src/third_party/mozjs-45/js/src/jit-test/tests/ion/bug735869.js

o = {}
for (let i = 0; i < 70; i++) {
    try {
        p
    } catch (e) {}
    (function() {
        for (x in Iterator.prototype) {}
    })()
    o.__proto__ = null
    delete o.__proto__
}