bug#13256: 24.1; auto-revert does not re-check encoding

[Reuben Thomas]

I use auto-revert-mode. If I run e.g. dos2unix on a buffer I'm editing,
it is reverted, but Emacs does not notice that the line ending encoding
has changed. Hence, continuing to edit and re-saving will undo the
unix2dos command.


In GNU Emacs 24.1.1 (x86_64-pc-linux-gnu, GTK+ Version 2.24.12)
 of 2012-09-22 on batsu, modified by Debian
Windowing system distributor `The X.Org Foundation', version 11.0.11300000
Configured using:
 `configure '--build' 'x86_64-linux-gnu' '--build' 'x86_64-linux-gnu'
 '--prefix=/usr' '--sharedstatedir=/var/lib' '--libexecdir=/usr/lib'
 '--localstatedir=/var/lib' '--infodir=/usr/share/info'
 '--mandir=/usr/share/man' '--with-pop=yes'
 
'--enable-locallisppath=/etc/emacs24:/etc/emacs:/usr/local/share/emacs/24.1/site-lisp:/usr/local/share/emacs/site-lisp:/usr/share/emacs/24.1/site-lisp:/usr/share/emacs/site-lisp'
 '--with-crt-dir=/usr/lib/x86_64-linux-gnu' '--with-x=yes'
 '--with-x-toolkit=gtk' '--with-toolkit-scroll-bars'
 'build_alias=x86_64-linux-gnu' 'CFLAGS=-g -O2 -fstack-protector
 --param=ssp-buffer-size=4 -Wformat -Werror=format-security -Wall -O2'
 'CPPFLAGS=-D_FORTIFY_SOURCE=2''

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: en_GB.UTF-8
  value of $LC_NUMERIC: en_GB.UTF-8
  value of $LC_TIME: en_GB.UTF-8
  value of $LANG: en_GB.UTF-8
  value of $XMODIFIERS: @im=none
  locale-coding-system: utf-8-unix
  default enable-multibyte-characters: t

Major mode: Text

Minor modes in effect:
  diff-auto-refine-mode: t
  TeX-PDF-mode: t
  shell-dirtrack-mode: t
  buffer-face-mode: t
  flyspell-mode: t
  smart-quotes-mode: t
  recentf-mode: t
  show-paren-mode: t
  server-mode: t
  savehist-mode: t
  minibuffer-electric-default-mode: t
  iswitchb-mode: t
  icomplete-mode: t
  global-auto-revert-mode: t
  desktop-save-mode: t
  tooltip-mode: t
  mouse-wheel-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
  column-number-mode: t
  line-number-mode: t
  transient-mark-mode: t

Recent input:
<backspace> C-x C-s C-c C-c <return> M-< C-s e d l 
a b e l C-a C-s b a r e l y <right> <left> <left> <left> 
<left> <left> C-s C-s C-s C-s C-s C-s C-s C-s C-s C-s 
<right> <left> <M-backspace> i s SPC b u t M-d <right> 
<right> <right> <right> <right> <right> <right> <right> 
<right> <right> <right> <right> <right> <right> <right> 
<right> <right> <left> <left> <left> <left> <left> 
a n d SPC t h i r t y <backspace> y - s i x SPC C-x 
C-s C-c C-c <return> C-s p u n SPC o n SPC C-a <down> 
<down> <down> <down> <down> <right> <right> <right> 
<right> <right> <right> <right> <right> <right> <right> 
<right> <right> <right> <right> <right> <right> <right> 
<right> <right> <right> <right> <right> <right> <right> 
) C-x C-s C-c C-c <return> <help-echo> <help-echo> 
C-x C-f ~ / N o t e <tab> T h i n g <tab> L e <tab> 
<return> C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n 
C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n 
C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n I r i a 
: S-SPC A – Z . <backspace> <return> C-x C-s <up> <up> 
<up> <up> <up> <up> <right> <right> <right> <right> 
<up> <right> <right> <right> <right> <right> <right> 
<right> <right> <right> <right> <right> <right> <right> 
<right> <right> <right> <M-backspace> <M-backspace> 
C-x C-s <left> <left> <backspace> <backspace> <backspace> 
G r a m p s C-x C-s C-n C-n C-n C-n C-n C-n C-n C-n 
C-n C-n C-n C-n C-n C-n C-n C-n C-n C-x k <return> 
C-x C-f <up> <return> M-> M-< M-> M-x r e p o r t b 
u <backspace> <backspace> - e m a c s - b u g <ret
urn>

