bug#43148: 27.1; Widget text seems to disappear when building with Cairo and Xaw

[Basil L. Contovounesios]

Robert Pluim <rpluim@gmail.com> writes:

>>>>>> On Tue, 01 Sep 2020 17:09:18 +0300, Eli Zaretskii <eliz@gnu.org> said:
>
>     >> From: Pouar Dragon <pouar@pouar.net>
>     >> Date: Mon, 31 Aug 2020 21:34:46 -0500
>     >> 
>     >> widgets when building with Xaw and Cairo seem to have missing text,
>     >> looking like this
>     >> 
>     >> problem seems to go away when 5f4e8e2e088de9fb76cb631077c6eddd3219f594
>     >> is reverted
>
>     Eli> Thanks.  I hope Yamamoto-san will be able to take a look at this.
>
> Putting on my 'let's simplify' hat, is this really a combination we
> want to spend time on? Lucid + Xaw + Cairo is decidedly non-mainstream
> (Iʼm surprised it even builds).

FWIW, I've been happily using Lucid + Xaw3D for several years, and Cairo
ever since it became stable in Emacs 27 and the default configuration in
Emacs 28.

I usually have menu-bar-mode off, but like other reports in this thread,
the menus look fine when I do open them, e.g. after 'emacs -Q'.

Could the issue depend on e.g. the version of Cairo?  (I seem to have an
older version than the OP.)

-- 
Basil

In GNU Emacs 27.1.50 (build 1, x86_64-pc-linux-gnu, X toolkit, cairo version 
1.16.0, Xaw3d scroll bars)
 of 2020-11-24 built on thunk
Repository revision: dea3d6aa18e54f0d8d75cd219b511bac5b3c87b1
Repository branch: emacs-27
Windowing system distributor 'The X.Org Foundation', version 11.0.12008000
System Description: Debian GNU/Linux bullseye/sid

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

Configured using:
 'configure 'CC=ccache gcc' 'CFLAGS=-O0 -g3 -ggdb -gdwarf-4'
 --config-cache --prefix=/home/blc/.local --program-suffix=27
 --enable-checking=yes,glyphs --enable-check-lisp-object-type
 --with-x-toolkit=lucid --with-file-notification=yes --with-x
 --with-cairo'

Configured features:
XAW3D XPM JPEG TIFF GIF PNG RSVG CAIRO SOUND GPM DBUS GSETTINGS GLIB
NOTIFY INOTIFY ACL LIBSELINUX GNUTLS LIBXML2 FREETYPE HARFBUZZ M17N_FLT
LIBOTF ZLIB TOOLKIT_SCROLL_BARS LUCID X11 XDBE XIM MODULES THREADS
LIBSYSTEMD JSON PDUMPER LCMS2 GMP

Important settings:
  value of $LANG: en_IE.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
  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
  transient-mark-mode: t

Load-path shadows:
None found.

Features:
(shadow sort mail-extr emacsbug message rmc puny dired dired-loaddefs
format-spec rfc822 mml easymenu mml-sec password-cache epa derived epg
epg-config gnus-util rmail rmail-loaddefs text-property-search time-date
subr-x seq byte-opt gv 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
tooltip eldoc electric uniquify ediff-hook vc-hooks lisp-float-type
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 elisp-mode
lisp-mode prog-mode register page tab-bar menu-bar rfn-eshadow isearch
timer select scroll-bar mouse jit-lock font-lock syntax facemenu
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 charscript charprop
case-table epa-hook jka-cmpr-hook help simple abbrev obarray
cl-preloaded nadvice loaddefs button faces cus-face macroexp files
text-properties overlay sha1 md5 base64 format env code-pages mule
custom widget hashtable-print-readable backquote threads dbusbind
inotify lcms2 dynamic-setting system-font-setting font-render-setting
cairo x-toolkit x multi-tty make-network-process emacs)

Memory information:
((conses 16 44295 7865)
 (symbols 48 6001 1)
 (strings 32 16087 1428)
 (string-bytes 1 510797)
 (vectors 16 9271)
 (vector-slots 8 125328 6416)
 (floats 8 21 43)
 (intervals 56 227 0)
 (buffers 1000 11))