ladybird/Tests/LibWeb/Text/input/window-proxy-property-inline-cache.html

<script src="include.js"></script>
<script>
    test(() => {
        function ic(o) {
            return o.foo
        }

        window.foo = 123
        println(ic(window))
        delete window.foo
        println(ic(window))
    });
</script>