Hello, I found a bug of new RegExp, (new RegExp('')).toString() should return not '//' but '/(?:)/'.
I confirmed this bug using following revision: changeset: 0532397d0732 date: Mon Jul 29 18:07:20 2013 +0530 summary: 8012792: print function defined in engine.js does not handle multiple arguments Reviewed-by: hannesw http://ecma-international.org/ecma-262/5.1/#sec-15.10.4.1 Thanks, --gocho twitter.com/gocho