[Webkit-unassigned] [Bug 142933] New: 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

            Bug ID: 142933
           Summary: Redefining a property should not change its insertion
                    index (Object.keys order)
    Classification: Unclassified
           Product: WebKit
           Version: 528+ (Nightly build)
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: JavaScriptCore
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: joepeck at webkit.org
                CC: ggaren at apple.com

* SUMMARY
Redefining a property should not change its index in Object.keys.

* TEST:
var o = {};
o.x = 1;
o.y = 2;
o.__defineGetter__("x", function() {});
Object.keys(o);

* EXPECTED
["x", "y"]

* ACTUAL
["y", "x"]

* NOTES
- Firefox outputs expected
- Chrome outputs expected

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