Recent messages:
byte-code: End of buffer [27 times]
Saving file /home/rrt/Notes/Things Lent...
Wrote /home/rrt/Notes/Things Lent
Saving file /home/rrt/Notes/Things Lent...
Wrote /home/rrt/Notes/Things Lent
Saving file /home/rrt/Notes/Things Lent...
Wrote /home/rrt/Notes/Things Lent
Reverting buffer `Things Lent'.
byte-code: End of buffer [10 times]
Mark set [3 times]

Load-path shadows:
/home/rrt/local/share/emacs/site-lisp/dict hides 
/usr/share/emacs24/site-lisp/emacs-goodies-el/dict
/home/rrt/local/share/emacs/site-lisp/browse-kill-ring hides 
/usr/share/emacs24/site-lisp/emacs-goodies-el/browse-kill-ring
/home/rrt/.emacs.d/elpa/dictionary-1.8.7/link hides 
/usr/share/emacs24/site-lisp/dictionary-el/link
/home/rrt/.emacs.d/elpa/dictionary-1.8.7/dictionary hides 
/usr/share/emacs24/site-lisp/dictionary-el/dictionary
/home/rrt/.emacs.d/elpa/dictionary-1.8.7/dictionary-init hides 
/usr/share/emacs24/site-lisp/dictionary-el/dictionary-init
/home/rrt/.emacs.d/elpa/dictionary-1.8.7/connection hides 
/usr/share/emacs24/site-lisp/dictionary-el/connection
/usr/share/emacs24/site-lisp/auctex/multi-prompt hides 
/usr/share/emacs/site-lisp/auctex/multi-prompt
/usr/share/emacs24/site-lisp/auctex/latex hides 
/usr/share/emacs/site-lisp/auctex/latex
/usr/share/emacs24/site-lisp/auctex/texmathp hides 
/usr/share/emacs/site-lisp/auctex/texmathp
/usr/share/emacs24/site-lisp/auctex/tex-fold hides 
/usr/share/emacs/site-lisp/auctex/tex-fold
/usr/share/emacs24/site-lisp/auctex/tex-jp hides 
/usr/share/emacs/site-lisp/auctex/tex-jp
/usr/share/emacs24/site-lisp/auctex/preview hides 
/usr/share/emacs/site-lisp/auctex/preview
/usr/share/emacs24/site-lisp/auctex/tex-bar hides 
/usr/share/emacs/site-lisp/auctex/tex-bar
/usr/share/emacs24/site-lisp/auctex/tex-mik hides 
/usr/share/emacs/site-lisp/auctex/tex-mik
/usr/share/emacs24/site-lisp/auctex/toolbar-x hides 
/usr/share/emacs/site-lisp/auctex/toolbar-x
/usr/share/emacs24/site-lisp/auctex/tex hides 
/usr/share/emacs/site-lisp/auctex/tex
/usr/share/emacs24/site-lisp/auctex/prv-emacs hides 
/usr/share/emacs/site-lisp/auctex/prv-emacs
/usr/share/emacs24/site-lisp/auctex/context hides 
/usr/share/emacs/site-lisp/auctex/context
/usr/share/emacs24/site-lisp/auctex/tex-info hides 
/usr/share/emacs/site-lisp/auctex/tex-info
/usr/share/emacs24/site-lisp/auctex/tex-font hides 
/usr/share/emacs/site-lisp/auctex/tex-font
/usr/share/emacs24/site-lisp/auctex/tex-style hides 
/usr/share/emacs/site-lisp/auctex/tex-style
/usr/share/emacs24/site-lisp/auctex/bib-cite hides 
/usr/share/emacs/site-lisp/auctex/bib-cite
/usr/share/emacs24/site-lisp/auctex/font-latex hides 
/usr/share/emacs/site-lisp/auctex/font-latex
/usr/share/emacs24/site-lisp/auctex/context-nl hides 
/usr/share/emacs/site-lisp/auctex/context-nl
/usr/share/emacs24/site-lisp/auctex/plain-tex hides 
/usr/share/emacs/site-lisp/auctex/plain-tex
/usr/share/emacs24/site-lisp/auctex/context-en hides 
/usr/share/emacs/site-lisp/auctex/context-en
/usr/share/emacs24/site-lisp/auctex/tex-buf hides 
/usr/share/emacs/site-lisp/auctex/tex-buf
/usr/share/emacs/site-lisp/golang-mode/go-mode-load hides 
/usr/share/emacs/24.1/site-lisp/golang-mode/go-mode-load
/usr/share/emacs/site-lisp/golang-mode/go-mode hides 
/usr/share/emacs/24.1/site-lisp/golang-mode/go-mode
/usr/share/emacs/24.1/site-lisp/cmake-data/cmake-mode hides 
/usr/share/emacs/site-lisp/cmake-mode
/usr/share/emacs24/site-lisp/dictionaries-common/ispell hides 
/usr/share/emacs/24.1/lisp/textmodes/ispell
/usr/share/emacs24/site-lisp/dictionaries-common/flyspell hides 
/usr/share/emacs/24.1/lisp/textmodes/flyspell
/usr/share/emacs/site-lisp/rst hides /usr/share/emacs/24.1/lisp/textmodes/rst

