IOS BGP not active error

[bewing]

In [3]: with IOSDriver("ios01", os.environ.get("NAPALM_USERNAME"), os.environ.get("NAPALM_PASSWORD")) as d:
   ...:     d.get_bgp_neighbors()
   ...:
NAPALM didn't catch this exception. Please, fill a bugfix on https://github.com/napalm-automation/napalm/issues
Don't forget to include this traceback.
---------------------------------------------------------------------------
AddrFormatError                           Traceback (most recent call last)
<ipython-input-3-fc2e1223ed9d> in <module>
      1 with IOSDriver("ios01", os.environ.get("NAPALM_USERNAME"), os.environ.get("NAPALM_PASSWORD")) as d:
----> 2     d.get_bgp_neighbors()
      3

/mnt/c/Users/bewing/PycharmProjects/napalm/napalm/ios/ios.py in get_bgp_neighbors(self)
   1697
   1698         # check the router_id looks like an ipv4 address
-> 1699         router_id = napalm.base.helpers.ip(router_id, version=4)
   1700
   1701         # add parsed data to output dict

/mnt/c/Users/bewing/PycharmProjects/napalm/napalm/base/helpers.py in ip(addr, version)
    328         u'2001:db8:85a3::8a2e:370:7334'
    329     """
--> 330     addr_obj = IPAddress(addr)
    331     if version and addr_obj.version != version:
    332         raise ValueError("{} is not an ipv{} address".format(addr, version))

/mnt/c/Users/bewing/.pyenv/versions/3.6.6/envs/napalm/lib/python3.6/site-packages/netaddr/ip/__init__.py in __init__(self, addr, version, flags)
    304                 if self._module is None:
    305                     raise AddrFormatError('failed to detect a valid IP ' \
--> 306                         'address from %r' % addr)
    307             else:
    308                 #   IP version is explicit.

AddrFormatError: failed to detect a valid IP address from None

ios01#show bgp all summary
% BGP not active

ios01#

Looks like we need to detect this in line 1478. Do we really want to raise a CommandErrorException, or just return an empty dictionary?