v8Js segfault with nested callbacks

gistfile1.aw

<?php
$v8=new v8Js('SERVER');
$v8->serverCb = function($cb) { return call_user_func_array($cb, array(1,2,3))."42"; };
$v8->log = function($msg) { print $msg; };
for ($i =0; $i < 10; ++$i) {
$v8->executeString("var res = SERVER.serverCb(function() {return 'fromJSCB' }); SERVER.log(res); ");
}