bug#62447: 30.0.50; xref default behaviour changed after a desktop-read

[Manuel Giraud via "Bug reports for GNU Emacs, the Swiss army knife of text editors" <bug-gnu-emacs@gnu.org>]

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
  global-eldoc-mode: t
  show-paren-mode: t
  electric-indent-mode: t
  mouse-wheel-mode: t
  menu-bar-mode: t
  file-name-shadow-mode: t
  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:
(shadow sort mail-extr org-indent idlwave idlwave-help idlw-help rng-xsd
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
cus-start paredit edmacro time battery cus-load exwm-randr xcb-randr
exwm-config ido exwm exwm-input xcb-keysyms xcb-xkb exwm-manage
exwm-floating xcb-cursor xcb-render exwm-layout exwm-workspace exwm-core
xcb-ewmh xcb-icccm xcb xcb-xproto xcb-types xcb-debug kmacro server
modus-operandi-theme modus-themes ytdious mingus libmpdee reporter
edebug debug backtrace transmission color calc-bin calc-ext calc
calc-loaddefs rect calc-macs supercite regi ebdb-message ebdb-gnus
gnus-msg gnus-art mm-uu mml2015 mm-view mml-smime smime gnutls dig
gnus-sum shr pixel-fill kinsoku url-file svg dom gnus-group gnus-undo
gnus-start gnus-dbus gnus-cloud nnimap nnmail mail-source utf7 nnoo
gnus-spec gnus-int gnus-range message sendmail yank-media puny rfc822
mml mml-sec epa epg rfc6068 epg-config mm-decode mm-bodies mm-encode
mail-parse rfc2231 rfc2047 rfc2045 ietf-drums gmm-utils mailheader
gnus-win gnus nnheader gnus-util mail-utils range mm-util mail-prsvr
wid-edit ebdb-mua ebdb-com crm ebdb-format ebdb mailabbrev eieio-opt
cl-extra help-mode speedbar ezimage dframe eieio-base pcase timezone
visual-basic-mode cl web-mode derived disp-table erlang-start
smart-tabs-mode skeleton cc-mode cc-fonts cc-guess cc-menus cc-cmds
cc-styles cc-align cc-engine cc-vars cc-defs slime-asdf grep slime-tramp
tramp tramp-loaddefs trampver tramp-integration files-x tramp-compat
shell parse-time iso8601 ls-lisp slime-fancy slime-indentation
slime-cl-indent cl-indent slime-trace-dialog slime-fontifying-fu
slime-package-fu slime-references slime-compiler-notes-tree advice
slime-scratch slime-presentations bridge slime-macrostep macrostep
slime-mdot-fu slime-enclosing-context slime-fuzzy slime-fancy-trace
slime-fancy-inspector slime-c-p-c slime-editing-commands slime-autodoc
slime-repl slime-parse slime apropos compile text-property-search etags
fileloop xref project arc-mode archive-mode pp hyperspec thingatpt
slime-autoloads org-agenda org-element org-persist xdg org-id avl-tree
generator org-refile org ob ob-tangle ob-ref ob-lob ob-table ob-exp
org-macro org-src ob-comint org-pcomplete pcomplete comint ansi-osc
ansi-color ring org-list org-footnote org-faces org-entities time-date
noutline outline icons ob-emacs-lisp ob-core ob-eval org-cycle org-table
org-keys oc org-loaddefs find-func ol rx org-fold org-fold-core
org-compat org-version org-macs format-spec appt diary-lib
diary-loaddefs cal-menu calendar cal-loaddefs dired-aux dired-x dired
dired-loaddefs notifications dbus xml repeat easy-mmode osm-autoloads
rust-mode-autoloads ebdb-autoloads compat-autoloads magit-autoloads
debbugs-autoloads git-commit-autoloads magit-section-autoloads
ef-themes-autoloads with-editor-autoloads paredit-autoloads
dash-autoloads ytdious-autoloads transmission-autoloads
transient-autoloads exwm-autoloads hyperbole-autoloads
detached-autoloads info package browse-url url url-proxy url-privacy
url-expand url-methods url-history url-cookie generate-lisp-file
url-domsuf url-util mailcap url-handlers url-parse auth-source cl-seq
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
elisp-mode mwheel term/x-win x-win term/common-win x-dnd 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 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