GNU bug report logs - #78180
31.0.50; Since ab71699e5f2, global value of post-command-hook is useless

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Package: emacs; Reported by: Ihor Radchenko <yantar92@HIDDEN>; Done: Eli Zaretskii <eliz@HIDDEN>; Maintainer for emacs is bug-gnu-emacs@HIDDEN.

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Date: Sat, 17 May 2025 11:04:15 +0300
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From: Eli Zaretskii <eliz@HIDDEN>
To: Ihor Radchenko <yantar92@HIDDEN>
In-Reply-To: <87cycr7ban.fsf@localhost> (message from Ihor Radchenko on Fri,
 02 May 2025 06:54:08 +0000)
Subject: Re: bug#78180: 31.0.50; Since ab71699e5f2, global value of
 post-command-hook is useless
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> From: Ihor Radchenko <yantar92@HIDDEN>
> Cc: Eli Zaretskii <eliz@HIDDEN>, 78180 <at> debbugs.gnu.org
> Date: Fri, 02 May 2025 06:54:08 +0000
> 
> Michael Heerdegen <michael_heerdegen@HIDDEN> writes:
> 
> > Just to be sure: you are aware that in the normal case the global hook
> > binding will always be executed (additionally), as long as the symbol t
> > is not removed from the local hook binding, as explained in
> > (info "(elisp) Setting Hooks")?
> 
> I was not aware! That's embarrassing.
> 
> Now, I see
> 
>      If the hook variable is buffer-local, the buffer-local variable
>      will be used instead of the global variable.  However, if the
>      buffer-local variable contains the element ‘t’, the global hook
>      variable will be run as well.
> 
> IMHO, that detail might look good in 24.1 Hooks section itself, as it
> appears to be important. But maybe it is just me who did not notice
> this.
> 
> In any case, there is no bug in what I reported. Just my
> misunderstanding. Feel free to close.

No further comments, so I'm now closing this bug.

Notification sent to Ihor Radchenko <yantar92@HIDDEN>:
bug acknowledged by developer. Full text available.

Reply sent to Eli Zaretskii <eliz@HIDDEN>:
You have taken responsibility. Full text available.