GNU bug report logs - #5805
23.1; abbrev-insert does not protext itself with save-excursion

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From: "Maguire, Andrew (GE Infra, Energy)" <andrew.maguire <at> ge.com>
To: 5805 <at> debbugs.gnu.org
Subject: bug#5805: Returned mail: Cannot send message within 3 days
Date: Tue, 30 Mar 2010 18:33:07 +0200

Try again...

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Sent: 29 March 2010 13:07
To: andrewma <at> Smallworld.co.uk
Subject: Returned mail: Cannot send message within 3 days

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From: andrew.maguire <at> ge.com
To: bug-gnu-emacs <at> gnu.org
Subject: 23.1; abbrev-insert does not protext itself with save-excursion
Reply-to: andrew.maguire <at> ge.com

I believe there is a regression/change of behaviour with the lisp
implementation
of the abbrev package compared with earlier Emacsen.

In our code we use abbrev to dynamically expand certain
keywords. However, the new lisp implementation is more
eager in finding things to check, ie. it is able to look back past
non-word characters to see if an abbrev is to be found.
In this situation it is essential to do save-excursion.

Ideally, either insert-abbrev should do a save-excursion itself or all
calls to it should.
In our code, expand-abbrev is call which internally calls abbrev-insert.

Alternatively, is it the recommendation for user code to surround all
"abbrev" calls with save-excursion now?

Thanks for you advice,
Andrwe Maguire


In GNU Emacs 23.1.1 (i386-mingw-nt5.1.2600)
 of 2009-07-30 on SOFT-MJASON
Windowing system distributor `Microsoft Corp.', version 5.1.2600
configured using `configure --with-gcc (4.4)'

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: ENG
  value of $XMODIFIERS: nil
  locale-coding-system: cp1252
  default-enable-multibyte-characters: t

Major mode: Gis

Minor modes in effect:
  shell-dirtrack-mode: t
  diff-auto-refine-mode: t
  show-paren-mode: t
  mouse-wheel-mode: t
  menu-bar-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  blink-cursor-mode: t
  global-auto-composition-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  line-number-mode: t
  transient-mark-mode: t
  abbrev-mode: t

Recent input:
! C-c C-c C-x C-f c b . e l <return> C-s M-p M-p M-p 
M-p M-p M-p M-p M-p M-p M-p C-g C-x 2 C-x b <up> <return> 
<prior> <prior> <prior> <prior> <prior> <prior> <prior> 
<prior> <down-mouse-1> <mouse-1> <down-mouse-1> <mouse-1> 
C-s C-w C-w C-w C-w C-w <help-echo> <down-mouse-1> 
<mouse-1> C-s C-s M-x <up> <return> SPC C-x v v SPC 
<down> <left> SPC C-k <S-insert> <down> <backspace> 
<backspace> <backspace> <backspace> <backspace> <backspace> 
<backspace> <backspace> <backspace> <backspace> <backspace> 
<backspace> <backspace> <backspace> <backspace> <backspace> 
<backspace> <backspace> <backspace> <backspace> <backspace> 
<backspace> <backspace> <backspace> <backspace> <backspace> 
<backspace> <backspace> <backspace> <S-insert> <left> 
<left> <backspace> 2 <up> <up> <up> C-a <C-right> <C-left> 
<left> C-x o <up> <C-left> <C-left> <left> M-x <up> 
<return> <help-echo> <down-mouse-1> <mouse-1> <double-down-mouse-1> 
<double-mouse-1> <triple-down-mouse-1> <triple-mouse-1> 
<help-echo> <down-mouse-2> <mouse-2> C-k C-k <tab> 
<help-echo> <down-mouse-1> <mouse-1> <wheel-down> <help-echo> 
<help-echo> <down-mouse-1> <mouse-1> <double-down-mouse-1> 
<double-mouse-1> <help-echo> <down-mouse-2> <mouse-2> 
<down-mouse-1> <mouse-1> <double-down-mouse-1> <double-mouse-1> 
C-w C-x C-s <wheel-up> <wheel-up> <wheel-up> <wheel-up> 
<double-wheel-up> <wheel-down> <double-wheel-down> 
<wheel-down> <wheel-down> C-x v v C-x b <return> C-M-b 
<prior> <prior> <up> <up> <up> <up> C-g C-x o <prior> 
<prior> <prior> <prior> M-x <up> <return> C-x v v M-p 
<up> <up> <C-right> <right> <right> C-k c b <M-prior> 
<M-prior> - m a g i k - e d i f f - m e t h o d s : 
SPC r e t a i n SPC w i n d o w SPC c o n f i g u r 
a t i o n SPC i f SPC m e t h o d SPC n o t SPC f o 
u n d C-c C-c <next> <down-mouse-1> <mouse-1> C-x k 
<return> <home> <C-home> <down> <down> <down> M-x e 
r a s e <tab> <return> SPC <f4> b C-x k <return> <help-echo> 
<help-echo> <help-echo> <help-echo> <help-echo> <help-echo> 
<menu-bar> <help-menu> <send-emacs-bug-report>

Recent messages:
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Mark set [2 times]
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