GNU bug report logs - #61102
28.1; with-selected-window/save-window-excursion calls buffer-list-update-hook only once

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Message #8 received at 61102 <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: Al Haji-Ali <abdo.haji.ali <at> gmail.com>, martin rudalics <rudalics <at> gmx.at>
Cc: 61102 <at> debbugs.gnu.org
Subject: Re: bug#61102: 28.1; with-selected-window/save-window-excursion calls
 buffer-list-update-hook only once
Date: Thu, 02 Feb 2023 12:22:53 +0200

> From: Al Haji-Ali <abdo.haji.ali <at> gmail.com>
> Date: Fri, 27 Jan 2023 18:29:06 +0000
> 
> 
> The following code:
> 
> --8<---------------cut here---------------start------------->8---
> 
> (let ((fn (lambda () (message "Buffer changed: %S" (current-buffer)))))
>   (add-hook 'buffer-list-update-hook fn)
>   (with-selected-window (minibuffer-window)  
>     (save-window-excursion nil) nil)
>   (remove-hook 'buffer-list-update-hook fn)
>   nil)
>   
> --8<---------------cut here---------------end--------------->8---
> 
> Prints "Buffer changed: #<buffer  *Minibuf-0*>" once, even though the selection should return to the currently selected buffer (which is different from the mini-buffer).
> 
> I would expect either that the hook 'buffer-list-update-hook is not called at all, or that it is called twice (one time for every change of the selected buffer).

Martin, any comments on this?  FWIW, I'm not sure this is a bug, but
maybe I'm missing something.

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