bug#55708: (key-description (kbd "C-F")) becomes "C-f"

[meedstrom]

In Emacs 29, running emacs -Q, we get inconsistent results:

(key-description (kbd "M-F")) returns "M-F"

(key-description (kbd "H-F")) returns "H-F"

(key-description (kbd "A-F")) returns "A-F"

but

(key-description (kbd "C-F")) returns "C-f"

I would have expected to see either "C-F" or "C-S-f".

It's probably not related to `translate-upper-case-key-bindings' is nil, it's the same result either way.

I don't know if you consider this behavior a bug, but I rely on this function chain to "normalize" descriptions such as C-<M-backspace> to C-M-<backspace>. If there's an alternative way to do that I'd be happy to hear about it!

Martin

In GNU Emacs 29.0.50 (build 1, x86_64-pc-linux-gnu, GTK+ Version 3.24.30, cairo version 1.16.0)

System Description: Guix System

Configured using:

'configure

CONFIG_SHELL=/gnu/store/4y5m9lb8k3qkb1y9m02sw9w9a6hacd16-bash-minimal-5.1.8/bin/bash

SHELL=/gnu/store/4y5m9lb8k3qkb1y9m02sw9w9a6hacd16-bash-minimal-5.1.8/bin/bash

--prefix=/gnu/store/bf2n69a7pqj3w22z8702h90l77rh2bkf-emacs-next-pgtk-29.0.50-0.38d87c4

--enable-fast-install --with-pgtk --with-xwidgets --with-modules

--with-cairo --disable-build-details'

Configured features:

ACL CAIRO DBUS FREETYPE GIF GLIB GMP GNUTLS GPM GSETTINGS HARFBUZZ JPEG

JSON LIBOTF LIBSYSTEMD LIBXML2 MODULES NOTIFY INOTIFY PDUMPER PGTK PNG

RSVG SECCOMP SOUND SQLITE3 THREADS TIFF TOOLKIT_SCROLL_BARS XIM XWIDGETS

GTK3 ZLIB

Important settings:

value of $EMACSLOADPATH: /home/kept/guix-profiles/emacs/emacs/share/emacs/site-lisp:/gnu/store/bf2n69a7pqj3w22z8702h90l77rh2bkf-emacs-next-pgtk-29.0.50-0.38d87c4/share/emacs/29.0.50/lisp:/gnu/store/bf2n69a7pqj3w22z8702h90l77rh2bkf-emacs-next-pgtk-29.0.50-0.38d87c4/share/emacs/29.0.50/lisp

value of $LANG: en_DK.utf8

locale-coding-system: utf-8-unix

Major mode: Lisp Interaction

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

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 message mailcap yank-media rmc puny

dired dired-loaddefs rfc822 mml mml-sec password-cache epa derived epg

rfc6068 epg-config gnus-util text-property-search time-date seq gv

subr-x byte-opt bytecomp byte-compile cconv mm-decode mm-bodies

mm-encode mail-parse rfc2231 mailabbrev gmm-utils mailheader cl-loaddefs

cl-lib sendmail rfc2047 rfc2045 ietf-drums mm-util mail-prsvr mail-utils

two-column iso-transl tooltip eldoc paren electric uniquify ediff-hook

vc-hooks lisp-float-type elisp-mode mwheel term/pgtk-win pgtk-win

term/common-win 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 simple cl-generic 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 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 xwidget-internal dbusbind

inotify dynamic-setting system-font-setting font-render-setting cairo

gtk pgtk multi-tty make-network-process emacs)

Memory information:

((conses 16 44769 5884)

(symbols 48 5735 1)

(strings 32 15969 2383)

(string-bytes 1 541844)

(vectors 16 12239)

(vector-slots 8 171121 8958)

(floats 8 21 42)

(intervals 56 263 9)

(buffers 992 11))