ssh_auth.present unhashable type list

gistfile1.txt

...  
  ssh_auth.present:
    - require:
      - user: foo
    - user: foo
    - source:
      - salt://users/files/ssh_public_keys/foo.id_rsa.pub
    - config: /%h/.ssh/authorized_keys



017-09-14 10:24:51,374 [salt.state       ][ERROR   ][122578] An exception occurred in this state: Traceback (most recent call last):
  File "/usr/lib/python2.7/site-packages/salt/state.py", line 1745, in call
    **cdata['kwargs'])
  File "/usr/lib/python2.7/site-packages/salt/loader.py", line 1702, in wrapper
    return f(*args, **kwargs)
  File "/usr/lib/python2.7/site-packages/salt/states/ssh_auth.py", line 281, in present
    config,
  File "/usr/lib/python2.7/site-packages/salt/states/ssh_auth.py", line 68, in _present_test
    saltenv=__env__)
  File "/usr/lib/python2.7/site-packages/salt/modules/ssh.py", line 383, in check_key_file
    keyfile = __salt__['cp.cache_file'](source, saltenv)
  File "/usr/lib/python2.7/site-packages/salt/modules/cp.py", line 380, in cache_file
    path_is_remote = _urlparse(path).scheme in ('http', 'https', 'ftp')
  File "/usr/lib64/python2.7/urlparse.py", line 142, in urlparse
    tuple = urlsplit(url, scheme, allow_fragments)
  File "/usr/lib64/python2.7/urlparse.py", line 175, in urlsplit
    cached = _parse_cache.get(key, None)
TypeError: unhashable type: 'list'