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// Setting a "new" prototype to the current [[Prototype]] value should never fail
var x = {}, t = Object.create(x);
Object.preventExtensions(t);
// Should not fail, because it is the same [[Prototype]] value
Object.setPrototypeOf(t, x);
// Object.prototype's [[Prototype]] is immutable, make sure we can still set null
Object.setPrototypeOf(Object.prototype, null);
reportCompare(true, true);