third_party/blink/web_tests/fast/ruby/add-text-to-block-ruby-with-after-pseudo-crash.html - chromium/src - Git at Google

 <!DOCTYPE html>
 <style>
     ruby::after {
         display: block;
         content: "";
     }
     ruby {
         display: block;
     }
 </style>

 <script>
 if (window.testRunner)
     testRunner.dumpAsText();

 onload = function() {
     var ruby = document.createElement('ruby');
     document.body.appendChild(ruby);
     document.body.offsetTop;
     ruby.appendChild(document.createTextNode('Passed if this test did not crash or assert.'));
 }
 </script>
	<!DOCTYPE html>
	<style>
	ruby::after {
	display: block;
	content: "";
	}
	ruby {
	display: block;
	}
	</style>

	<script>
	if (window.testRunner)
	testRunner.dumpAsText();

	onload = function() {
	var ruby = document.createElement('ruby');
	document.body.appendChild(ruby);
	document.body.offsetTop;
	ruby.appendChild(document.createTextNode('Passed if this test did not crash or assert.'));
	}
	</script>