, b)
  File "/usr/lib/python3.5/site-packages/cherrypy/_cpnative_server.py", 
line 101, in send_response
    req.send_headers()
  File 
"/usr/lib/python3.5/site-packages/cherrypy/wsgiserver/wsgiserver3.py", line 
912, in send_headers
    status = int(self.status[:3])
ValueError: invalid literal for int() with base 10: "b'5"
^C[23/Nov/2015:15:10:13] ENGINE Keyboard Interrupt: shutting down bus
[23/Nov/2015:15:10:13] ENGINE Bus STOPPING
[23/Nov/2015:15:10:13] ENGINE HTTP Server 
cherrypy._cpnative_server.CPHTTPServer(('127.0.0.1', 8080)) shut down
[23/Nov/2015:15:10:13] ENGINE Stopped thread '_TimeoutMonitor'.
[23/Nov/2015:15:10:13] ENGINE Stopped thread 'Autoreloader'.
[23/Nov/2015:15:10:13] ENGINE Bus STOPPED
[23/Nov/2015:15:10:13] ENGINE Bus EXITING
[23/Nov/2015:15:10:13] ENGINE Bus EXITED
[23/Nov/2015:15:10:13] ENGINE Waiting for child threads to terminate...

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