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#1764 — 15.4.3.4: Unnecessary call to ToObject


15.4.3.4 Array.prototype.concat ([ item1 [, item2 [, … ]]]), step 3.c.ii:

[[Construct]] is restricted to return objects, so the additional call to
ToObject() is not needed.


fixed in rev17 editor's draft


fixed in rev17, August 23, 2013 draft