anchor.diff:      case [list_to_binary(couch_httpd:unquote(Part))
               || Part <- string:tokens(FilterName, "/")] of
       [] ->
  -        fun(#doc_info{revs=Revs}) ->
  +        fun(_Db2, #doc_info{revs=Revs}) ->
                   builtin_results(Style, Revs)
           end;
       [DName, FName] ->
  
positive.code:                     [DocInfo#doc_info{revs=[Rev]}|| Rev <- DocInfo#doc_info.revs]
                  end,
                  Docs = [Doc || {ok, Doc} <- [
                          couch_db:open_doc(Db, DocInfo2, [deleted, conflicts])
                              || DocInfo2 <- DocInfos]],
  
                  {ok, Passes} = couch_query_servers:filter_view(
                      DDoc, VName, Docs
                  ),
  
negative.code: changes_enumerator(DocInfo, Acc) ->
      #changes_acc{
          filter = FilterFun, callback = Callback, prepend = Prepend,
          user_acc = UserAcc, limit = Limit, resp_type = ResponseType, db = Db
      } = Acc,
      #doc_info{high_seq = Seq} = DocInfo,
      Results0 = FilterFun(Db, DocInfo),
      Results = [Result || Result <- Results0, Result /= null],
      Go = if (Limit =< 1) andalso Results =/= [] -> stop; true -> ok end,
      case Results of
  