GET user roles throws stack trace

[ayoung@ayoungstack devstack]$ curl -H "X-Auth-Token:3fe4d4433a9d4fcf9ae717845a5f1135" http://10.16.184.54:35357/v2.0/users/a56c1e8001de4835a248153b0ab8d523
{"user": {"name": "nova", "enabled": true, "email": "<email address hidden>", "id": "a56c1e8001de4835a248153b0ab8d523", "tenantId": "0d44435dedd94caea265f829fa3f6e5e"}}[ayoung@ayoungstack devstack]$

But

curl -H "X-Auth-Token:3fe4d4433a9d4fcf9ae717845a5f1135" http://10.16.184.54:35357/v2.0/users/a56c1e8001de4835a248153b0ab8d523/roles
...

  File "/usr/lib/python2.7/site-packages/WebOb-1.0.8-py2.7.egg/webob/dec.py", line 208, in call_func
    return self.func(req, *args, **kwargs)
  File "/opt/stack/keystone/keystone/common/wsgi.py", line 178, in __call__
    method = getattr(self, action)
AttributeError: 'UserController' object has no attribute 'get_user_roles'

Using the SQL Backend.