GNU bug report logs - #37856
27.0.50; 'next-error' advised with 'recenter' signals error when run from "*grep*" buffer

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Message #22 received at 37856 <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: Stefan Kangas <stefan <at> marxist.se>
Cc: 37856 <at> debbugs.gnu.org
Subject: Re: bug#37856: 27.0.50; 'next-error' advised with 'recenter' signals
 error when run from "*grep*" buffer
Date: Tue, 22 Oct 2019 05:28:07 +0300

> From: Stefan Kangas <stefan <at> marxist.se>
> Date: Mon, 21 Oct 2019 22:11:50 +0200
> Cc: 37856 <at> debbugs.gnu.org
> 
> It was surprising to me that this didn't work, and it's not clear what
> I should do instead.  For example, the following code exhibits the
> same problem:
> 
> (defun my-next-error ()
>   (interactive)
>   (next-error)
>   (recenter))
> 
> What am I missing?

The advice effectively "injects" your code into the advised function,
just before it returns.

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