Comment #6 on issue 2779 by [email protected]: Frozenness ignored by
optimized ++/--
http://code.google.com/p/v8/issues/detail?id=2779
Correction/update — we can reproduce the bug in 29.0.1547.22 and
30.0.1574.0, but not in strict mode. Is there a way to do so? If it only
occurs in non-strict mode, we (Caja) can stop worrying about it.
This is the simplest thing I've found which both reproduces the bug and
runs in strict mode, but in strict mode it returns the correct 5:
(function() { "use strict":
function f(o) { o.x++ }
return (function() {
var o = {x: 5};
Object.freeze(o);
for (var i = 0; i < 10000; i++) {try { f(o); } catch (e) {} }
return o.x;
})();
})();
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