GNU bug report logs - #62447
30.0.50; xref default behaviour changed after a desktop-read

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

From: Manuel Giraud <manuel <at> ledu-giraud.fr>
To: bug-gnu-emacs <at> gnu.org
Subject: 30.0.50; xref default behaviour changed after a desktop-read
Date: Sat, 25 Mar 2023 19:39:33 +0100

Hi,

I'm using desktop-save-mode and since sometimes when I do a M-. on
function call in a C buffer, Emacs says:
user-error: No definitions found for: scroll_command

If I start without desktop-save-mode on, this works as usual: Emacs asks
me if I want to read the TAGS table.

So it may be that some mode loaded by some file opening mess up with
xref default behaviour... I don't know where to start to track this
down.


In GNU Emacs 30.0.50 (build 1, x86_64-unknown-openbsd7.3, cairo version
 1.17.8) of 2023-03-25 built on computer
Repository revision: d02f0221c41bf8b248d79e3aaebdec68789001da
Repository branch: master
Windowing system distributor 'The X.Org Foundation', version 11.0.12101006
System Description: OpenBSD computer 7.3 GENERIC.MP#1105 amd64

Configured using:
 'configure --prefix=/home/manuel/emacs --bindir=/home/manuel/bin
 --with-x-toolkit=no --without-sound --without-compress-install
 CPPFLAGS=-I/usr/local/include LDFLAGS=-L/usr/local/lib'

Configured features:
CAIRO DBUS FREETYPE GIF GLIB GMP GNUTLS GSETTINGS HARFBUZZ JPEG JSON
LCMS2 LIBOTF LIBXML2 MODULES NOTIFY KQUEUE OLDXMENU PDUMPER PNG RSVG
SQLITE3 THREADS TIFF TREE_SITTER WEBP X11 XDBE XIM XINPUT2 XPM ZLIB

Important settings:
  value of $LC_ALL: en_US.UTF-8
  locale-coding-system: utf-8-unix

Major mode: C/*lh

Minor modes in effect:
  bug-reference-prog-mode: t
  display-time-mode: t
  display-battery-mode: t
  server-mode: t
  shell-dirtrack-mode: t
  repeat-mode: t
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  show-paren-mode: t
  electric-indent-mode: t
  mouse-wheel-mode: t
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  global-font-lock-mode: t
  font-lock-mode: t
  blink-cursor-mode: 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
  abbrev-mode: t

Load-path shadows:
/home/manuel/.emacs.d/elpa/ef-themes-0.11.0/theme-loaddefs hides /home/manuel/emacs/share/emacs/30.0.50/lisp/theme-loaddefs
/home/manuel/.emacs.d/elpa/transient-0.3.7/transient hides /home/manuel/emacs/share/emacs/30.0.50/lisp/transient

Features:
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xsd-regexp rng-cmpct rng-nxml rng-valid rng-loc rng-uri rng-parse
nxml-parse rng-match rng-dt rng-util rng-pttrn nxml-ns nxml-mode
nxml-outln nxml-rap nxml-util nxml-enc xmltok vc-cvs vc-rcs log-view
pcvs-util conf-mode smerge-mode diff sh-script css-mode treesit smie
sgml-mode facemenu imenu pascal oc-basic ol-eww eww url-queue mm-url
ol-rmail ol-mhe ol-irc ol-info ol-gnus nnselect ol-docview doc-view
jka-compr image-mode exif ol-bibtex bibtex ol-bbdb ol-w3m ol-doi
org-link-doi mule-util gnus-dired autorevert filenotify desktop frameset
emacsbug misearch multi-isearch vc bug-reference ef-summer-theme
ef-themes executable vc-git diff-mode vc-dispatcher vc-svn cus-edit
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eieio eieio-core cl-macs password-cache json subr-x map byte-opt gv
bytecomp byte-compile url-vars cl-loaddefs cl-lib rmc iso-transl tooltip
cconv eldoc paren electric uniquify ediff-hook vc-hooks lisp-float-type
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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
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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 kqueue lcms2
dynamic-setting system-font-setting font-render-setting cairo xinput2 x
multi-tty make-network-process emacs)

Memory information:
((conses 16 720716 115765)
 (symbols 48 56315 1)
 (strings 32 178762 18770)
 (string-bytes 1 5593667)
 (vectors 16 105168)
 (vector-slots 8 2198363 148433)
 (floats 8 529 121)
 (intervals 56 17886 76)
 (buffers 984 104))

-- 
Manuel Giraud

Message #8 received at 62447 <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: Manuel Giraud <manuel <at> ledu-giraud.fr>
Cc: 62447 <at> debbugs.gnu.org
Subject: Re: bug#62447: 30.0.50;
 xref default behaviour changed after a desktop-read
Date: Sat, 25 Mar 2023 21:53:47 +0300

> Date: Sat, 25 Mar 2023 19:39:33 +0100
> From:  Manuel Giraud via "Bug reports for GNU Emacs,
>  the Swiss army knife of text editors" <bug-gnu-emacs <at> gnu.org>
> 
> I'm using desktop-save-mode and since sometimes when I do a M-. on
> function call in a C buffer, Emacs says:
> user-error: No definitions found for: scroll_command
> 
> If I start without desktop-save-mode on, this works as usual: Emacs asks
> me if I want to read the TAGS table.

