layout/style/crashtests/1419554.html

   1 <script>
   2 function go() {
   3   a.attachShadow({ mode: "open" });
   4   a.appendChild(b);
   5 }
   6 </script>
   7 <body onload=go()>
   8 <div id="b"></div>
   9 <div id="a"></div>