TYPO3 Core

I tried to open BE module>info>linkvalidator in t3 trunk using linkvalidator trunk

Fatal error: require_once() [function.require]: Failed opening required '/opt/lampp/htdocs/t3_playground/dummy/typo3/sysext/linkvalidator/lib/class.tx_linkvalidator_checkinternallinks.php' (include_path='.:/opt/lampp/lib/php') in /home/spieler/t3_playground/t3_trunk/t3lib/class.t3lib_div.php on line 5606
Call Stack

1. Time Memory Function Location
   1 0.0015 377716 {main}( ) ../index.php:0
   2 0.5067 13397052 SC_mod_web_info_index->main( ) ../index.php:231
   3 0.5575 13477360 t3lib_SCbase->extObjContent( ) ../index.php:137
   4 0.5576 13477332 tx_linkvalidator_modfunc1->main( ) ../class.t3lib_scbase.php:385
   5 0.5604 13477464 tx_linkvalidator_modfunc1->initialize( ) ../class.tx_linkvalidator_modfunc1.php:61
   6 0.5604 13477508 t3lib_div::getUserObj( ) ../class.tx_linkvalidator_modfunc1.php:108
   7 0.5610 13477908 t3lib_div::requireOnce( ) ../class.t3lib_div.php:5329

oviously the folder lib does not exists