anchor.diff:  
   handle_cast({{remove_deleted, Url}, ReplyTo}, #state{url_cache = Deleted} = S) ->
       DeletedU = gb_sets:delete_any(Url, Deleted),
  -    handle_cast({{put, gb_sets:to_list(DeletedU)}, ReplyTo},
  -                S#state{url_cache = false}).
  +    handle_cast({{put, gb_sets:to_list(DeletedU)}, ReplyTo}, S).
   
   handle_call(dbg_get_state, _, S) ->
       {reply, S, S};
  
positive.code:             end,
              send_replies(ReplyTo, {ok, DestUrls}),
              {noreply,
               S#state{data = TagData, replicas = DestNodes},
               S#state.timeout};
          {error, _} = E ->
              send_replies(ReplyTo, E),
  
negative.code:                                                  OldUrls,
                                                   NoDup,
                                                   S#state.url_cache),
                      {noreply, NS, _} = handle_cast({{put, Merged}, ReplyTo}, S),
                      {noreply, NS#state{url_cache = Cache}, NS#state.timeout};
                  false ->
                      send_replies(ReplyTo, {error, invalid_url_object}),
                      {noreply, S, S#state.timeout}
  