[Webkit-unassigned] [Bug 142933] Redefining a property should not change its insertion index (Object.keys order)

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=142933

--- Comment #2 from Joseph Pecoraro <joepeck at webkit.org> ---
Relevant parts of the spec are:

https://people.mozilla.org/~jorendorff/es6-draft.html#sec-validateandapplypropertydescriptor
- [[DefineOwnProperty]] -> ValidateAndApplyPropertyDescriptor -> "Convert the property ... from a data property to an accessor property"

https://people.mozilla.org/~jorendorff/es6-draft.html#sec-ordinary-object-internal-methods-and-internal-slots-ownpropertykeys
- [[OwnPropertyKeys]] -> enumerates indexes, properties "in property creation order", and Symbols in proprty creation order

Though __defineGetter__ and __defineSetter__ are not specced, this should be no different then a Object.defineProperty changing a data descriptor to an accessor (and vice versa).

Now lets see if there is a JSC internal reason for the property deletion.

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