<script>
if (window.testRunner)
    testRunner.dumpAsText();
</script>
<style>
.test {
    position: absolute;
    box-sizing: border-box;
    left: 0px;
    right: 0px;
    margin-left: 200px;
    border-radius: 10px;
    border: 2px solid red;
    height: 10px;
}
.container {
    position: relative;
    width: 100px;
    height: 100px;
    border: 2px solid blue;
    will-change:transform;
}
</style>
<div class="container">
<div class="test">
This test passes if it doesn't hang.
</div>
</div>