[Webkit-unassigned] [Bug 54289] New: Object.defineProperty does not override existing properties

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=54289

           Summary: Object.defineProperty does not override existing
                    properties
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Macintosh Intel
        OS/Version: Mac OS X 10.6
            Status: UNCONFIRMED
          Severity: Normal
          Priority: P2
         Component: JavaScriptCore
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: lists at scratchdisk.com


Even if configurable: true was provided at definition time:

var obj = {};

Object.defineProperty(obj, 'test', { value: 10, configurable: true });

alert(obj.test); // 10

Object.defineProperty(obj, 'test', { value: 20, configurable: true });

alert(obj.test); // Should be 20, is still 10

The workaround is to call delete before the 2nd definition:

delete obj.test;

But it seems this contradicts the specifications. Or am I misinterpreting them?

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