Status: Accepted
Owner: [email protected]
CC: [email protected]
Labels: Type-Bug Priority-Medium
New issue 2164 by [email protected]: C++ builtin ArraySlice is not spec
conformant
http://code.google.com/p/v8/issues/detail?id=2164
It is expected to load property values with [[GetProperty]]
(http://es5.github.com/#x15.4.4.10) which should lead to prototype lookup
and execution of getters. Instead it apparently copies fast backing store
as is:
var i = 0;
Object.defineProperty(Array.prototype, "1", {get: function () { return ++i;
} });
var a = new Array(10); // 10 holes
assertTrue("1" in a);
assertFalse(a.hasOwnProperty("1"));
assertFalse(a[1] === a[1]);
var v = a[1];
assertEquals(i, v);
var b = a.slice();
assertTrue("1" in b);
assertTrue(b.hasOwnProperty("1"));
assertTrue(b[1] === b[1]);
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