Traceback (most recent call last):

 "/home/ionel/projects/celery-bug-1316/.ve/local/lib/python2.7/site-packages/billiard/pool.py", line 259, in run
sys.exit(self.workloop())

 "/home/ionel/projects/celery-bug-1316/.ve/local/lib/python2.7/site-packages/billiard/pool.py", line 305, in workloop
req = wait_for_job()

 "/home/ionel/projects/celery-bug-1316/.ve/local/lib/python2.7/site-packages/billiard/pool.py", line 398, in receive
ready, req = _receive(1.0)

 "/home/ionel/projects/celery-bug-1316/.ve/local/lib/python2.7/site-packages/billiard/pool.py", line 369, in _recv
return True, loads(get_payload())

 "/home/ionel/projects/celery-bug-1316/.ve/local/lib/python2.7/site-packages/billiard/common.py", line 64, in pickle_loads
return load(BytesIO(s))UnpicklingError: invalid load key, '?'.
Traceback (most recent call last):


 "/usr/src/app/homeassistant/helpers/entity_platform.py", line 352, in _async_add_entity

await entity.async_update_ha_state()


 "/usr/src/app/homeassistant/helpers/entity.py", line 225, in async_update_ha_state

self._async_write_ha_state()


 "/usr/src/app/homeassistant/helpers/entity.py", line 255, in _async_write_ha_state

attr = self.state_attributes or {}


 "/usr/src/app/homeassistant/components/climate/__init__.py", line 218, in state_attributes

self.hass, self.min_temp, self.temperature_unit,


 "/usr/src/app/homeassistant/components/climate/__init__.py", line 514, in min_temp

self.temperature_unit)


 "/usr/src/app/homeassistant/util/temperature.py", line 28, in convert

to_unit, TEMPERATURE))
ValueError: None is not a recognized temperature unit.
