LayoutTests/fast/dynamic/layer-no-longer-paginated.html - WebKit - Git at Google

 <body style="overflow: hidden;">
     <p>
         Test for <i><a href="rdar://problem/10098679">&lt;rdar://problem/10098679></a>
         Assertion failure in <tt>RenderLayer::paintPaginatedChildLayer()</tt></i>.
     </p>
     <p>
         The test passes if it does not cause an assertion failure or a crash.
     </p>
     <!-- specifying opacity < 1 so that the transition from having columns
          to not having columns does not cause the layer to go away -->
     <div id="target" style="-webkit-column-count:2; -webkit-column-fill:auto; column-count:2; column-fill:auto; opacity: 0.5; height: 20px;">
         <div style="position:relative;"></div>
     </div>
     <div id="widener" style="height: 10px; width: 200%;"></div>
     <script>
         function test()
         {
             document.getElementById("widener").style.removeProperty("width");
             document.getElementById("target").style.removeProperty("-webkit-column-count");
         }

                window.scrollBy(1, 0);

         if (window.testRunner) {
             testRunner.display();
             testRunner.dumpAsText();
             test();
         } else
             setTimeout(test, 500);

     </script>
 </body>
	<body style="overflow: hidden;">
	<p>
	Test for <i><a href="rdar://problem/10098679"><rdar://problem/10098679></a>
	Assertion failure in <tt>RenderLayer::paintPaginatedChildLayer()</tt></i>.
	</p>
	<p>
	The test passes if it does not cause an assertion failure or a crash.
	</p>
	<!-- specifying opacity < 1 so that the transition from having columns
	to not having columns does not cause the layer to go away -->
	<div id="target" style="-webkit-column-count:2; -webkit-column-fill:auto; column-count:2; column-fill:auto; opacity: 0.5; height: 20px;">
	<div style="position:relative;"></div>
	</div>
	<div id="widener" style="height: 10px; width: 200%;"></div>
	<script>
	function test()
	{
	document.getElementById("widener").style.removeProperty("width");
	document.getElementById("target").style.removeProperty("-webkit-column-count");
	}

	window.scrollBy(1, 0);

	if (window.testRunner) {
	testRunner.display();
	testRunner.dumpAsText();
	test();
	} else
	setTimeout(test, 500);

	</script>
	</body>