message: [TF Ops] Bugfix to Operation initializer: error message uses node_def.
  self.node_def may not yet be accessible when using the C api.
diff: @@ -1618,7 +1618,7 @@ class Operation(object):
  for i, x in zip(inputs, input_types)):
  raise TypeError("In op '%s', input types (%s) are not compatible "
  "with expected types (%s)" %
  - (self.node_def.name, [i.dtype for i in inputs],
  + (node_def.name, [i.dtype for i in inputs],
  input_types))
  # Build the list of control inputs.
  