GNU bug report logs - #53218
27.2; image garbage display

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: awrhygty <at> outlook.com
To: bug-gnu-emacs <at> gnu.org
Subject: 27.2; image garbage display
Date: Thu, 13 Jan 2022 02:30:29 +0900

Evaluate the form below, a red rectangle remains in the lower half of
the window.

(let ((buf (generate-new-buffer "tmp")))
  (switch-to-buffer buf)
  (progn (insert "\nx")
         (goto-char (point-min)))
  (redisplay)
  (let* ((pbm (format "P1\n1 1\n1"))
         (red  (create-image pbm 'pbm t :foreground "red"
                             :height 400 :sacle 1)))
    (insert-image red))
  (redisplay)
  (delete-char -1))


In GNU Emacs 27.2 (build 1, x86_64-w64-mingw32)
 of 2021-03-26 built on CIRROCUMULUS
Repository revision: deef5efafb70f4b171265b896505b92b6eef24e6
Repository branch: HEAD
Windowing system distributor 'Microsoft Corp.', version 10.0.19043
System Description: Microsoft Windows 10 Pro (v10.0.2009.19043.1415)

Recent messages:

Configured using:
 'configure --without-dbus --host=x86_64-w64-mingw32
 --without-compress-install 'CFLAGS=-O2 -static''

Configured features:
XPM JPEG TIFF GIF PNG RSVG SOUND NOTIFY W32NOTIFY ACL GNUTLS LIBXML2
HARFBUZZ ZLIB TOOLKIT_SCROLL_BARS MODULES THREADS JSON PDUMPER LCMS2 GMP

Important settings:
  value of $LANG: JPN
  locale-coding-system: cp932

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:
(misearch multi-isearch gnutls network-stream nsm mailalias smtpmail
auth-source cl-seq eieio eieio-core cl-macs eieio-loaddefs json map
tabify help-mode pp 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 term/bobcat japan-util
tooltip eldoc electric uniquify ediff-hook vc-hooks lisp-float-type
mwheel dos-w32 ls-lisp disp-table term/w32-win w32-win w32-vars
term/common-win 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 w32notify w32 lcms2 multi-tty make-network-process
emacs)

Memory information:
((conses 16 68747 12480)
 (symbols 48 7265 6)
 (strings 32 20743 2383)
 (string-bytes 1 672033)
 (vectors 16 13492)
 (vector-slots 8 238806 20350)
 (floats 8 25 304)
 (intervals 56 1280 0)
 (buffers 1000 17))

Message #10 received at 53218-done <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: awrhygty <at> outlook.com
Cc: 53218-done <at> debbugs.gnu.org
Subject: Re: bug#53218: 27.2; image garbage display
Date: Wed, 12 Jan 2022 21:17:47 +0200

> From: awrhygty <at> outlook.com
> Date: Thu, 13 Jan 2022 02:30:29 +0900
> 
> 
> Evaluate the form below, a red rectangle remains in the lower half of
> the window.
> 
> (let ((buf (generate-new-buffer "tmp")))
>   (switch-to-buffer buf)
>   (progn (insert "\nx")
>          (goto-char (point-min)))
>   (redisplay)
>   (let* ((pbm (format "P1\n1 1\n1"))
>          (red  (create-image pbm 'pbm t :foreground "red"
>                              :height 400 :sacle 1)))
>     (insert-image red))
>   (redisplay)
>   (delete-char -1))

I can reproduce this in Emacs 27.2, but not in Emacs 28 or 29.

So I guess this problem was already fixed since Emacs 27.2, and I'm
closing this bug report.

Thanks.

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