[Webkit-unassigned] [Bug 135879] iOS 8 beta 5 Set forEach sometimes triggers wrong number of times

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=135879





--- Comment #2 from Oliver Hunt <oliver at apple.com>  2014-08-14 09:23:02 PST ---
What happens if you replace forEach with an equivalent:

Map.prototype.forEach = function forEach(fn /* , thisArg */) {
    for (var {key, value} of this)
        fn.call(arguments[1], key, value /*, this -- whoops should jsc be passing this? eep */)
}

(e.g. do we screw up general case iteration, or is this something specific to foreach's internal implementation? - also if it does work that would provide something of a workaround.  I'm also wondering if you're mutating the map while iterating?)

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