Subject: bug#30129: 25.3; ibuffer sorting order does not return to normal after using `ibuffer-invert-sorting' twice

From: Windy Tusooa <[email-masked]>
Date: Mon, 15 Jan 2018 14:55:49 +0000

Severity: normal

In ibuffer-mode, the command `ibuffer-invert-sorting’ reverse the order of buffers. But when the command is used the second time, the order does not return to normal.

In GNU Emacs 25.3.1 (x86_64-w64-mingw32)
of 2017-09-27 built on LAPHROAIG
Windowing system distributor 'Microsoft Corp.', version 10.0.15063
Configured using:
'configure --without-dbus --without-compress-install 'CFLAGS=-O2
-static -g3' PKG_CONFIG_PATH=/mingw64/lib/pkgconfig'

Configured features:
XPM JPEG TIFF GIF PNG RSVG SOUND NOTIFY ACL GNUTLS LIBXML2 ZLIB
TOOLKIT_SCROLL_BARS

Important settings:
  value of $LANG: CHS
  locale-coding-system: cp936

Major mode: IBuffer

Minor modes in effect:
  tooltip-mode: t
  global-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
  buffer-read-only: t
  line-number-mode: t
  transient-mark-mode: t

Recent messages:
Formats have changed, recompiling...done
Updating buffer list...done
Commands: m, u, t, RET, g, k, S, D, Q; q to quit; h for help
Sorting order reversed
Sorting order normal
Sorting order reversed
Sorting order normal
Making completion list...
Quit
Making completion list...

Load-path shadows:
None found.

Features:
(shadow sort mail-extr emacsbug message dired format-spec rfc822 mml
mml-sec password-cache epg epg-config gnus-util mm-decode mm-bodies
mm-encode mail-parse rfc2231 mailabbrev gmm-utils mailheader sendmail
rfc2047 rfc2045 ietf-drums mm-util help-fns help-mode easymenu
cl-loaddefs pcase cl-lib mail-prsvr mail-utils ibuf-ext ibuffer
time-date mule-util china-util tooltip eldoc electric uniquify
ediff-hook vc-hooks lisp-float-type mwheel dos-w32 ls-lisp disp-table
w32-win w32-vars term/common-win tool-bar dnd fontset image regexp-opt
fringe tabulated-list newcomment elisp-mode lisp-mode prog-mode register
page menu-bar rfn-eshadow timer select scroll-bar mouse jit-lock
font-lock syntax facemenu font-core frame 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 charscript case-table epa-hook
jka-cmpr-hook help simple abbrev minibuffer 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 w32notify w32 multi-tty
make-network-process emacs)

Memory information:
((conses 16 95668 11237)
(symbols 56 20053 0)
(miscs 48 55 117)
(strings 32 17286 3515)
(string-bytes 1 471856)
(vectors 16 13646)
(vector-slots 8 489273 9496)
(floats 8 160 60)
(intervals 56 403 0)
(buffers 976 19))