salt: docker_image.py - UnboundLocalError

Description of Issue/Question

bad python reference

                File "/usr/lib/python3/dist-packages/salt/state.py", line 1878, in call
                  **cdata['kwargs'])
                File "/usr/lib/python3/dist-packages/salt/loader.py", line 1823, in wrapper
                  return f(*args, **kwargs)
                File "/usr/lib/python3/dist-packages/salt/states/docker_image.py", line 362, in present
                  if error:
              UnboundLocalError: local variable 'error' referenced before assignment

Setup

(Please provide relevant configs and/or SLS files (Be sure to remove sensitive info).)

std install

Steps to Reproduce Issue

(Include debug logs if possible and relevant.)

nada

Versions Report

(Provided by running salt --versions-report. Please also mention any differences in master/minion versions.)

sudo salt --versions-report
Salt Version:
           Salt: 2018.3.0

Dependency Versions:
           cffi: Not Installed
       cherrypy: 3.5.0
       dateutil: 2.4.2
      docker-py: Not Installed
          gitdb: 0.6.4
      gitpython: 1.0.1
          ioflo: Not Installed
         Jinja2: 2.8
        libgit2: Not Installed
        libnacl: Not Installed
       M2Crypto: Not Installed
           Mako: Not Installed
   msgpack-pure: Not Installed
 msgpack-python: 0.4.6
   mysql-python: Not Installed
      pycparser: Not Installed
       pycrypto: 2.6.1
   pycryptodome: Not Installed
         pygit2: Not Installed
         Python: 3.5.2 (default, Nov 23 2017, 16:37:01)
   python-gnupg: Not Installed
         PyYAML: 3.11
          PyZMQ: 15.2.0
           RAET: Not Installed
          smmap: 0.9.0
        timelib: Not Installed
        Tornado: 4.2.1
            ZMQ: 4.1.4

System Versions:
           dist: Ubuntu 16.04 xenial
         locale: ANSI_X3.4-1968
        machine: x86_64
        release: 4.4.0-1054-aws
         system: Linux
        version: Ubuntu 16.04 xenial