[debbugs-tracker] bug#34529: closed (C-x b became unusable (ido, recentf, tramp))

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Your message dated Thu, 21 Feb 2019 09:12:16 +0100
with message-id <address@hidden>
and subject line Re: bug#34529: C-x b became unusable (ido, recentf, tramp)
has caused the debbugs.gnu.org bug report #34529,
regarding C-x b became unusable (ido, recentf, tramp)
to be marked as done.

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34529: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=34529
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--- Begin Message --- Subject: C-x b became unusable (ido, recentf, tramp) Date: Mon, 18 Feb 2019 17:58:22 +0100

I had a problem, which can be reproduced to some extent with the
following snippet.  (emacs -Q -l /tmp/bug.el)

   (require 'recentf)
   (setq recentf-save-file "/tmp/bug-recentf")
   (setq recentf-list '("/ssh:localhost#2222:~/a.txt"))
   (setq ido-use-virtual-buffers t)
   (setq ido-save-directory-list-file "/tmp/bug-ido.last")
   (recentf-save-list)
   (ido-mode t)
   (ido-switch-buffer) ; Simulating C-x b

However, that doesn't explain how that entry ended up in my
recentf-save-file.  I'm guessing I opened many tramp files in a
virtual machine, and after I had halted the virtual machine,
emacs wanted to convert the file names to absolute paths.
Strangely,
(get-file-buffer "/ssh:localhost#2222:~/a.txt") and
(expand-file-name "/ssh:localhost#2222:~/a.txt") fail, but

evaluating them the second time, they succeed,  but

expand-file-name returns a wrong value, i.e,

(expand-file-name "/ssh:localhost#2222:~/a.txt")
   =>  error
(expand-file-name "/ssh:localhost#2222:~/a.txt")
   =>  "/ssh:localhost#2222:~/a.txt"

"emacs -Q -l /tmp/bug.el" reproduces the problem with version
25.1.1 and a recent 27.0.50 as well, but I think it was former
who originally wrote the problematic entry into the
recent-save-file.

Thank you.

--- End Message ---

> --- Begin Message ---
>
>
>
> Subject: 
>
> Re: bug#34529: C-x b became unusable (ido, recentf, tramp)
>
>
>
>
> Date: 
>
> Thu, 21 Feb 2019 09:12:16 +0100
>
>
>
>
> Hi Michael,
>
> > The problem seems to be rather ido. Could you pls check bug#24980? It
> > sounds similar to your problem, and it was solved in Emacs 26.1. Btw,
> > which Emacs version are you running?
>
> I bumped into the problem with Emacs 25.1, but I verified git head
> misbehaves with the part of the problem that I understood in my original
> report.  However, I forgot to check my recipe to insert a relative path
> into recentf-save-file is still valid for the latest Emacs.  It is not,
> so I close this report.
>
> Sorry for wasting your time,
> Felicián
>
>
> --- End Message ---