Status: New
Owner: ----
New issue 687 by [email protected]: Object.defineProperty problems with
redefining accessor properties in some situations.
http://code.google.com/p/v8/issues/detail?id=687
v8 version 2.2.4.2 (static embedded in node.js 0.1.92)
---- Case 1
var lazy = { get x () {}, set x (v) { Object.defineProperty(this, "x",
{value: v}); } };
sys.puts(lazy.x);
lazy.x = 4;
sys.puts(lazy.x);
Works fine:
undefined
4
==== Case 2 (same as case 1, but created indirectly)
var lazy = Object.create(null, {x: {
get: function () {},
set: function (v) { Object.defineProperty(this, "x", {value: v}); }
}});
sys.puts(lazy.x);
lazy.x = 4;
sys.puts(lazy.x);
Crashes:
undefined
TypeError: Cannot redefine property: defineProperty
at Function.defineProperty (native)
at [object Object].<anonymous>
(/usr/home/herby/storage/usecase.js:8:30)
...
(usecase:8:30 is Object.[here]defineProperty in setter line)
==== Case 3 (case 1 wrapped in Object.create)
var lazy = {get value() {}, set value(v) { Object.defineProperty(this,
"value", {value: v}); }};
var l2 = Object.create(lazy);
sys.puts(l2.value);
try { l2.value = 4; } catch (e) { sys.puts(e); }
sys.puts(l2.value);
Crashes (try catch because otherwise exception is swallowed):
undefined
RangeError: Maximum call stack size exceeded
undefined
(it seems Object.definePrototype calls setter instead of redefining)
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