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function f(x) {
this["__proto__"] = x;
let tmp = this.toString;
assertEq(x === null, tmp === void 0);
}
for (let e of [[], null, []]) {
new f(e);
}
function f(x) {
this["__proto__"] = x;
let tmp = this.toString;
assertEq(x === null, tmp === void 0);
}
for (let e of [[], null, []]) {
new f(e);
}