Are the default Symbol.species accessors intended to be configurable?

Kevin Smith zenparsing at
Wed Feb 10 19:29:30 UTC 2016

> Is this a correct reading of the spec? Is this a bug in the spec?
> tests
> that the RegExp[Symbol.species] property is configurable. Additionally, it
> appears to break at least one major webpage if RegExp[Symbol.species] is
> not configurable.

Check out the last two paragraphs of,
 which specifies the default property attributes for the standard built-ins.
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