ZF-11952: Zend_Validate_Hostname should instantiate Zend_Validate_Ip or completely ignore when not set
Currently Zend_Validate_Hostname does several calls on $this->_options['ip'] - whether set or not, resulting in fatal error "call to a member function on a non-object". In my opinion, a fatal error should always be prevented, so either set a default ip validator or ignore all portions where one would be needed.
The bug described at http://framework.zend.com/issues/browse/ZF-11239 is good enough to replicate the issue.
PHP 5.3.8 Zend Engine v2.3.0