Changed the triggering of an exception.
Changed the triggering of an exception.

Using a faulty UTF-string didn't work on PHP 5.4.

keesschepers/concurrent-spider-bundle,lkalinka/concurrent-spider-bundle,Breuls/concurrent-spider-bundle,Breuls/concurrent-spider-bundle,lkalinka/concurrent-spider-bundle,lkalinka/concurrent-spider-bundle,Breuls/concurrent-spider-bundle,keesschepers/concurrent-spider-bundle,keesschepers/concurrent-spider-bundle