bug#59165: 29.0.50; [PATCH] Ibuffer directory filter not buffer aware

[Eli Zaretskii]

> From: Gabriel <gabriel376@hotmail.com>
> Date: Thu, 10 Nov 2022 06:22:23 -0300
> 
> Description:
> The ibuffer directory filter is not buffer aware for buffers not
> visiting files. This bug seems to be introduced by commit 3ef18c7a213,
> which made the `default-directory` no longer run within
> `with-current-buffer`.
> 
> Steps:
> 1. emacs -Q (29.0.50 master d04433b96215d7d3387573f19cc315de86f2341a)
> 2. M-x dired /home/myuser/foo
> 3. M-x compile ls -lha
> 4. M-x ibuffer
> 5. / F /home/myuser/foo
> 
> Expected: filter is applied and two buffers are shown: `foo` and
> `*compilation*`.
> 
> Actual: only buffer `foo` is shown.
> 
> Patch:
> Below there is a proposed patch. I did a quick inspection and could not
> find similar regressions in other ibuffer filters.

Stefan, can you please look into this?