gecko-dev/layout/forms/crashtests/682684.xhtml

зеркало из https://github.com/mozilla/gecko-dev.git
<html xmlns="http://www.w3.org/1999/xhtml">
<span style="mask: url(682684-binding.xml#a);"/>
</html>
	`<html xmlns="http://www.w3.org/1999/xhtml">`
	`<span style="mask: url(682684-binding.xml#a);"/>`
	`</html>`