JSTests/stress/super-force-ic-fail.js

let assert = (a) => {
    if (!a)
        throw Error("Bad Assertion");
}

let aObj =  {
    get foo() { return this.a; }
};

let obj = {
    jaz() {
        return super.foo;
    }
};
obj.a = "foo";

Object.setPrototypeOf(obj, aObj);

noInline(obj.jaz);

for (let i = 0; i < 10000; i++) {
    if (i == 9999) {
        delete aObj.foo;
        assert(obj.jaz() === undefined);
    } else {
        assert(obj.jaz() == "foo");
    }

}

let bObj =  {
    get foo() { return this.a; }
};

let obj2 = {
    foo() {
        return super.foo;
    }
};
obj2.a = "foo";

Object.setPrototypeOf(obj2, bObj);

noInline(obj.jaz);

for (let i = 0; i < 10000; i++) {
    if (i == 9999) {
        Object.defineProperty(bObj, "foo", {
            get: () => {return "boo"; }
        });
        assert(obj2.foo() == "boo");
    } else {
        assert(obj2.foo() == "foo");
    }
}