zendframework/zf2 — pull request #4929 by mtougeron (2013-08-05 20:00:02+00:00)
Title: Add Zend\Uri as a suggest because it is required by the Uri & Sitemap\Loc validator

If you don't have Zend\Uri installed and try to use Zend\Validator\Uri or Zend\Validator\Sitemap\Loc it will give you a fatal PHP error.