Are array 'length' properties really configurable?

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


Given that 15.4.5.2 makes arrays' length properties non-configurable, it 
seems to me that all the care taken in step three of the custom 
[[DefineOwnProperty]] method in 15.4.5.1 is to no avail, as the default 
[[DefineOwnProperty]] will refuse to make any changes anyway.

I've filed a Trac ticket for this:
http://bugs.ecmascript.org/ticket/473



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