Bitmask CLI raises an exception when logging out

Using:

• bitmask-dev: 1e6a435a
• soledad: a7ffb49e1169c93af3b728f5db1a5e16e6231590
• cdev env: with experimental-0.9 platform and beta soledad 0.9.0

Then I'm typing the following commands:

bitmaskctl launch
bitmaskctl user auth drebs@cdev.bitmask.net

After that, I try to logout, and get the following:

$ bitmaskctl user logout drebs@cdev.bitmask.net
Unhandled error in Deferred:


Traceback (most recent call last):
  File "/home/drebs/.venv/local/lib/python2.7/site-packages/twisted/python/context.py", line 81, in callWithContext
    return func(*args,**kw)
  File "/home/drebs/.venv/local/lib/python2.7/site-packages/txzmq/req_rep.py", line 140, in messageReceived
    d.callback(msg)
  File "/home/drebs/.venv/local/lib/python2.7/site-packages/twisted/internet/defer.py", line 393, in callback
    self._startRunCallbacks(result)
  File "/home/drebs/.venv/local/lib/python2.7/site-packages/twisted/internet/defer.py", line 501, in _startRunCallbacks
    self._runCallbacks()
---  ---
  File "/home/drebs/.venv/local/lib/python2.7/site-packages/twisted/internet/defer.py", line 588, in _runCallbacks
    current.result = callback(current.result, *args, **kw)
  File "/home/drebs/dev/leap/repos/bitmask-dev/src/leap/bitmask/cli/command.py", line 112, in _check_err
    return printer(obj['result'])
  File "/home/drebs/dev/leap/repos/bitmask-dev/src/leap/bitmask/cli/command.py", line 42, in default_dict_printer
    for key, value in result.items():
exceptions.AttributeError: 'NoneType' object has no attribute 'items'

Logout seems to work, though (it's a CLI-only bug). This is the log for after the logout command:

2016-09-12T15:12:07-0300 [ZMQ] LOGOUT for drebs@cdev.bitmask.net
2016-09-12T15:12:07-0300 [twisted.web.client._HTTP11ClientFactory#info] Starting factory 
2016-09-12T15:12:09-0300 [stdout#info] AUTH 
2016-09-12T15:12:09-0300 [stdout#info] resetting user/pass
2016-09-12T15:12:09-0300 [twisted.web.client._HTTP11ClientFactory#info] Stopping factory 

(from redmine: created on 2016-09-12, closed on 2016-09-27, relates #8479 (closed))