gecko-dev/content/xml/document/crashtests/185285-1.xml

зеркало из https://github.com/mozilla/gecko-dev.git
<link xmlns="http://www.w3.org/1999/xhtml" href="some.css" rel="stylesheet" />
<x />
	`<link xmlns="http://www.w3.org/1999/xhtml" href="some.css" rel="stylesheet" />`
	`<x />`