Hi. I'm getting a "VC method not implemented for backend: update-changelog, Git" error message upon trying to run vc-update-change-log. I admittedly have started to learn Emacs' VC twice, so the following "bug" may be PEBCAK. I encountered it in a previous test repo (in which I already had a ChangeLog file in place) where I was trying out and learning the key bindings. I have replicated the same issue with no customizations in a new repository, and I decided to report because I remember that in a previous version of Emacs (<29), I didn't encounter this issue and had already added a couple of entries to that changelog file. Environment info: - Kernel release: 6.2.0-34-generic - Distribution: Ubuntu 23.04 'lunar' Guix version: - guix (GNU Guix) 7823c6504082a0cfbd98beb301e041fb8bc4e44e Steps to reproduce: Start Emacs with no customizations: emacs -Q (This may not be relevant, but in my Guix installation I get the following error messages and a warning): Gtk-Message: 12:49:46.266: Failed to load module "canberra-gtk-module" Gtk-Message: 12:49:46.267: Failed to load module "canberra-gtk-module" ** (emacs:56729): WARNING **: 12:50:11.409: atk-bridge: get_device_events_reply: unknown signature Activate debugging on error (with execute-extended-command) M-x toggle-debug-on-error Create test directory: M-x mkdir ~/projects/test-vc Visit file (find-file): C-x C-f ~/projects/test-vc/foo Require VC (using eval-expression): M-: (require 'vc) Create a repository: M-x vc-create-repo Git Write anything to the file: This is foo. Save (save-buffer): C-x C-s For the next action, one may need to run on the following shell command, in case gpg signing rules in git config apply to one's directory: git config --local commit.gpgsign false Otherwise, here's a work-around that I wrote in Stack Overflow if one gets the "error: gpg failed to sign the data" and "fatal: failed to write commit" errors: https://stackoverflow.com/a/76909097/297570 Proceed with registering the file with VC's next action (vc-next-action, which would proceed with C-x v i --- vc-register): C-x v v Commit fileset changes with vc-next-action: C-x v v Add commit message in *vc-log* buffer: Created foo C-c C-c Try to add changes to ChangeLog (vc-update-change-log): C-x v a This results in the following debug message: Debugger entered--Lisp error: (vc-not-supported update-changelog Git) vc-call-backend(Git update-changelog nil) vc-update-change-log() funcall-interactively(vc-update-change-log) command-execute(vc-update-change-log) And the error message upon continuing: VC method not implemented for backend: update-changelog, Git Please let me know if I can help to further diagnose this issue. Thanks in advance for your help and support. Kind regards, Rolando In GNU Emacs 29.1 (build 1, x86_64-pc-linux-gnu, GTK+ Version 3.24.37, cairo version 1.16.0) Windowing system distributor 'The X.Org Foundation', version 11.0.12201008 System Description: Ubuntu 23.04 Configured using: 'configure CONFIG_SHELL=/gnu/store/v9p25q9l5nnaixkhpap5rnymmwbhf9rp-bash-minimal-5.1.16/bin/bash SHELL=/gnu/store/v9p25q9l5nnaixkhpap5rnymmwbhf9rp-bash-minimal-5.1.16/bin/bash --prefix=/gnu/store/438d4ibli2jbyjipzp21r4cp8qd9v832-emacs-29.1 --enable-fast-install --with-cairo --with-modules --with-native-compilation=aot --disable-build-details' Configured features: ACL CAIRO DBUS FREETYPE GIF GLIB GMP GNUTLS GPM GSETTINGS HARFBUZZ JPEG JSON LCMS2 LIBOTF LIBSELINUX LIBSYSTEMD LIBXML2 M17N_FLT MODULES NATIVE_COMP NOTIFY INOTIFY PDUMPER PNG RSVG SECCOMP SOUND SQLITE3 THREADS TIFF TOOLKIT_SCROLL_BARS TREE_SITTER X11 XDBE XIM XINPUT2 XPM GTK3 ZLIB Important settings: value of $EMACSLOADPATH: /home/rolandog/.guix-profile/share/emacs/site-lisp:/home/rolandog/.guix-profile/share/emacs/site-lisp:/gnu/store/438d4ibli2jbyjipzp21r4cp8qd9v832-emacs-29.1/share/emacs/29.1/lisp value of $LC_MONETARY: nl_NL.UTF-8 value of $LC_NUMERIC: nl_NL.UTF-8 value of $LC_TIME: nl_NL.UTF-8 value of $LANG: en_US.UTF-8 value of $XMODIFIERS: @im=ibus locale-coding-system: utf-8-unix Major mode: Fundamental Minor modes in effect: tooltip-mode: t global-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 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 cl-print byte-opt debug backtrace cus-start cus-load jka-compr find-func vc-annotate vc-filewise thingatpt vc-dir ewoc mule-util display-line-numbers log-edit message sendmail mailcap yank-media puny dired dired-loaddefs rfc822 mml mml-sec password-cache epa derived epg rfc6068 epg-config gnus-util mm-decode mm-bodies mm-encode mail-parse rfc2231 rfc2047 rfc2045 mm-util ietf-drums mail-prsvr mailabbrev mail-utils gmm-utils mailheader ring add-log shortdoc text-property-search help-fns radix-tree misearch multi-isearch noutline outline kmacro facemenu two-column vc-hg vc-bzr vc-src vc-sccs vc-svn vc-cvs vc-rcs log-view pcvs-util vc-git diff-mode easy-mmode vc vc-dispatcher time-date cl-loaddefs comp comp-cstr warnings icons subr-x rx cl-seq cl-macs gv cl-extra help-mode bytecomp byte-compile 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 inotify lcms2 dynamic-setting system-font-setting font-render-setting cairo move-toolbar gtk x-toolkit xinput2 x multi-tty make-network-process native-compile emacs) Memory information: ((conses 16 162437 20274) (symbols 48 11213 1) (strings 32 35809 2073) (string-bytes 1 1095353) (vectors 16 26474) (vector-slots 8 744256 36866) (floats 8 173 115) (intervals 56 9221 489) (buffers 984 24)) -- Rolando Garza C. PGP Fingerprint: B293 0425 5506 8441 0803 387A E726 BC7B EF39 923D