message: Prepare //tensorflow/python:function_def_to_graph_test for Tensor equality.
diff: @@ -348,7 +348,7 @@ def _uniquify_fetches(fetch_mappers):
  """
  unique_fetches = []
  value_indices = []
  - seen_fetches = {}
  + seen_fetches = object_identity.ObjectIdentityDictionary()
  for m in fetch_mappers:
  m_value_indices = []
  for f in m.unique_fetches():
  