Comment #10 on issue 1818 by kpreid.switchb.org: ++, --, += ignore
frozenness under v8
http://code.google.com/p/google-caja/issues/detail?id=1818
Confirmed above — but now I find that I cannot reproduce it in _strict_
mode.
(function() {
function f(o) { o.x++ }
return (function() {
var o = {x: 5}
Object.freeze(o);
o.x === 5;
for (var i = 0; i < 10000; i++) {try { f(o); } catch (e) {} }
return o.x;
})();
})();
The above yields 9743, but if I add a strict declaration to the outer
function, it yields 5.
If this genuinely is non-strict only, then there is no problem for Caja.
(Re the complexities of the above — the try-catch is needed to deal with
expected strict assignment failures. The inner function seems to be needed,
possibly to keep the optimized function's context simple enough for
optimization?
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