<!DOCTYPE html>
<html>
<head>
<style>
    .background-image {
        position: relative;
        margin-top: -1px;
        height: 0;
        padding-bottom: 80%;
        opacity: 0.1;
    }

    .tile {
        animation: fade-in 0.4s;
    }

    @keyframes fade-in {
        from { opacity: 0; }
        to   { opacity: 1; }
    }

</style>
<script>
    if (window.testRunner)
        testRunner.dumpAsText();
</script>
</head>
<body>
    <div class="tile">
        <div class="background-image"></div>
        <p>This test should not crash or assert.</p>
    </div>
</body>
</html>