bug#51897: 29.0.50; keymap-global-unset cannot unset C-x C-z

[Manuel Uberti]

From emacs -Q:

- M-x toggle-debug-on-error
- Evaluating (keymap-global-unset "C-x C-z") I get

Debugger entered--Lisp error: (error "Key sequence C - x SPC C - z starts with 
non-prefi...")
  keymap-unset((keymap #^[nil nil keymap #^^[3 0 set-mark-command 
move-beginning-of-line backward-char mode-specific-command-prefix delete-char 
move-end-of-line forward-char keyboard-quit help-command indent-for-tab-command 
electric-newline-and-maybe-indent kill-line recenter-top-bottom ...] #^^[1 0 
#^^[2 0 #^^[3 0 set-mark-command move-beginning-of-line backward-char 
mode-specific-command-prefix delete-char move-end-of-line forward-char 
keyboard-quit help-command indent-for-tab-command 
electric-newline-and-maybe-indent kill-line recenter-top-bottom ...] 
self-insert-command self-insert-command self-insert-command self-insert-command 
self-insert-command self-insert-command self-insert-command self-insert-command 
self-insert-command self-insert-command self-insert-command self-insert-command 
...] self-insert-command self-insert-command self-insert-command 
self-insert-command self-insert-command self-insert-command self-insert-command 
self-insert-command self-insert-command self-insert-command self-insert-command 
self-insert-command ...] self-insert-command self-insert-command 
self-insert-command self-insert-command self-insert-command self-insert-command 
self-insert-command self-insert-command self-insert-command ...] ... ... ... ... 
... ... ... ... ... ... ... ... ...) "C-x C-z" nil)
  keymap-global-unset("C-x C-z")
  (progn (keymap-global-unset "C-x C-z"))
  eval((progn (keymap-global-unset "C-x C-z")) t)
  elisp--eval-last-sexp(nil)
  eval-last-sexp(nil)
  funcall-interactively(eval-last-sexp nil)
  command-execute(eval-last-sexp)


Previously I was using (global-unset-key ["C-x C-z"]), which still works.


In GNU Emacs 29.0.50 (build 1, x86_64-pc-linux-gnu, GTK+ Version 3.24.18, cairo 
version 1.16.0)
 of 2021-11-16 built on hathaway
Repository revision: 4f47f10d9f8f3864fd37685b290e4ca5d339ba35
Repository branch: master
Windowing system distributor 'The X.Org Foundation', version 11.0.12009000
System Description: Ubuntu 20.04 LTS

Configured using:
 'configure --with-harfbuzz --with-native-compilation'

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 THREADS TIFF
TOOLKIT_SCROLL_BARS X11 XDBE XIM XPM GTK3 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: 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
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  line-number-mode: t
  indent-tabs-mode: t
  transient-mark-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 epa derived epg rfc6068
epg-config gnus-util rmail rmail-loaddefs auth-source eieio eieio-core
eieio-loaddefs password-cache json map text-property-search time-date
mm-decode mm-bodies mm-encode mail-parse rfc2231 mailabbrev gmm-utils
mailheader sendmail rfc2047 rfc2045 ietf-drums mm-util mail-prsvr
mail-utils help-fns radix-tree cl-print debug backtrace find-func
cus-start comp comp-cstr warnings rx cl-seq cl-macs cl-extra seq gv
subr-x byte-opt bytecomp byte-compile cconv cus-load help-mode
cl-loaddefs cl-lib iso-transl tooltip 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 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 simple abbrev obarray cl-preloaded nadvice 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 dbusbind inotify lcms2
dynamic-setting system-font-setting font-render-setting cairo
move-toolbar gtk x-toolkit x multi-tty make-network-process
native-compile emacs)

Memory information:
((conses 16 101454 7641)
 (symbols 48 9185 1)
 (strings 32 25266 3099)
 (string-bytes 1 821760)
 (vectors 16 17143)
 (vector-slots 8 297994 13136)
 (floats 8 31 39)
 (intervals 56 480 0)
 (buffers 992 13))

--
Manuel Uberti
www.manueluberti.eu