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load(libdir + "asserts.js");
// Throw a TypeError if the trap sets a non-writable, non-configurable property
for (var key of ['foo', Symbol.for('quux')]) {
var target = {};
Object.defineProperty(target, key, {
value: 'bar',
writable: false,
configurable: false
});
var handler = { set: () => true };
for (let p of [new Proxy(target, handler), Proxy.revocable(target, handler).proxy])
assertThrowsInstanceOf(() => p[key] = 'baz', TypeError);
}
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