Possible regression in dired when renaming directories

Possible regression in dired when renaming directories

[Nicolas Martyanoff]

Hi,

I just updated from 27.2 to 28.1, and it seems a default behaviour has
changed. When renaming a directory in dired, either using 'R' or with
Wdired, buffers visiting files in this directory are not modified so
that they visit the file at the new location.

I reproduced the problem with emacs -q,  and I cannot find anything
about it in NEWS.28.

Was that an intended change ? If yes, is there a way to get back the old
behaviour? This is an incredibly useful feature; without it, I have to
kill all buffers visiting files in the directory and re-open them.

Regards,

-- 
Nicolas Martyanoff
http://snowsyn.net
khaelin@gmail.com

Re: Possible regression in dired when renaming directories

[Eli Zaretskii]

> From: Nicolas Martyanoff <khaelin@gmail.com>
> Date: Sun, 10 Apr 2022 15:28:13 +0200
> 
> I just updated from 27.2 to 28.1, and it seems a default behaviour has
> changed. When renaming a directory in dired, either using 'R' or with
> Wdired, buffers visiting files in this directory are not modified so
> that they visit the file at the new location.

I cannot reproduce this.  I tried R in Dired, and Emacs 28.1 works the
same as 27.2 here.

Can you provide a complete recipe starting from "emacs -Q" to
reproduce the problem?

Re: Possible regression in dired when renaming directories

[Nicolas Martyanoff]

Eli Zaretskii <eliz@gnu.org> writes:
> I cannot reproduce this.  I tried R in Dired, and Emacs 28.1 works the
> same as 27.2 here.
>
> Can you provide a complete recipe starting from "emacs -Q" to
> reproduce the problem?

Running emacs -Q:

- C-x C-f /tmp/dir1/file

- C-x C-s
  Answer 'y' to the prompt to create the directory. At this point the
  buffer 'file' visits /tmp/dir1/file, and the file exists on the disk.

- Run dired in /tmp.

- Rename /tmp/dir1 into /tmp/dir2, e.g. using 'R'.

- Switch to the 'file' buffer. It still visits /tmp/dir1/file even
  though the file is now located in /tmp/dir2.

- Additional test: running C-x C-s in the 'file' buffer will ask again
  to create /tmp/dir1, which is normal since the directory has been
  renamed to /tmp/dir2.

Regards,

-- 
Nicolas Martyanoff
http://snowsyn.net
khaelin@gmail.com

Re: Possible regression in dired when renaming directories

[Eli Zaretskii]

> From: Nicolas Martyanoff <khaelin@gmail.com>
> Date: Sun, 10 Apr 2022 16:49:50 +0200
> Cc: Nicolas Martyanoff <khaelin@gmail.com>, emacs-devel@gnu.org
> 
> - C-x C-f /tmp/dir1/file
> 
> - C-x C-s
>   Answer 'y' to the prompt to create the directory. At this point the
>   buffer 'file' visits /tmp/dir1/file, and the file exists on the disk.
> 
> - Run dired in /tmp.
> 
> - Rename /tmp/dir1 into /tmp/dir2, e.g. using 'R'.
> 
> - Switch to the 'file' buffer. It still visits /tmp/dir1/file even
>   though the file is now located in /tmp/dir2.

Right, thanks.

Please report a bug using "M-x report-emacs-bug RET", with this
recipe.  I don't think this was intended, but I will investigate.