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font-lock-default-fontify-region loops forever

From: David Hansen
Subject: font-lock-default-fontify-region loops forever
Date: Thu, 15 Feb 2007 10:28:12 +0100
User-agent: Gnus/5.110006 (No Gnus v0.6) Emacs/22.0.93 (gnu/linux)

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:

To trigger this bug `push' some other function to
`font-lock-extend-region-functions' (should be *before*
`font-lock-extend-region-wholelines' in this list).


Just test for `eobp' in `font-lock-extend-region-wholelines':

(unless (or (bolp) (eobp))
  (setq changed t font-lock-end (line-beginning-position 2)))

instead of just

(unless (bolp) (setq changed t font-lock-end (line-beginning-position 2)))

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/22.0.93/etc/DEBUG for instructions.

In GNU Emacs (i686-pc-linux-gnu, X toolkit)
 of 2007-01-30 on robotron
X server distributor `The X.Org Foundation', version 11.0.70101000
configured using `configure  '--disable-sound' '--prefix=/home/dhansen' 
'--without-toolkit-scroll-bars' '--disable-pop''

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: Emacs-Lisp

Minor modes in effect:
  shell-dirtrack-mode: t
  erc-menu-mode: t
  erc-ring-mode: t
  erc-pcomplete-mode: t
  erc-netsplit-mode: t
  erc-spelling-mode: t
  erc-truncate-mode: t
  paredit-mode: t
  jabber-activity-mode: t
  erc-services-mode: t
  erc-autojoin-mode: t
  erc-track-mode: t
  erc-match-mode: t
  erc-button-mode: t
  erc-fill-mode: t
  erc-stamp-mode: t
  erc-smiley-mode: t
  erc-irccontrols-mode: t
  erc-noncommands-mode: t
  erc-readonly-mode: t
  erc-scrolltobottom-mode: t
  eldoc-mode: t
  which-function-mode: t
  show-paren-mode: t
  iswitchb-mode: t
  tooltip-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
  auto-compression-mode: t
  line-number-mode: t
  abbrev-mode: 1
  hs-minor-mode: t

Recent input:
C-n C-n C-n C-n C-n C-n C-u C-M-x <C-tab> M-x M-p M-p 
<return> n n n n n n n n n n n n n n n n n n n n n 
n n n n n n n n n n n n n n n n n n n n n n G <C-tab> 
C-M-x C-x 1 C-p C-p C-p C-p C-p C-p C-p C-p C-p C-p 
C-p C-p C-p C-p C-p C-p C-p C-p C-p C-p C-n C-n C-n 
C-n M-x r e p <tab> o <tab> r <tab> e m <tab> b <tab> 

Recent messages:
Result: 16790 (#o40626, #x4196) [3 times]
Fontifying lua-mode.el... (regexps....................)
Making completion list... [2 times]
Loading emacsbug...done
No completions of font-lock-default-fon
Completing command name...
No completions of font-lock-default-fon

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