Features:
(shadow sort gnus-util mail-extr emacsbug message format-spec rfc822 mml
mml-sec mm-decode mm-bodies mm-encode mail-parse rfc2231 mailabbrev
gmm-utils mailheader sendmail rfc2047 rfc2045 ietf-drums mm-util
mail-prsvr mail-utils thai-util thai-word mule-util lao-util js json
imenu sgml-mode locate thingatpt browse-url doc-view jka-compr
image-mode dired ps-mode diff-git diff-mode log-edit pcvs-util add-log
vc ediff-merg ediff-diff ediff-wind ediff-help ediff-util ediff-mult
ediff-init ediff vc-dispatcher texmathp preview prv-emacs warnings
tex-buf noutline outline font-latex byte-opt bytecomp byte-compile cconv
macroexp latex tex-style tex dbus xml latexenc sh-script executable
shell pcomplete grep etags newcomment multi-isearch help-mode view
nroff-mode autoconf autoconf-mode inform-mode make-mode cc-mode cc-fonts
cc-guess cc-menus cc-cmds cc-styles cc-align cc-engine cc-vars cc-defs
flymake compile comint ansi-color ring vc-git face-remap regexp-opt
flyspell ispell smart-quotes cperl-mode auto-dictionary-autoloads
c-eldoc-autoloads dictionary-autoloads diff-git-autoloads
dired-isearch-autoloads full-ack-autoloads guess-style-autoloads
kill-ring-search-autoloads magit-autoloads mv-shell-autoloads
tumble-autoloads http-post-simple-autoloads package tabulated-list
completing-help recentf tree-widget wid-edit uniquify paren server
savehist minibuf-eldef iswitchb icomplete autorevert desktop cus-start
cus-load ropemacs pymacs user-site-loaddefs advice advice-preload
yasnippet help-fns derived edmacro kmacro easymenu assoc cl go-mode-load
emacs-goodies-el emacs-goodies-custom emacs-goodies-loaddefs easy-mmode
preview-latex tex-site auto-loads time-date 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)

-- 
http://rrt.sc3d.org/