GNU bug report logs - #80013
31.0.50; "No such file or directory" "vc-nil"

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

From: Manuel Uberti <manuel.uberti <at> inventati.org>
To: bug-gnu-emacs <at> gnu.org
Subject: 31.0.50; "No such file or directory" "vc-nil"
Date: Mon, 15 Dec 2025 18:13:39 +0100

Hi,

this is a recipe to reproduce the problem:

- (require 'project)
- (setq-default project-vc-extra-root-markers '(".project"))
- M-x make-directory /tmp/test
- Create a file named ".project" in /tmp/test
- Visit that file
- C-x p f

In GNU Emacs 31.0.50 (build 1, x86_64-pc-linux-gnu, cairo version
 1.18.0) of 2025-12-15 built on baruch
Repository revision: 45285a41d4f784b6ec9d9f808920d20add59e17b
Repository branch: master
Windowing system distributor 'The X.Org Foundation', version 11.0.12302006
System Description: Ubuntu 24.04.3 LTS

Configured using:
 'configure --with-x-toolkit=no 'CFLAGS=-O2 -pipe -march=native
 -fomit-frame-pointer''

Configured features:
ACL CAIRO DBUS FREETYPE GIF GLIB GMP GNUTLS GPM GSETTINGS HARFBUZZ JPEG
LCMS2 LIBOTF LIBSELINUX LIBSYSTEMD LIBXML2 M17N_FLT MODULES NATIVE_COMP
NOTIFY INOTIFY OLDXMENU PDUMPER PNG RSVG SECCOMP SOUND SQLITE3 THREADS
TIFF TREE_SITTER WEBP X11 XDBE XIM XINERAMA XINPUT2 XPM XRANDR ZLIB

Important settings:
  value of $LC_MESSAGES: en_GB.UTF-8
  value of $LC_MONETARY: it_IT.UTF-8
  value of $LC_NUMERIC: it_IT.UTF-8
  value of $LC_TIME: it_IT.UTF-8
  value of $LANG: en_US.UTF-8
  value of $XMODIFIERS: @im=ibus
  locale-coding-system: utf-8-unix

Major mode: Debugger

Minor modes in effect:
  tooltip-mode: t
  global-eldoc-mode: t
  eldoc-mode: t
  show-paren-mode: t
  electric-indent-mode: t
  mouse-wheel-mode: t
  tool-bar-mode: t
  menu-bar-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  blink-cursor-mode: t
  minibuffer-nonselected-mode: t
  minibuffer-regexp-mode: t
  buffer-read-only: t
  line-number-mode: t
  indent-tabs-mode: t
  transient-mark-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t

Load-path shadows:
None found.

Features:
(shadow sort mail-extr emacsbug lisp-mnt message mailcap yank-media puny
rfc822 mml mml-sec password-cache epa derived epg rfc6068 epg-config
gnus-util time-date mm-decode mm-bodies mm-encode mailabbrev gmm-utils
mailheader sendmail mail-parse rfc2231 rfc2047 rfc2045 ietf-drums
mm-util mail-prsvr mail-utils thingatpt pp cl-seq cus-load dired-aux
dired dired-loaddefs help-fns radix-tree cl-print debug backtrace
help-mode find-func compile text-property-search comint subr-x ansi-osc
ansi-color ring comp-run comp-common rx project byte-opt gv bytecomp
byte-compile cl-loaddefs cl-lib rmc iso-transl tooltip cconv eldoc paren
electric uniquify ediff-hook vc-hooks lisp-float-type elisp-mode mwheel
term/x-win x-win term/common-win x-dnd touch-screen tool-bar dnd fontset
image regexp-opt fringe tabulated-list replace newcomment text-mode
lisp-mode prog-mode register page tab-bar menu-bar rfn-eshadow isearch
easymenu timer select scroll-bar mouse jit-lock font-lock syntax
font-core term/tty-colors frame minibuffer nadvice seq simple cl-generic
indonesian philippine cham georgian utf-8-lang misc-lang vietnamese
tibetan thai tai-viet lao korean japanese eucjp-ms cp51932 hebrew greek
romanian slovak czech european ethiopic indian cyrillic chinese
composite emoji-zwj charscript charprop case-table epa-hook
jka-cmpr-hook help abbrev obarray oclosure cl-preloaded button loaddefs
theme-loaddefs faces cus-face macroexp files window text-properties
overlay sha1 md5 base64 format env code-pages mule custom widget keymap
hashtable-print-readable backquote threads dbusbind inotify lcms2
dynamic-setting system-font-setting font-render-setting cairo xinput2 x
multi-tty move-toolbar make-network-process tty-child-frames
native-compile emacs)

Memory information:
((conses 16 93844 19428) (symbols 48 8785 0) (strings 32 26536 4464)
 (string-bytes 1 785848) (vectors 16 17406)
 (vector-slots 8 194039 10551) (floats 8 39 86) (intervals 56 610 12)
 (buffers 1064 16))

-- 
Manuel Uberti
https://manueluberti.eu

Message #8 received at 80013 <at> debbugs.gnu.org (full text, mbox):

From: Sean Whitton <spwhitton <at> spwhitton.name>
To: 80013 <at> debbugs.gnu.org, Manuel Uberti <manuel.uberti <at> inventati.org>
Subject: Re: bug#80013: 31.0.50; "No such file or directory" "vc-nil"
Date: Wed, 17 Dec 2025 12:45:45 +0000

Hello,

On Mon 15 Dec 2025 at 06:13pm +01, Manuel Uberti wrote:

> Hi,
>
> this is a recipe to reproduce the problem:
>
> - (require 'project)
> - (setq-default project-vc-extra-root-markers '(".project"))
> - M-x make-directory /tmp/test
> - Create a file named ".project" in /tmp/test
> - Visit that file
> - C-x p f

I'm not sure that this is a bug, because by setting
project-vc-extra-root-markers that way, you are telling Emacs to expect
that one of the entries in vc-handled-backends will recognise the file
as managed by a VCS, but it isn't?

