emacs -Q
M-: (setq auto-resize-tool-bars 'grow-only) RET
C-s

The tool bar now shows a ridiculously oversized marine life ring icon on the "Help" button, and the height of the tool bar has grown to accommodate the icon's size.

C-g

Expected behavior: The tool bar reverts back to how it was before C-s was pressed, except its height stays the same.

Actual behavior: The tool bar reverts back to how it was before, including reverting to its original height.

The continually changing tool bar height causes the windows under the toolbar to "bounce".  This is particularly annoying when a mouse click causes the tool bar to change height because Emacs interprets the click as a drag event (even though the mouse cursor has not moved).



In GNU Emacs 29.0.50 (build 1, x86_64-pc-linux-gnu, GTK+ Version 3.24.20, cairo version 1.16.0)
  of 2022-07-13 built on lcy02-amd64-070
System Description: Ubuntu 20.04.4 LTS

Configured using:
  'configure --build=x86_64-linux-gnu --prefix=/usr
  '--includedir=${prefix}/include' '--mandir=${prefix}/share/man'
  '--infodir=${prefix}/share/info' --sysconfdir=/etc --localstatedir=/var
  --disable-silent-rules '--libdir=${prefix}/lib/x86_64-linux-gnu'
  '--libexecdir=${prefix}/lib/x86_64-linux-gnu' --disable-maintainer-mode
  --disable-dependency-tracking --prefix=/usr --sharedstatedir=/var/lib
  --program-suffix=-snapshot --with-modules=yes --with-x=yes
  --with-x-toolkit=gtk3 --with-xwidgets=yes --with-pgtk=yes 'CFLAGS=-g
  -O2
  -fdebug-prefix-map=/build/emacs-snapshot-vc8IGV/emacs-snapshot-107401=. -fstack-protector-strong
  -Wformat -Werror=format-security' 'CPPFLAGS=-Wdate-time
  -D_FORTIFY_SOURCE=2' 'LDFLAGS=-Wl,-Bsymbolic-functions -Wl,-z,relro''

Configured features:
ACL CAIRO DBUS FREETYPE GIF GLIB GMP GNUTLS GPM GSETTINGS HARFBUZZ JPEG
JSON LCMS2 LIBOTF LIBSELINUX 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 $LC_MONETARY: en_US.UTF-8
   value of $LC_NUMERIC: en_US.UTF-8
   value of $LC_TIME: root.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
   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 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
sendmail rfc2047 rfc2045 ietf-drums mm-util mail-prsvr mail-utils
misearch multi-isearch cl-extra cl-print byte-opt gv bytecomp
byte-compile cconv thingatpt help-fns radix-tree help-mode cl-loaddefs
cl-lib rmc 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 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 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 lcms2 multi-tty make-network-process
emacs)

Memory information:
((conses 16 50267 10716)
  (symbols 48 6002 0)
  (strings 32 18737 2250)
  (string-bytes 1 550849)
  (vectors 16 11492)
  (vector-slots 8 165468 12321)
  (floats 8 29 22)
  (intervals 56 274 0)
  (buffers 992 12))