Faulty AssertionError in 1.1.0

[jamadden]

Module nti.app.renderers.rest:214 in render_externalizable
>>  body = to_json_representation_externalized(body)
Module nti.externalization.representation:108 in dump
>>  return simplejson.dumps(obj, **self._DUMP_ARGS)
Module simplejson:412 in dumps
>>  **kw).encode(obj)
Module simplejson.encoder:296 in encode
>>  chunks = self.iterencode(o, _one_shot=True)
Module simplejson.encoder:378 in iterencode
>>  return _iterencode(o, 0)
Module nti.externalization.representation:82 in _second_pass_to_external_object
>>  result = toExternalObject(obj, name='second-pass')
Module nti.externalization.externalization._externalizer:314 in nti.externalization.externalization._externalizer.to_external_object
Module nti.externalization.externalization._externalizer:396 in nti.externalization.externalization._externalizer.to_external_object
Module nti.externalization.externalization._externalizer:269 in nti.externalization.externalization._externalizer._to_external_object_state
Module nti.externalization.externalization._externalizer:236 in nti.externalization.externalization._externalizer._externalize_object
Module nti.externalization._datastructures:750 in nti.externalization._datastructures.InterfaceObjectIO.toExternalObject
Module nti.externalization._datastructures:271 in nti.externalization._datastructures.AbstractDynamicObjectIO.toExternalObject
Module nti.externalization._datastructures:240 in nti.externalization._datastructures.AbstractDynamicObjectIO.toExternalDictionary
Module nti.externalization.externalization._externalizer:314 in nti.externalization.externalization._externalizer.to_external_object
Module nti.externalization.externalization._externalizer:396 in nti.externalization.externalization._externalizer.to_external_object
Module nti.externalization.externalization._externalizer:247 in nti.externalization.externalization._externalizer._to_external_object_state
AssertionError: 

That line is assert object is not None. It's caused by not stripping primitives on 'second-pass' anymore; that's not actually needed, but was a temporary state on the way to #101 (for YAML, but that ended up being solved another way).