Traceback (most recent call last):


 "/usr/lib/python3.5/asyncio/tasks.py", line 239, in _step

result = coro.send(None)


 "/usr/local/lib/python3.5/dist-packages/homeassistant/helpers/entity_platform.py", line 352, in _async_add_entity

await entity.async_update_ha_state()


 "/usr/local/lib/python3.5/dist-packages/homeassistant/helpers/entity.py", line 239, in async_update_ha_state

attr = self.state_attributes or {}


 "/usr/local/lib/python3.5/dist-packages/homeassistant/components/media_player/__init__.py", line 787, in state_attributes

in ATTR_TO_PROPERTY if getattr(self, attr) is not None


 "/usr/local/lib/python3.5/dist-packages/homeassistant/components/media_player/__init__.py", line 787, in <dictcomp>

in ATTR_TO_PROPERTY if getattr(self, attr) is not None


 "/usr/local/lib/python3.5/dist-packages/homeassistant/components/media_player/songpal.py", line 289, in source

return self._active_source.title
AttributeError: 'NoneType' object has no attribute 'title'

Traceback (most recent call last):


 "savemodel_error.py", line 10, in <module>

gpflow.utilities.freeze(m)


 "/Users/jxiong/Documents/Projects/ipsc_gplvm/env/lib/python3.6/site-packages/gpflow/utilities/utilities.py", line 281, in freeze

module_copy = deepcopy(input_module, memo_tensors)


 "/Users/jxiong/Documents/Projects/ipsc_gplvm/env/lib/python3.6/site-packages/gpflow/utilities/utilities.py", line 269, in deepcopy

return copy.deepcopy(reset_cache_bijectors(input_module), memo)


 "/Users/jxiong/Documents/Projects/ipsc_gplvm/env/lib/python3.6/site-packages/gpflow/utilities/utilities.py", line 253, in reset_cache_bijectors

_ = traverse_module(input_module, accumulator, clear_bijector, target_types)


 "/Users/jxiong/Documents/Projects/ipsc_gplvm/env/lib/python3.6/site-packages/gpflow/utilities/utilities.py", line 324, in traverse_module

new_state = traverse_module(submodule, new_acc, update_cb, target_types)


 "/Users/jxiong/Documents/Projects/ipsc_gplvm/env/lib/python3.6/site-packages/gpflow/utilities/utilities.py", line 324, in traverse_module

new_state = traverse_module(submodule, new_acc, update_cb, target_types)


 "/Users/jxiong/Documents/Projects/ipsc_gplvm/env/lib/python3.6/site-packages/gpflow/utilities/utilities.py", line 324, in traverse_module

new_state = traverse_module(submodule, new_acc, update_cb, target_types)


 "/Users/jxiong/Documents/Projects/ipsc_gplvm/env/lib/python3.6/site-packages/gpflow/utilities/utilities.py", line 303, in traverse_module

return update_cb(m, path, state)


 "/Users/jxiong/Documents/Projects/ipsc_gplvm/env/lib/python3.6/site-packages/gpflow/utilities/utilities.py", line 247, in clear_bijector

clear_cache(bijector)


 "/Users/jxiong/Documents/Projects/ipsc_gplvm/env/lib/python3.6/site-packages/gpflow/utilities/utilities.py", line 243, in clear_cache

b._from_x.clear()
AttributeError: 'Softplus' object has no attribute '_from_x'
