anchor.diff:                  {NewStateData2, {ok, ReqId}} ->
                       {next_state, waiting_object_list,
                        NewStateData2#state{object_list_req_id=ReqId}};
  -                {NewStateData2, {error, _Reason}}=Error ->
  +                {NewStateData2, {error, _Reason}=Error} ->
                       try_reply(Error, NewStateData2)
               end
       end.
  
positive.code: 
  -spec update_profiling_state_with_start(state(), StartKey :: binary(),
                                          EndKey :: binary(),
                                          StartTime :: float()) ->
      state().
  update_profiling_state_with_start(State=#state{profiling=Profiling},
                                    StartKey, EndKey, StartTime) ->
  
negative.code:         {NewStateData, {ok, ReqId}} ->
              {next_state, waiting_object_list,
               NewStateData#state{object_list_req_id=ReqId}};
          {NewStateData, {error, _Reason}=Error} ->
              try_reply(Error, NewStateData)
      end.
  
  