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Re: Package cl is deprecated

From: Hongyi Zhao
Subject: Re: Package cl is deprecated
Date: Wed, 28 Jul 2021 21:41:03 +0800

On Wed, Jul 28, 2021 at 7:20 PM Leo Butler <> wrote:
> >>>> On 28/07/2021 11:23, Hongyi Zhao wrote:
> >>>>> When I start Emacs, I always notice the following message in *Messages* 
> >>>>> buffer:
> >>>>>
> >>>>> Package cl is deprecated
> >>>>>
> >>>>> Any hints for eliminating it?
> Put something like
> (debug-on-message "Package cl is deprecated")

I tried this method, but meet the following warning:

Warning (initialization): An error occurred while loading

Symbol's function definition is void: debug-on-message

> at the top of your .emacs file, then start a fresh emacs instance.
> Ref.
> (Info-index "debug-on-message")

`M-: (Info-index "debug-on-message") RET':

Debugger entered--Lisp error: (error "No index")
  signal(error ("No index"))
  error("No index")
  eval((Info-index "debug-on-message") t)
  eval-expression((Info-index "debug-on-message") nil nil 127)
  funcall-interactively(eval-expression (Info-index
"debug-on-message") nil nil 127)
  call-interactively(eval-expression nil nil)

Assoc. Prof. Hongyi Zhao <>
Theory and Simulation of Materials
Hebei Vocational University of Technology and Engineering
No. 473, Quannan West Street, Xindu District, Xingtai, Hebei province

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