If you start Emacs _with_ desktop-save-mode on, do you get some buffer
with TAGS table in it?  If yes, maybe that TAGS table is from the
wrong project?

Message #11 received at 62447 <at> debbugs.gnu.org (full text, mbox):

From: Juri Linkov <juri <at> linkov.net>
To: Manuel Giraud <manuel <at> ledu-giraud.fr>
Cc: 62447 <at> debbugs.gnu.org
Subject: Re: bug#62447: 30.0.50; xref default behaviour changed after a
 desktop-read
Date: Sat, 25 Mar 2023 21:25:13 +0200

> I'm using desktop-save-mode and since sometimes when I do a M-. on
> function call in a C buffer, Emacs says:
> user-error: No definitions found for: scroll_command
>
> If I start without desktop-save-mode on, this works as usual: Emacs asks
> me if I want to read the TAGS table.
>
> So it may be that some mode loaded by some file opening mess up with
> xref default behaviour... I don't know where to start to track this
> down.

I guess this is because the default value of `desktop-globals-to-save'
contains:

    tags-file-name
    tags-table-list

and the global values for these variables make no sense.
They should have project-local values, but project-local values are
not saved to the desktop file, only global and buffer-local values.

Message #14 received at 62447 <at> debbugs.gnu.org (full text, mbox):

From: Manuel Giraud <manuel <at> ledu-giraud.fr>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: 62447 <at> debbugs.gnu.org
Subject: Re: bug#62447: 30.0.50; xref default behaviour changed after a
 desktop-read
Date: Sat, 25 Mar 2023 23:04:44 +0100

Eli Zaretskii <eliz <at> gnu.org> writes:

> If you start Emacs _with_ desktop-save-mode on, do you get some buffer
> with TAGS table in it?  If yes, maybe that TAGS table is from the
> wrong project?

No I don't have TAGS table buffer in my saved desktop.
-- 
Manuel Giraud

Message #17 received at 62447 <at> debbugs.gnu.org (full text, mbox):

From: Manuel Giraud <manuel <at> ledu-giraud.fr>
To: Juri Linkov <juri <at> linkov.net>
Cc: 62447 <at> debbugs.gnu.org
Subject: Re: bug#62447: 30.0.50; xref default behaviour changed after a
 desktop-read
Date: Sat, 25 Mar 2023 23:13:58 +0100

Juri Linkov <juri <at> linkov.net> writes:

>> I'm using desktop-save-mode and since sometimes when I do a M-. on
>> function call in a C buffer, Emacs says:
>> user-error: No definitions found for: scroll_command
>>
>> If I start without desktop-save-mode on, this works as usual: Emacs asks
>> me if I want to read the TAGS table.
>>
>> So it may be that some mode loaded by some file opening mess up with
>> xref default behaviour... I don't know where to start to track this
>> down.
>
> I guess this is because the default value of `desktop-globals-to-save'
> contains:
>
>     tags-file-name
>     tags-table-list

Yes that's it!  I'm starting Emacs without desktop-save-mode on:
tags-table-list and tags-file-name are both nil.  I do a desktop-read
and tags-table-list is set to ("/home/manuel/emacs-repo/lib/TAGS") and
tags-file-name is set to "/home/manuel/emacs-repo/lib/TAGS".

> and the global values for these variables make no sense.
> They should have project-local values, but project-local values are
> not saved to the desktop file, only global and buffer-local values.

Maybe they could be removed from `desktop-globals-to-save'.
-- 
Manuel Giraud

Message #20 received at 62447 <at> debbugs.gnu.org (full text, mbox):

From: Manuel Giraud <manuel <at> ledu-giraud.fr>
To: Juri Linkov <juri <at> linkov.net>
Cc: 62447 <at> debbugs.gnu.org
Subject: Re: bug#62447: 30.0.50; xref default behaviour changed after a
 desktop-read
Date: Sat, 25 Mar 2023 23:50:43 +0100

Manuel Giraud <manuel <at> ledu-giraud.fr> writes:

> Yes that's it!  I'm starting Emacs without desktop-save-mode on:
> tags-table-list and tags-file-name are both nil.  I do a desktop-read
> and tags-table-list is set to ("/home/manuel/emacs-repo/lib/TAGS") and
> tags-file-name is set to "/home/manuel/emacs-repo/lib/TAGS".

