Subject: bug#9212: closed (Re: bug#9212: 24.0.50; Selective display broken in Emacs 24 trunk)

From: [email-masked] (GNU bug Tracking System)
Date: Mon, 01 Aug 2011 17:40:02 +0000

Your bug report

#9212: 24.0.50; Selective display broken in Emacs 24 trunk

which was filed against the emacs package, has been closed.

The explanation is attached below, along with your original report.
If you require more details, please reply to [email-masked].

-- 
9212: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=9212
GNU Bug Tracking System
Contact [email-masked] with problems

Subject: Re: bug#9212: 24.0.50; Selective display broken in Emacs 24 trunk
From: Eli Zaretskii <[email-masked]>
To: [email-masked]
Cc: [email-masked]
Date: Mon, 01 Aug 2011 20:36:27 +0300
List-Id: <debbugs-submit.debbugs.gnu.org>

> Date: Mon, 01 Aug 2011 04:30:09 -0400
> From: Eli Zaretskii <[email-masked]>
> Cc: [email-masked]
> 
> > Date: Mon, 1 Aug 2011 09:44:01 +0200
> > From: Anders Lindgren <[email-masked]>
> > 
> > alpha^Mbeta^Mgamma
> > delta
> > 
> > * Activeate selective display using "(setq selective-display t)".
> > 
> > * The following should be displayed:
> > 
> > alpha...
> > delta
> > 
> > * In the broken Emacs 24 trunk, the following is displayed:
> > 
> > alpha...delta
> 
> This is a bug in the bidirectional display engine: the problem goes
> away if you type "M-: (setq bidi-display-reordering nil) RET" in that
> buffer.
> 
> Thanks for the simple test case, I will work on fixing this as soon as
> I can.

Fixed in revision 105373 on the trunk.

Subject: 24.0.50; Selective display broken in Emacs 24 trunk
From: Anders Lindgren <[email-masked]>
To: [email-masked]
Date: Mon, 1 Aug 2011 09:44:01 +0200
List-Id: <debbugs-submit.debbugs.gnu.org>

"Selective display" (i.e. a technique used to hide sections of a buffer,
which has been around since, at least, Emacs 18) seems to be broken in
the trunk of Emacs 24.

Steps to verify this:

* Create a new buffer with the following content (where ^M should be the
  actual Carriage Return character, generated by C-q C-m):

alpha^Mbeta^Mgamma
delta

* Activeate selective display using "(setq selective-display t)".

* The following should be displayed:

alpha...
delta

* In the broken Emacs 24 trunk, the following is displayed:

alpha...delta

I noticed that this worked correctly as late as in early 2011.

Note that this will break a number of old, videly used, packaged like
"folding.el".

Sincerely,
    Anders Lindgren

In GNU Emacs 24.0.50.1 (i386-apple-darwin10.8.0, NS apple-appkit-1038.36)
 of 2011-07-31 on macpro.local
Windowing system distributor `Apple', version 10.3.1038
configured using `configure  '--with-ns''

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: nil
  value of $XMODIFIERS: nil
  locale-coding-system: nil
  default enable-multibyte-characters: t

Major mode: Emacs-Lisp

Minor modes in effect:
  shell-dirtrack-mode: t
  eldoc-mode: t
  global-auto-revert-mode: t
  global-cwarn-mode: t
  minibuffer-electric-file-mode: t
  recentf-mode: t
  msb-mode: t
  display-time-mode: t
  tooltip-mode: t
  mouse-wheel-mode: t
  menu-bar-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-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:
C-s C-s C-s C-s C-s C-s C-s C-a C-x p <help-echo> <down-mouse-1>
<mouse-1> C-x C-g C C-x u C-x C-f C h a <tab> <return>
<escape> < C-s s e l e c t i v e - d C-a <escape> <
C-s d i s p l a y C-s C-s C-s C-s C-s C-s C-s C-s C-s
C-s C-s C-s C-s C-s C-s C-s C-s C-s C-s C-s C-s C-s
C-s C-a C-x C-f <M-backspace> s r <tab> C h <tab> n
<tab> <return> C-s s e l e c r <backspace> t i v e
- <backspace> . * d <backspace> <backspace> <backspace>
<backspace> <backspace> <backspace> <backspace> <backspace>
<backspace> <backspace> <backspace> <backspace> <backspace>
C-s d i s p l a y C-a <escape> < C-s d i s p l a y
C-s C-s C-s C-s C-s C-s C-s C-a <down-mouse-1> <mouse-1>
C-x C-f ~ / t , <backspace> m p - <backspace> / s e
l e c t i v e - <backspace> d i s p ö a y . t x t <return>
V i s i b l 1 <backspace> <backspace> <backspace> <backspace>
<backspace> <backspace> <backspace> a l p h a C-q RET
b e t a C-q RET g a m m a C-q C-j d e l t a <return>
<escape> x d e <backspace> <backspace> s e l e c <tab>
i <tab> <backspace> <backspace> i <tab> <backspace>
<tab> C-g <escape> <escape> ( s e t q SPC s e l e v
t <backspace> <backspace> v <backspace> c t i M-- M--
+ <backspace> - d M-- SPC t ) <return> <escape> <escape>
<up> C-e <left> <backspace> n i l <return> <up> C-x
C-s <help-echo> <down-mouse-1> <mouse-1> <escape> x
r e p o <tab> r t <tab> <return>

Recent messages:
Mark set
Mark saved where search started
(New file)
Quit
Scanning for dabbrevs...100% [2 times]
t
nil
Saving file /Users/anders/tmp/selectivedispöay.txt...
Wrote /Users/anders/tmp/selectivedispöay.txt
Making completion list...

Load-path shadows:
~/emacs/lisp/table hides
/Volumes/HD3/build/emacs2/trunk/nextstep/Emacs.app/Contents/Resources/lisp/textmodes/table
~/emacs/lisp/ruby-mode hides
/Volumes/HD3/build/emacs2/trunk/nextstep/Emacs.app/Contents/Resources/lisp/progmodes/ruby-mode
~/emacs/src/asm-mode-new/src/asm-mode hides
/Volumes/HD3/build/emacs2/trunk/nextstep/Emacs.app/Contents/Resources/lisp/progmodes/asm-mode

Features:
(shadow sort gnus-util mail-extr message format-spec rfc822 mml 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 dabbrev pp vc-svn shell pcomplete grep compile multi-isearch
follow subword ctypes my-end-of-buffer-log doxygen c-electric-operator
c-indent-operator vc-dispatcher vc-bzr add-log help-mode debug eldoc
ps-print ps-def lpr autorevert folding-isearch folding view rdebug cwarn
prepaint cc-mode cc-fonts cc-guess cc-menus cc-cmds cc-styles cc-align
cc-engine cc-vars cc-defs tempo edg-mode tags-extra etags split-nways
toggle-file-read-only lockdir uniquify ange-ftp comint regexp-opt ring
paren mic-paren iso-insert minibuf-elfile easy-mmode recentf tree-widget
wid-edit easymenu msb edmacro kmacro warnings disp-table time advice
help-fns advice-preload cl time-date tooltip ediff-hook vc-hooks
lisp-float-type mwheel ns-win 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 ns multi-tty
emacs)