bug#8919: 24.0.50; Ever-changing frame size for GTK3 toolkit on a KDE4 desktop

[Dirk Ullrich <dirk.ullrich@googlemail.com>]

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Please write in English if possible, because the Emacs maintainers
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Please describe exactly what actions triggered the bug
and the precise symptoms of the bug.  If you can, give
a recipe starting from `emacs -Q':

1. Compile Emacs from Bzr repository with the GTK3 toolkit.
2. Start Emacs on a KDE4 desktop.
3. Starting to use Emacs dimish its frame size, and the frame size is
changing with nearly every command.

Remark: Using the GTK2 toolkit avoids this bug. Maybe it is caused by
the following change reported in `src/ChangeLog':
2011-06-14  Jan Djärv  <jan.h.d@swipnet.se>

	* xfns.c (x_set_scroll_bar_default_width): Remove argument to
	xg_get_default_scrollbar_width.

	* gtkutil.c: Include emacsgtkfixed.h if HAVE_GTK3.
	(int_gtk_range_get_value): Move to the scroll bar part of the file.
	(style_changed_cb): Call update_theme_scrollbar_width and call
	x_set_scroll_bar_default_width and xg_frame_set_char_size for
	all frames (Bug#8505).
	(xg_create_frame_widgets): Call emacs_fixed_new if HAVE_GTK3 (Bug#8505).
	Call gtk_window_set_resizable if HAVE_GTK3.
	(x_wm_set_size_hint): Call emacs_fixed_set_min_size with min width
	and height if HAVE_GTK3 (Bug#8505).
	(scroll_bar_width_for_theme): New variable.
	(update_theme_scrollbar_width): New function.
	(xg_get_default_scrollbar_width): Move code to
	update_theme_scrollbar_width, just return scroll_bar_width_for_theme.
	(xg_initialize): Call update_theme_scrollbar_width.

	* gtkutil.h (xg_get_default_scrollbar_width): Remove argument.

	* emacsgtkfixed.c, emacsgtkfixed.h: New files.


If Emacs crashed, and you have the Emacs process in the gdb debugger,
please include the output from the following gdb commands:
    `bt full' and `xbacktrace'.
For information about debugging Emacs, please read the file
/usr/share/emacs/24.0.50/etc/DEBUG.


In GNU Emacs 24.0.50.1 (x86_64-unknown-linux-gnu, GTK+ Version 3.0.11)
 of 2011-06-22 on red
Windowing system distributor `The X.Org Foundation', version 11.0.11002000
configured using `configure  '--prefix=/usr' '--sysconfdir=/etc'
'--localstatedir=/var' '--libexecdir=/usr/lib'
'--mandir=/usr/share/man' '--without-sound' '--with-x-toolkit=gtk3'
'CFLAGS=-march=x86-64 -mtune=generic -O2 -pipe'
'LDFLAGS=-Wl,--hash-style=gnu -Wl,--as-needed''

Important settings:
  value of $LC_ALL: nil
  value of $LC_COLLATE: nil
  value of $LC_CTYPE: nil
  value of $LC_MESSAGES: nil
  value of $LC_MONETARY: nil
  value of $LC_NUMERIC: nil
  value of $LC_TIME: nil
  value of $LANG: de_DE.UTF-8
  value of $XMODIFIERS: nil
  locale-coding-system: utf-8-unix
  default enable-multibyte-characters: t

Major mode: Lisp Interaction

Minor modes in effect:
  tooltip-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
  transient-mark-mode: t

Recent input:
M-x r e p o r t <tab> <return>

Recent messages:
For information about GNU Emacs and the GNU system, type C-h C-a.

Load-path shadows:
/usr/share/emacs/site-lisp/coq-db hides
/usr/share/emacs/site-lisp/ProofGeneral/coq/coq-db
/usr/share/emacs/site-lisp/coq-syntax hides
/usr/share/emacs/site-lisp/ProofGeneral/coq/coq-syntax
/usr/share/emacs/site-lisp/coq hides
/usr/share/emacs/site-lisp/ProofGeneral/coq/coq

Features:
(shadow sort gnus-util time-date mail-extr message idna sendmail
regexp-opt format-spec rfc822 mml easymenu mml-sec mm-decode mm-bodies
mm-encode mail-parse rfc2231 rfc2047 rfc2045 ietf-drums mm-util
mail-prsvr mailabbrev mail-utils gmm-utils mailheader emacsbug tooltip
ediff-hook vc-hooks lisp-float-type mwheel x-win x-dnd tool-bar dnd
fontset image fringe lisp-mode register page menu-bar rfn-eshadow timer
select scroll-bar mouse jit-lock font-lock syntax facemenu font-core
frame cham georgian utf-8-lang misc-lang vietnamese tibetan thai
tai-viet lao korean japanese hebrew greek romanian slovak czech european
ethiopic indian cyrillic chinese case-table epa-hook jka-cmpr-hook help
simple abbrev minibuffer loaddefs button faces cus-face files
text-properties overlay sha1 md5 base64 format env code-pages mule
custom widget hashtable-print-readable backquote make-network-process
dbusbind dynamic-setting system-font-setting font-render-setting
move-toolbar gtk x-toolkit x multi-tty emacs)