// trigger gc
function gc() {
    for (var i = 0; i < 0x10; i++) {
    new ArrayBuffer(0x1000000);
    }
}

function f() {
    class A { ['a'] () {} };
    let a = A.prototype.a;
    a[1024] = 1337;
    a.a = 1.1;
    a.b = 1.1;
}

f();
gc();
f();