Index: lisp/emacs-lisp/advice.el
===================================================================
RCS file: /sources/emacs/emacs/lisp/emacs-lisp/advice.el,v
retrieving revision 1.49
diff -B -w -c -r1.49 advice.el
*** lisp/emacs-lisp/advice.el	21 Jan 2007 02:44:24 -0000	1.49
--- lisp/emacs-lisp/advice.el	8 Mar 2007 18:04:43 -0000
***************
*** 2278,2284 ****
    "Read a complete function/class/name specification from minibuffer.
  The list of read symbols will be returned.  The optional PROMPT will
  be used to prompt for the function."
!   (let* ((function (ad-read-advised-function prompt))
  	 (class (ad-read-advice-class function))
  	 (name (ad-read-advice-name function class)))
      (list function class name)))
--- 2278,2288 ----
    "Read a complete function/class/name specification from minibuffer.
  The list of read symbols will be returned.  The optional PROMPT will
  be used to prompt for the function."
!   (let* ((predicate (lambda (fun)
! 		      (ad-dolist (class ad-advice-classes)
! 			(if (ad-get-advice-info-field fun class)
! 			    (ad-do-return t)))))
! 	 (function (ad-read-advised-function prompt predicate))
  	 (class (ad-read-advice-class function))
  	 (name (ad-read-advice-name function class)))
      (list function class name)))
Index: lisp/ChangeLog
===================================================================
RCS file: /sources/emacs/emacs/lisp/ChangeLog,v
retrieving revision 1.10783
diff -C0 -r1.10783 ChangeLog
*** lisp/ChangeLog	7 Mar 2007 12:50:23 -0000	1.10783
--- lisp/ChangeLog	8 Mar 2007 18:05:05 -0000
***************
*** 0 ****
--- 1,6 ----
+ 2007-03-08  Michaël Cadilhac  <michael@cadilhac.name>
+ 
+ 	* emacs-lisp/advice.el (ad-read-advice-specification): Check that the
+ 	default value taken by `ad-read-advised-function' has non-empty
+ 	classes.
+