Are array 'length' properties really configurable?

Jim Blandy jimb at
Wed Aug 25 11:49:07 PDT 2010

Given that makes arrays' length properties non-configurable, it 
seems to me that all the care taken in step three of the custom 
[[DefineOwnProperty]] method in is to no avail, as the default 
[[DefineOwnProperty]] will refuse to make any changes anyway.

I've filed a Trac ticket for this:

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