Re: Observability of NaN distinctions — is this a concern?

Sam Tobin-Hochstadt samth at
Tue Mar 26 08:48:42 PDT 2013

On Tue, Mar 26, 2013 at 3:54 AM, Mark S. Miller <erights at> wrote:

>     // The [[DefineProperty]] algorithm is allowed to overwrite

While I agree with you on the larger point (and this issue reoccurs
with proxies), the actual problem here is that [[DefineProperty]]
should just do nothing on immutable data.  The idea of mutating
immutable data as long as its the same value is crazy.


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