-- 
Sean Whitton

Message #11 received at 80013 <at> debbugs.gnu.org (full text, mbox):

From: Manuel Uberti <manuel.uberti <at> inventati.org>
To: Sean Whitton <spwhitton <at> spwhitton.name>, 80013 <at> debbugs.gnu.org
Subject: Re: bug#80013: 31.0.50; "No such file or directory" "vc-nil"
Date: Wed, 17 Dec 2025 17:08:27 +0100

On 12/17/25 13:45, Sean Whitton wrote:
> I'm not sure that this is a bug, because by setting
> project-vc-extra-root-markers that way, you are telling Emacs to expect
> that one of the entries in vc-handled-backends will recognise the file
> as managed by a VCS, but it isn't?

Correct, it's not a project managed by VCS, but
project-vc-extra-root-markers can be used for non VCS projects, as per
its documentation:

These will be used in addition to regular directory markers such
as ".git", ".hg", and so on, depending on the value of
‘vc-handled-backends’.  It is most useful when a project has
subdirectories inside it that need to be considered as separate
projects.  It can also be used for projects outside of VC
repositories.


-- 
Manuel Uberti
https://manueluberti.eu

Message #14 received at 80013 <at> debbugs.gnu.org (full text, mbox):

From: Sean Whitton <spwhitton <at> spwhitton.name>
To: 80013 <at> debbugs.gnu.org, Dmitry Gutov <dmitry <at> gutov.dev>
Cc: Manuel Uberti <manuel.uberti <at> inventati.org>
Subject: Re: bug#80013: 31.0.50; "No such file or directory" "vc-nil"
Date: Wed, 17 Dec 2025 17:37:53 +0000

Hello,

On Wed 17 Dec 2025 at 05:08pm +01, Manuel Uberti wrote:

> On 12/17/25 13:45, Sean Whitton wrote:
>> I'm not sure that this is a bug, because by setting
>> project-vc-extra-root-markers that way, you are telling Emacs to expect
>> that one of the entries in vc-handled-backends will recognise the file
>> as managed by a VCS, but it isn't?
>
> Correct, it's not a project managed by VCS, but
> project-vc-extra-root-markers can be used for non VCS projects, as per
> its documentation:
>
> These will be used in addition to regular directory markers such
> as ".git", ".hg", and so on, depending on the value of
> ‘vc-handled-backends’.  It is most useful when a project has
> subdirectories inside it that need to be considered as separate
> projects.  It can also be used for projects outside of VC
> repositories.

Fair enough.  I don't think I understand why this mechanism isn't
altogether separate from the VC project type.  Let's see what Dmitry
thinks of this bug; adding him.

-- 
Sean Whitton

Message #19 received at 80013-done <at> debbugs.gnu.org (full text, mbox):

From: Dmitry Gutov <dmitry <at> gutov.dev>
To: Sean Whitton <spwhitton <at> spwhitton.name>, 80013-done <at> debbugs.gnu.org
Cc: Manuel Uberti <manuel.uberti <at> inventati.org>
Subject: Re: bug#80013: 31.0.50; "No such file or directory" "vc-nil"
Date: Thu, 18 Dec 2025 03:50:25 +0200

On 17/12/2025 19:37, Sean Whitton wrote:
>> Correct, it's not a project managed by VCS, but
>> project-vc-extra-root-markers can be used for non VCS projects, as per
>> its documentation:
>>
>> These will be used in addition to regular directory markers such
>> as ".git", ".hg", and so on, depending on the value of
>> ‘vc-handled-backends’.  It is most useful when a project has
>> subdirectories inside it that need to be considered as separate
>> projects.  It can also be used for projects outside of VC
>> repositories.
> Fair enough.  I don't think I understand why this mechanism isn't
> altogether separate from the VC project type.  Let's see what Dmitry
> thinks of this bug; adding him.

Hi! Thank you both, should be fixed now in 75a1403ff3e.

Message #22 received at 80013 <at> debbugs.gnu.org (full text, mbox):

From: Sean Whitton <spwhitton <at> spwhitton.name>
To: 80013 <at> debbugs.gnu.org
Cc: dmitry <at> gutov.dev, manuel.uberti <at> inventati.org
Subject: Re: bug#80013: 31.0.50; "No such file or directory" "vc-nil"
Date: Thu, 18 Dec 2025 11:48:51 +0000

Hello,

On Thu 18 Dec 2025 at 03:50am +02, Dmitry Gutov wrote:

> On 17/12/2025 19:37, Sean Whitton wrote:
>>> Correct, it's not a project managed by VCS, but
>>> project-vc-extra-root-markers can be used for non VCS projects, as per
>>> its documentation:
>>>
>>> These will be used in addition to regular directory markers such
>>> as ".git", ".hg", and so on, depending on the value of
>>> ‘vc-handled-backends’.  It is most useful when a project has
>>> subdirectories inside it that need to be considered as separate
>>> projects.  It can also be used for projects outside of VC
>>> repositories.
>> Fair enough.  I don't think I understand why this mechanism isn't
>> altogether separate from the VC project type.  Let's see what Dmitry
>> thinks of this bug; adding him.
>
> Hi! Thank you both, should be fixed now in 75a1403ff3e.

Ah, many thanks Dmitry.

-- 
Sean Whitton

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