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Re: Warnings about keymaps

From: Stefan Monnier
Subject: Re: Warnings about keymaps
Date: Fri, 11 Sep 2009 13:43:25 -0400
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/23.1.50 (gnu/linux)

> Compilation of Lisp files yields warnings such as these two:
>     Compiling emacs/lisp/cvs-status.el

>     In toplevel form:
>     emacs/lisp/cvs-status.el:93:22:Warning: variable assignment to constant
>       `cvs-status-mode-map'
>     Compiling emacs/lisp/diff-mode.el

>     In toplevel form:
>     emacs/lisp/diff-mode.el:1273:70:Warning: variable assignment to
>       constant `diff-mode-map'

> Sounds like a bug to me.

Yes, there's some kind of bug in there.  The bug can be seen more
directly by byte-compiling the file below:

   (defconst foo nil)
   (defvar foo nil)

Looks like the "assignment-to-constant" warning should be more careful
to distinguish defvar from setq.


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