<!DOCTYPE html>

<html>
<head>
  <style type="text/css" media="screen">
    .box {
      width: 100px;
      height: 100px;
      background-color: blue;
      transform: translateZ(0);
    }
    
  </style>
</head>
<body>
  <div class="box"></div>
  <p><a href="https://bugs.webkit.org/show_bug.cgi?id=43167">https://bugs.webkit.org/show_bug.cgi?id=43167</a><br>
    You should not hit an assertion if you load this file in a tab, then switch back and forth between other tabs.</p>
</body>
</html>