Status: New
Owner: ----
New issue 1310 by [email protected]:
Object.getOwnPropertyDescriptor/defineProperty should work on __proto__
http://code.google.com/p/v8/issues/detail?id=1310
var a = {};
var d = Object.getOwnPropertyDescriptor(a, "__proto__");
d.writable = false;
Object.defineProperty(a, "__proto__", d);
JSON.stringify(Object.getOwnPropertyDescriptor(a, "__proto__"));
On FF4:
"{"value":{},"writable":false,"enumerable":false,"configurable":false}"
On V8, getOwnPropertyDescriptor(o, "__proto__") returns undefined.
Interestingly, FF4 also allows setting __proto__ to be an accessor rather
than a property:
var a = {};
//var d = Object.getOwnPropertyDescriptor(a, "__proto__");
//d.writable = false;
d = { get: function() { return { m: 42 }; } };
Object.defineProperty(a, "__proto__", d);
JSON.stringify(Object.getOwnPropertyDescriptor(a, "__proto__"));
a.m; // undefined
a.__proto__.m; // 42
Object.getPrototypeOf(a).m; // undefined
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