ladybird/Libraries/LibJS/Tests/builtins/Proxy/iterate-over-proxy.js

test("iterate over bogus proxy", () => {
    expect(() => {
        let proxy = new Proxy([123], {
            getOwnPropertyDescriptor: function (p) {
                return undefined;
            },
        });

        for (const p in proxy) {
        }
    }).toThrow();
});