[Webkit-unassigned] [Bug 38639] New: Specifying attributes for an Array property causes the property not to be created

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=38639

           Summary: Specifying attributes for an Array property causes the
                    property not to be created
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: JavaScriptCore
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: kent.hansen at nokia.com


Creating a property whose name is a valid array index, and specifying one or
more attributes for that property, doesn't work.

>From JavaScript:

./jsc
> a = [];

> Object.defineProperty(a, "0", { value: 123, writable: false });

> a[0]
undefined

With C API:

JSObjectRef myArray = JSObjectMakeArray(context, 0, 0, 0);
JSStringRef zeroStr = JSStringCreateWithUTF8CString("0");
JSValueRef num = JSValueMakeNumber(context, 123);
JSObjectSetProperty(context, myArray, zeroStr, num,
kJSPropertyAttributeReadOnly, 0);
JSValueRef ret = JSObjectGetProperty(context, myArray, zeroStr, 0); // returns
undefined

In the C API case, passing 0 as attributes works as expected, but in the JS
case, removing "writable: false" doesn't actually help.

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