LayoutTests/fast/multicol/multicol-crazy-nesting.html - WebKit - Git at Google

 <head>
 <script>
 if (window.testRunner)
         testRunner.dumpAsText();
 </script>
 <style>
 * { -webkit-columns:3; -webkit-column-span:all }
 </style>
 </head>
 This test passes if it doesn't crash.
 <span>
 <div style="float:left">
 <div></div>
	<head>
	<script>
	if (window.testRunner)
	testRunner.dumpAsText();
	</script>
	<style>
	* { -webkit-columns:3; -webkit-column-span:all }
	</style>
	</head>
	This test passes if it doesn't crash.
	<span>
	<div style="float:left">
	<div></div>