Added new cyclic reference test
Added new cyclic reference test

nimishzynga/php-igbinary,phadej/igbinary,derickr/igbinary,Sean-Der/igbinary,Sean-Der/igbinary,ZeusbaseWeb/igbinary,Jan-E/igbinary,Jan-E/igbinary,derickr/igbinary,nimishzynga/php-igbinary,Jan-E/igbinary,Jan-E/igbinary,phadej/igbinary,igbinary/igbinary7,yiliaofan/igbinary,igbinary/igbinary7,nimishzynga/php-igbinary,igbinary/igbinary7,Jan-E/igbinary,ZeusbaseWeb/igbinary,nimishzynga/php-igbinary,yiliaofan/igbinary,igbinary/igbinary7,Sean-Der/igbinary,phadej/igbinary,ZeusbaseWeb/igbinary,derickr/igbinary,yiliaofan/igbinary,igbinary/igbinary7