Unexpected exception when getting empty config

[111pontes]

Using NETCONF service, get_config operation throws an unexpected exception if there's no configuration data on the device:

<rpc xmlns="urn:ietf:params:xml:ns:netconf:base:1.0" message-id="urn:uuid:9ca86d33-1e92-43e9-8302-e7eb7b649c14">
  <get-config>
    <source>
      <running></running>
    </source>
    <filter>
      <ip-domain xmlns="http://cisco.com/ns/yang/Cisco-IOS-XR-ip-domain-cfg"/>
    </filter>
  </get-config>
</rpc>

2016-11-18 16:28:18,908 - ydk.services.NetconfService - INFO - Netconf operation completed
Traceback (most recent call last):
  File "./nc-get-config-xr-ip-domain-cfg-99-ydk.py", line 79, in <module>
    ip_domain = netconf.get_config(provider, Datastore.running, ip_domain)
  File "/usr/local/lib/python2.7/dist-packages/ydk/services/netconf_service.py", line 311, in get_config
    return provider.decode(payload_convert(payload), None)
  File "/usr/local/lib/python2.7/dist-packages/ydk/services/netconf_service.py", line 469, in payload_convert
    return etree.tostring(chchs[0], pretty_print=True, encoding='utf-8').decode('utf-8')
IndexError: list index out of range