Strange behavior.

I have been using the latest version of Yaf on xampp and i kept running into issues on the errorController at first i assumed it may of been a memory leak but then i think i pinpointed the issue:

object(Yaf_Exception_LoadFailed_Action)#13 (8) {
  ["string":"Exception":private]=>
  string(0) ""
  ["file":protected]=>
  string(29) "C:\xampp\htdocs\dev\index.php"
  ["line":protected]=>
  int(13)
  ["trace":"Exception":private]=>
  array(1) {
    [0]=>
    array(6) {
      ["file"]=>
      string(29) "C:\xampp\htdocs\dev\index.php"
      ["line"]=>
      int(13)
      ["function"]=>
      string(3) "run"
      ["class"]=>
      string(15) "Yaf_Application"
      ["type"]=>
      string(2) "->"
      ["args"]=>
      array(0) {
      }
    }
  }
  ["message":protected]=>
  string(49) "There is no method indexAction in IndexController"
  ["code":protected]=>
  int(517)
  ["previous":protected]=>
  NULL
  ["previous":"Exception":private]=>
  &UNKNOWN:0
}

I believe the issue is &UNKNOWN:0, i checked a normal exception and when there is no previous the value is null so i made the change below and tested it and shows null as expected.