In fact, my issue really come from having tags-table-list set to
'("/home/manuel/emacs-repo/lib/TAGS").  I don't know how I end up with
this value but now that it is set to '("/home/manuel/emacs-repo/src/TAGS")
(note "src" and not "lib") in the saved desktop this problem does not
show anymore.
-- 
Manuel Giraud

Message #23 received at 62447 <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: Juri Linkov <juri <at> linkov.net>
Cc: 62447 <at> debbugs.gnu.org, manuel <at> ledu-giraud.fr
Subject: Re: bug#62447: 30.0.50;
 xref default behaviour changed after a desktop-read
Date: Sun, 26 Mar 2023 07:25:17 +0300

> Cc: 62447 <at> debbugs.gnu.org
> From: Juri Linkov <juri <at> linkov.net>
> Date: Sat, 25 Mar 2023 21:25:13 +0200
> 
> > I'm using desktop-save-mode and since sometimes when I do a M-. on
> > function call in a C buffer, Emacs says:
> > user-error: No definitions found for: scroll_command
> >
> > If I start without desktop-save-mode on, this works as usual: Emacs asks
> > me if I want to read the TAGS table.
> >
> > So it may be that some mode loaded by some file opening mess up with
> > xref default behaviour... I don't know where to start to track this
> > down.
> 
> I guess this is because the default value of `desktop-globals-to-save'
> contains:
> 
>     tags-file-name
>     tags-table-list
> 
> and the global values for these variables make no sense.

Why not?  How is TAGS different from any other file visited by Emacs,
with respect to desktop-save-mode?

> They should have project-local values, but project-local values are
> not saved to the desktop file, only global and buffer-local values.

We don't force our users to use project.el in order to have some
file-visiting buffers to be saved in the desktop file.  E.g., I don't
use project.el, but I do use TAGS all the time, in particular with
Emacs.  Emacs supports lists of TAGS tables since time immemoriam, to
let users use M-. and friends with more than a single program.

Message #26 received at 62447 <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: Manuel Giraud <manuel <at> ledu-giraud.fr>
Cc: 62447 <at> debbugs.gnu.org, juri <at> linkov.net
Subject: Re: bug#62447: 30.0.50;
 xref default behaviour changed after a desktop-read
Date: Sun, 26 Mar 2023 07:57:35 +0300

> Cc: 62447 <at> debbugs.gnu.org
> Date: Sat, 25 Mar 2023 23:13:58 +0100
> From:  Manuel Giraud via "Bug reports for GNU Emacs,
>  the Swiss army knife of text editors" <bug-gnu-emacs <at> gnu.org>
> 
> Juri Linkov <juri <at> linkov.net> writes:
> 
> > I guess this is because the default value of `desktop-globals-to-save'
> > contains:
> >
> >     tags-file-name
> >     tags-table-list
> 
> Yes that's it!  I'm starting Emacs without desktop-save-mode on:
> tags-table-list and tags-file-name are both nil.  I do a desktop-read
> and tags-table-list is set to ("/home/manuel/emacs-repo/lib/TAGS") and
> tags-file-name is set to "/home/manuel/emacs-repo/lib/TAGS".
> 
> > and the global values for these variables make no sense.
> > They should have project-local values, but project-local values are
> > not saved to the desktop file, only global and buffer-local values.
> 
> Maybe they could be removed from `desktop-globals-to-save'.

No need.  You should be able to fix this by "M-x visit-tags-table",
specifying the TAGS file you want Emacs to use.

Message #29 received at 62447 <at> debbugs.gnu.org (full text, mbox):

From: Manuel Giraud <manuel <at> ledu-giraud.fr>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: 62447 <at> debbugs.gnu.org, juri <at> linkov.net
Subject: Re: bug#62447: 30.0.50; xref default behaviour changed after a
 desktop-read
Date: Sun, 26 Mar 2023 11:51:33 +0200

Eli Zaretskii <eliz <at> gnu.org> writes:

> No need.  You should be able to fix this by "M-x visit-tags-table",
> specifying the TAGS file you want Emacs to use.

Ok so this is not a bug.  I'll try to remember visit-tags-table next
time because I don't know how I end up having '("~/emacs-repo/lib/TAGS")
into tags-table-list.  Thanks.
-- 
Manuel Giraud

Message #32 received at 62447 <at> debbugs.gnu.org (full text, mbox):

From: Stefan Kangas <stefankangas <at> gmail.com>
To: Manuel Giraud <manuel <at> ledu-giraud.fr>
Cc: 62447 <at> debbugs.gnu.org, Eli Zaretskii <eliz <at> gnu.org>, juri <at> linkov.net
Subject: Re: bug#62447: 30.0.50;
 xref default behaviour changed after a desktop-read
Date: Mon, 11 Sep 2023 17:00:14 -0700

tags 62447 + notabug
close 62447
thanks

Manuel Giraud <manuel <at> ledu-giraud.fr> writes:

> Eli Zaretskii <eliz <at> gnu.org> writes:
>
>> No need.  You should be able to fix this by "M-x visit-tags-table",
>> specifying the TAGS file you want Emacs to use.
>
> Ok so this is not a bug.

Thanks, I'm therefore closing this bug report.

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