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// An object with a custom [Symbol.toPrimitive] function.
var key = {
value: "a",
[Symbol.toPrimitive]() {
return this.value;
}
};
var target = {
a: 0,
[Symbol.iterator]: 0,
};
var obj = new Proxy(target, {});
for (var i = 0; i < 100; ++i) {
// Change key[Symbol.toPrimitive] to return a symbol after some warm-up.
if (i > 80) {
key.value = Symbol.iterator;
}
// Attach an IC for JSOp::In on proxies.
assertEq(key in obj, true);
}