GNU bug report logs - #79225
30.1; Success and abort callbacks are shared across different invocations of string-edit

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From: help-debbugs <at> gnu.org (GNU bug Tracking System)
To: Piyush Srivastava <piyush.srivastava <at> tifr.res.in>
Subject: bug#79225: closed (Re: bug#79225: 30.1; Success and abort
 callbacks are shared across different invocations of string-edit)
Date: Wed, 13 Aug 2025 12:14:02 +0000

[Message part 1 (text/plain, inline)]

Your bug report

#79225: 30.1; Success and abort callbacks are shared across different invocations of string-edit

which was filed against the emacs package, has been closed.

The explanation is attached below, along with your original report.
If you require more details, please reply to 79225 <at> debbugs.gnu.org.

-- 
79225: https://debbugs.gnu.org/cgi/bugreport.cgi?bug=79225
GNU Bug Tracking System
Contact help-debbugs <at> gnu.org with problems

[Message part 2 (message/rfc822, inline)]

From: Eli Zaretskii <eliz <at> gnu.org>
To: Piyush Srivastava <piyush.srivastava <at> tifr.res.in>
Cc: 79225-done <at> debbugs.gnu.org
Subject: Re: bug#79225: 30.1;
 Success and abort callbacks are shared across different invocations
 of string-edit
Date: Wed, 13 Aug 2025 15:12:51 +0300

> Date: Wed, 13 Aug 2025 07:57:25 +0530
> From: Piyush Srivastava <piyush.srivastava <at> tifr.res.in>
> 
> There is an error in my bug-report:  the string-edit function uses 
> setq-local,  Thus, the callbacks indeed become buffer local when they 
> are assigned, so the problem I was worried about should not occur.  I 
> just got confused because the variables that store these callbacks are 
> declared using defvar rather than defvar-local, even though they are 
> intended for buffer-local use.

Thanks, I'm therefore closing this non-bug.

[Message part 3 (message/rfc822, inline)]

From: Piyush Srivastava <piyush.srivastava <at> tifr.res.in>
To: bug-gnu-emacs <at> gnu.org
Subject: 30.1; Success and abort callbacks are shared across different
 invocations of string-edit
Date: Tue, 12 Aug 2025 12:28:05 +0530

The function `string-edit' uses variables
`string-edit--success-callback' and `string-edit--abort-callback' to
store callbacks to be called on successful completion and abort
respectively.  However, these variables are declared using `defvar' and
not using `defvar-local', so it looks like they are shared across
different concurrent invocations of `string-edit' (e.g., if, while a
`string-edit' buffer is active, a user goes to another buffer and
invokes another command calling `read-string-from-buffer' from that
buffer).   Is this the intended behaviour?


In GNU Emacs 30.1 (build 2, x86_64-pc-linux-gnu, GTK+ Version 3.24.41,
 cairo version 1.18.0) of 2025-02-25 built on OptiPlex-7440-AIO
Windowing system distributor 'The X.Org Foundation', version 11.0.12302006
System Description: Ubuntu 24.04.2 LTS

Configured using:
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