<style>
    :not(anything) { -webkit-user-modify: read-write }
</style>
<script>
    if (window.testRunner) { testRunner.dumpAsText() }
    function doStuff() {
        var s = document.getElementById("s");
        document.execCommand("selectAll", false);
        document.execCommand("strikeThrough", false);
        var style = s.style;
        document.execCommand("undo", false);
        style.setProperty("transform", "rotatez(0)");
    }
</script>
<body onload=doStuff()>
    <s id="s">This test passes if it does not crash.</s>
</body>