Thanks for trying to reproduce, it could be my system.
# php -v
PHP 5.3.3 (cli) (built: Jul 9 2015 15:04:50)
Copyright (c) 1997-2010 The PHP Group
Zend Engine v2.3.0, Copyright (c) 1998-2010 Zend Technologies
with XCache v3.0.4, Copyright (c) 2005-2013, by mOo
with XCache Optimizer v3.0.4, Copyright (c) 2005-2013, by mOo
with XCache Cacher v3.0.4, Copyright (c) 2005-2013, by mOo
with XCache Coverager v3.0.4, Copyright (c) 2005-2013, by mOo