Bug 295485 – [JSC] Fix order of function's special properties returned by Object.keys` / `Object.entries`

• Status: RESOLVED
• Resolution: FIXED
• Component: JavaScriptCore

[Sosuke Suzuki]

According to the specification, `OrdinaryOwnPropertyKeys` called by
    `Object.keys` or `Object.entries` on function objects should return
    properties in ascending chronological order[1]. This order should not
    be affected by `Object.defineProperty`. Therefore, when the `length`
    and `name` properties of function objects are enumerable, they should
    always come first.
    
    However, in the current JSC implementation, they come last. This patch
    fixes this behavior.
    
    Note that the `prototype` property doesn't need to be considered here
    as it is not configurable[2].
    
    [1]: https://tc39.es/ecma262/#sec-ordinaryownpropertykeys
    [2]: https://tc39.es/ecma262/#sec-function-instances

[Sosuke Suzuki]

Pull request: https://github.com/WebKit/WebKit/pull/47626

[EWS]

Committed 297260@main (1f495933fd51): <https://commits.webkit.org/297260@main>

Reviewed commits have been landed. Closing PR #47626 and removing active labels.

[Radar WebKit Bug Importer]

<rdar://problem/155607661>