GNU bug report logs - #62009
29.0.60; Emacs crashes on setf symbol-name

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Message #29 received at 62009 <at> debbugs.gnu.org (full text, mbox):

From: Augusto Stoffel <arstoffel <at> gmail.com>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: michael_heerdegen <at> web.de, mail <at> daniel-mendler.de,
 Philip Kaludercic <philipk <at> posteo.net>, monnier <at> iro.umontreal.ca,
 62009 <at> debbugs.gnu.org
Subject: Re: bug#62009: 29.0.60; Emacs crashes on setf symbol-name
Date: Fri, 10 Mar 2023 09:47:33 +0100

On Fri, 10 Mar 2023 at 09:45, Augusto Stoffel wrote:

> On Fri, 10 Mar 2023 at 09:11, Eli Zaretskii wrote:
>
>>> Is it not possible to detect this before the illegal memory access, and
>>> raise a signal in Emacs Lisp?
>>
>> It won't be easy, if at all possible.  And I'm not sure we even want
>> to do that.  What would be the purpose of supporting such a use of
>> Emacs?
>
> What is the purpose of supporting mutation of symbol names in general?
>
>   (aset (symbol-name 'find-file) 1 ?o)
>   (fboundp 'find-file)
>   => nil
>
> This one doesn't crash Emacs, but wreaks havoc, maybe in even worse
> ways.

(To clarify, I think this of course should raise a signal.)

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