<!DOCTYPE html>

<html>
<head>
  <style>
    
    .container {
      opacity: 0.8;
      margin: 10px;
    }
    
    .filtered {
      width: 100px;
      height: 100px;
      background-color: blue;
      -webkit-filter: blur(10px);
    }
  </style>
</head>
<body>
  <a href="https://bugs.webkit.org/show_bug.cgi?id=76329">https://bugs.webkit.org/show_bug.cgi?id=76329</a>
  <p>Open this test in Safari, and hit Command-F to Find. A debug build should not assert.</p>
  <div class="container">
      <div class="filtered box"></div>
  </div>
</body>
</html>