GNU bug report logs - #80031
31.0.50; tramp-completion-file-name-handler leads to empty file list for shadowed path

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Daniel Mendler <mail <at> daniel-mendler.de>
To: bug-gnu-emacs <at> gnu.org
Subject: 31.0.50; tramp-completion-file-name-handler leads to empty file
 list for shadowed path
Date: Fri, 19 Dec 2025 03:14:58 +0100

1. I start from emacs -Q and execute this code in the scratch buffer:

   (require 'tramp)
   (setq default-directory "/")

2. Type C-x C-f
   => Find file: /

3. Type: ~/ TAB
   => [No match]
   EXPECTED: List of files in ~

The problem can be reproduced with the following snippets:

(let ((tramp-mode t)
      (minibuffer-completing-file-name t))
  (completion-file-name-table "~/" #'file-exists-p t))
=> nil ;; EXPECTED: List of files in ~

(let ((tramp-mode nil)
      (minibuffer-completing-file-name nil))
  (completion-file-name-table "~/" #'file-exists-p t))
=> '(".cache/" ".config/" ...)

In GNU Emacs 31.0.50 (build 1, x86_64-pc-linux-gnu, GTK+ Version
 3.24.49, cairo version 1.18.4) of 2025-12-14
Windowing system distributor 'The X.Org Foundation', version 11.0.12101016
System Description: Debian GNU/Linux 13 (trixie)

Configured using:
 'configure --prefix=$HOME/.local/share/emacs
 --without-compress-install --with-tree-sitter --with-native-compilation
 --with-dbus --without-selinux --without-threads --disable-gc-mark-trace
 --without-gsettings --without-gpm --with-cairo --with-cairo-xcb
 --with-xinput2 --with-x-toolkit=gtk3 --without-toolkit-scroll-bars
 'CFLAGS=-O3 -mtune=native -march=native''

Configured features:
CAIRO DBUS FREETYPE GIF GLIB GMP GNUTLS HARFBUZZ JPEG LIBOTF LIBSYSTEMD
LIBXML2 MODULES NATIVE_COMP NOTIFY INOTIFY PDUMPER PNG RSVG SECCOMP
SOUND SQLITE3 TIFF TREE_SITTER WEBP X11 XDBE XIM XINERAMA XINPUT2 XPM
XRANDR GTK3 ZLIB

Message #8 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Michael Albinus <michael.albinus <at> gmx.de>
To: Daniel Mendler via "Bug reports for GNU Emacs, the Swiss army knife of
 text editors" <bug-gnu-emacs <at> gnu.org>
Cc: Daniel Mendler <mail <at> daniel-mendler.de>, 80031 <at> debbugs.gnu.org
Subject: Re: bug#80031: 31.0.50; tramp-completion-file-name-handler leads to
 empty file list for shadowed path
Date: Fri, 19 Dec 2025 20:01:52 +0100

[Message part 1 (text/plain, inline)]

Daniel Mendler via "Bug reports for GNU Emacs, the Swiss army knife of
text editors" <bug-gnu-emacs <at> gnu.org> writes:

Hi Daniel,

> 1. I start from emacs -Q and execute this code in the scratch buffer:
>
>    (require 'tramp)
>    (setq default-directory "/")
>
> 2. Type C-x C-f
>    => Find file: /
>
> 3. Type: ~/ TAB
>    => [No match]
>    EXPECTED: List of files in ~

Thanks for the report, I can reproduce the problem. Could you, pls,
check, whether the appended patch fixes the problem?

Best regards, Michael.

[Message part 2 (text/x-patch, attachment)]

Message #14 received at 80031 <at> debbugs.gnu.org (full text, mbox):

From: Daniel Mendler <mail <at> daniel-mendler.de>
To: Michael Albinus <michael.albinus <at> gmx.de>
Cc: 80031 <at> debbugs.gnu.org
Subject: Re: bug#80031: 31.0.50; tramp-completion-file-name-handler leads to
 empty file list for shadowed path
Date: Fri, 19 Dec 2025 20:19:37 +0100

Michael Albinus <michael.albinus <at> gmx.de> writes:

> Daniel Mendler via "Bug reports for GNU Emacs, the Swiss army knife of
> text editors" <bug-gnu-emacs <at> gnu.org> writes:
>
> Hi Daniel,
>
>> 1. I start from emacs -Q and execute this code in the scratch buffer:
>>
>>    (require 'tramp)
>>    (setq default-directory "/")
>>
>> 2. Type C-x C-f
>>    => Find file: /
>>
>> 3. Type: ~/ TAB
>>    => [No match]
>>    EXPECTED: List of files in ~
>
> Thanks for the report, I can reproduce the problem. Could you, pls,
> check, whether the appended patch fixes the problem?

Yes, it fixes the problem. Thanks and happy holidays!

> Best regards, Michael.

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