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address@hidden: Possible `point-entered' `point-left' Text Property Bug]

From: Richard Stallman
Subject: address@hidden: Possible `point-entered' `point-left' Text Property Bug]
Date: Sun, 16 Apr 2006 20:57:04 -0400

Would someone please fix this, and ack?

------- Start of forwarded message -------
From: David Hansen <address@hidden>
To: address@hidden
Organization: disorganized
Date: Wed, 12 Apr 2006 14:29:15 +0200
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Subject: Possible `point-entered' `point-left' Text Property Bug
X-Spam-Status: No, score=0.6 required=5.0 tests=HOT_NASTY autolearn=no 

Please write in English if possible, because the Emacs maintainers
usually do not have translators to read other languages for them.

Your bug report will be posted to the address@hidden mailing list.

Please describe exactly what actions triggered the bug
and the precise symptoms of the bug:

Eval in emacs -Q:

(defun prop-test (old new) (message "XXX: %d %d" old new))
(let ((buffer (generate-new-buffer "*prop tst*")))
  (with-current-buffer buffer
    (insert "1234567890\n1234567890\n")
    (put-text-property (point-min) (point-max) 'point-entered 'prop-test)
    (put-text-property (point-min) (point-max) 'point-left 'prop-test)
    (pop-to-buffer buffer)))

Now move up two lines.  You'll see the `message' for every
line you move up.  This doesn't happen if you move backward
character wise with C-b.

As far as i understand the documentation this shouldn't
happen for the line movement either as all chars have the
same `point-left' and `point-entered' text-property.


If emacs crashed, and you have the emacs process in the gdb debugger,
please include the output from the following gdb commands:
    `bt full' and `xbacktrace'.
If you would like to further debug the crash, please read the file
/home/dhansen/share/emacs/22.0.50/etc/DEBUG for instructions.

In GNU Emacs (i686-pc-linux-gnu)
 of 2006-04-05 on robotron
X server distributor `The X.Org Foundation', version 11.0.70000000
configured using `configure '--prefix=/home/dhansen' '--disable-sound' 
'--disable-pop' '--with-x-toolkit=no''

Important settings:
  value of $LC_ALL: nil
  value of $LC_COLLATE: nil
  value of $LC_CTYPE: en_US.UTF-8
  value of $LC_MESSAGES: nil
  value of $LC_MONETARY: nil
  value of $LC_NUMERIC: nil
  value of $LC_TIME: nil
  value of $LANG: en_US.UTF-8
  locale-coding-system: utf-8
  default-enable-multibyte-characters: t

Major mode: Lisp Interaction

Minor modes in effect:
  flyspell-mode: t
  jabber-activity-mode: t
  rcirc-track-minor-mode: t
  show-paren-mode: t
  iswitchb-mode: t
  auto-compression-mode: t
  mouse-wheel-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  unify-8859-on-encoding-mode: t
  utf-translate-cjk-mode: t
  line-number-mode: t

Recent input:
C-M-SPC M-w C-n C-y M-b M-b C-b C-b <M-backspace> l 
e f t C-e C-b <return> ( p o p - t o - b u f f e r 
SPC b u f f e r C-e ) C-p C-p C-p C-p C-p C-p C-e C-x 
C-e C-n C-n C-n C-n C-n C-n C-x C-e C-p C-p C-n C-p 
C-n C-p C-n C-n C-p C-p C-n C-n C-p C-p C-x o C-x 1 
<switch-frame> C-x 1 <switch-frame> C-x C-e C-p C-p 
C-n C-n C-x o C-x 1 M-x r e p <tab> o <tab> r <tab> 
b <tab> <return>

Recent messages:
XXX: 23 12
XXX: 12 1
#<buffer *prop tst*<2>>
XXX: 1 12
XXX: 23 12
XXX: 12 1
XXX: 1 12 [2 times]
XXX: 1 23
Making completion list... [2 times]
Loading emacsbug...done

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