I tested the function kill-this-buffer with "emacs -Q", it consistently gives the output: "command-execute: kill-this-buffer must be bound to an event with parameters" and doesn't kill the current buffer. In GNU Emacs 30.1 (build 1, x86_64-pc-linux-gnu, GTK+ Version 3.24.41, cairo version 1.18.0) of 2025-02-24 built on lcy02-amd64-070 Repository revision: 2d442455d1b98a9f631889ca63f3c4f21d9062b5 Repository branch: master System Description: Ubuntu 22.04.5 LTS Configured using: 'configure --prefix=/snap/emacs/current/usr --with-x-toolkit=gtk3 --without-xaw3d --with-modules --with-cairo --with-native-compilation=aot --with-pgtk --with-xinput2 --with-tree-sitter 'CFLAGS=-isystem /build/emacs/parts/emacs/install/usr/include -isystem /build/emacs/parts/emacs/install/usr/include/x86_64-linux-gnu -isystem /build/emacs/stage/usr/include -O2' 'CPPFLAGS=-isystem /build/emacs/parts/emacs/install/usr/include -isystem /build/emacs/parts/emacs/install/usr/include/x86_64-linux-gnu -isystem /build/emacs/stage/usr/include' 'LDFLAGS=-L/build/emacs/parts/emacs/install/lib -L/build/emacs/parts/emacs/install/usr/lib -L/build/emacs/parts/emacs/install/lib/x86_64-linux-gnu -L/build/emacs/parts/emacs/install/usr/lib/x86_64-linux-gnu -L/build/emacs/stage/usr/lib'' Configured features: ACL CAIRO DBUS FREETYPE GIF GLIB GMP GNUTLS GPM GSETTINGS HARFBUZZ JPEG LCMS2 LIBOTF LIBSELINUX LIBSYSTEMD LIBXML2 MODULES NATIVE_COMP NOTIFY INOTIFY PDUMPER PGTK PNG RSVG SECCOMP SOUND SQLITE3 THREADS TIFF TOOLKIT_SCROLL_BARS TREE_SITTER WEBP XIM GTK3 ZLIB Important settings: 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 minibuffer-regexp-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 compile comint ansi-osc ansi-color ring comp-run bytecomp byte-compile comp-common rx emacsbug message mailcap yank-media puny dired dired-loaddefs rfc822 mml mml-sec password-cache epa derived epg rfc6068 epg-config gnus-util text-property-search time-date subr-x 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 rmc iso-transl tooltip cconv eldoc paren electric uniquify ediff-hook vc-hooks lisp-float-type elisp-mode mwheel term/pgtk-win pgtk-win term/common-win touch-screen pgtk-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 dynamic-setting system-font-setting font-render-setting cairo gtk pgtk lcms2 multi-tty move-toolbar make-network-process native-compile emacs) Memory information: ((conses 16 65706 8820) (symbols 48 6702 0) (strings 32 16692 2342) (string-bytes 1 591472) (vectors 16 10272) (vector-slots 8 142405 6642) (floats 8 22 2) (intervals 56 291 0) (buffers 992 11))