anchor.diff:           close/1,
            call/3,
            concat/2,
  +	 dump_table/2,
            getfield/3,
            getglobal/2,
            gettop/1,
  
positive.code:     
  concat(L, N) ->
      command(L, {?ERL_LUA_CONCAT, N}).
  
  getfield(L, global, Name) ->
      getglobal(L, Name);
  
negative.code:             {other, Other}
      after ?STD_TIMEOUT ->
          {error, timeout}
      end.
  