Can't define Hyper-, modifier in Emacs current

[HAMANO Kiyoto]

Hi emacs-developpers

I tried to define(eval) following codes.

  (global-set-key [(super ,)] '(lambda () (interactive) (message "hello")))

As a result, I got a following error message.

  Debugger entered--Lisp error: (invalid-read-syntax ")")

Is this a bug? Or, Was specification changed?

;; My environment:
;;   Emacs 24.0.50 (12/17)
;;   Debian GNU/Linux sid

Thanks.
-- 
HAMANO Kiyoto
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