LayoutTests/fast/text/stale-TextLayout-from-first-line.html

<style>
    div {
        width: 12ex;
        border: solid blue;
    }

    div::first-line {
        font-size: 200%;
    }
</style>
<div>
    xxxx xxxx xxxx xxxx xxxx xxxx &#x0300;
</div>