GNU bug report logs - #6540
23.2; Crash on large file when `cache-long-line-scans' is set and point moved to eob

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: David Maus <dmaus <at> ictsoc.de>
To: bug-gnu-emacs <at> gnu.org
Subject: 23.2;
	Crash on large file when `cache-long-line-scans' is set and point
	moved to eob
Date: Wed, 30 Jun 2010 14:29:12 +0200

This bug report will be sent to the Free Software Foundation,
not to your local site managers!
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 bug-gnu-emacs <at> gnu.org mailing list,
and to the gnu.emacs.bug news group.

Please describe exactly what actions triggered the bug
and the precise symptoms of the bug.  If you can, give
a recipe starting from `emacs -Q':

Steps to reproduce:

 - emacs -Q

 - (setq-default cache-long-line-scan t)
   C-x C-e

 - open large text file, for instance:

   http://lists.gnu.org/archive/html/emacs-orgmode/2010-06/txtdncL72Jcr7.txt

 - C-<end>

This was first reported by Ian Szewczyk on emacs-orgmode mailing
list[1] to happen with

GNU Emacs 23.2.1 (i386-mingw-nt5.1.2600)
 of 2010-05-08 on G41R2F1

too.

Best,
  -- David

[1] http://thread.gmane.org/gmane.emacs.orgmode/26806

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'.
For information about debugging Emacs, please read the file
/usr/share/emacs/23.2/etc/DEBUG.


In GNU Emacs 23.2.1 (i486-pc-linux-gnu, GTK+ Version 2.20.0)
 of 2010-05-16 on raven, modified by Debian
Windowing system distributor `The X.Org Foundation', version 11.0.10707000
configured using `configure  '--build' 'i486-linux-gnu' '--build' 'i486-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/emacs23:/etc/emacs:/usr/local/share/emacs/23.2/site-lisp:/usr/local/share/emacs/site-lisp:/usr/share/emacs/23.2/site-lisp:/usr/share/emacs/site-lisp:/usr/share/emacs/23.2/leim' '--with-x=yes' '--with-x-toolkit=gtk' '--with-toolkit-scroll-bars' 'build_alias=i486-linux-gnu' 'CFLAGS=-DDEBIAN -g -O2' 'LDFLAGS=-g' 'CPPFLAGS=''

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: de_DE.UTF-8
  value of $XMODIFIERS: nil
  locale-coding-system: utf-8-unix
  default enable-multibyte-characters: t

Major mode: Org-Agenda Week Ddl Grid Habit

Minor modes in effect:
  erc-services-mode: t
  erc-networks-mode: t
  diff-auto-refine-mode: t
  server-mode: t
  iswitchb-mode: t
  tooltip-mode: t
  mouse-wheel-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  blink-cursor-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  line-number-mode: t
  transient-mark-mode: t

Recent input:
<tab> q C-c a a s q C-c a o <C-end> <up> <up> <up> 
<up> <up> <up> <up> <up> <up> <up> <up> <up> <up> <up> 
C-c C-t D r q C-c a a <down> <down> <down> <down> <tab> 
<up> <down> <down> <up> <up> <tab> <tab> <down> <down> 
<down> <down> <tab> <right> <right> <tab> <up> <tab> 
<tab> <down> C-c C-x TAB C-c C-t D <S-iso-lefttab> 
C-c a a s w q C-c a n <down> <down> <down> <down> <down> 
<down> <down> <down> <down> <down> <down> I M-x b u 
g - r e <tab> <backspace> <backspace> <backspace> <backspace> 
<backspace> <backspace> <backspace> <backspace> <backspace> 
<backspace> <backspace> <backspace> <backspace> <backspace> 
r e p o <tab> r t <tab> <return>

Recent messages:
Rebuilding agenda buffer...done
Switched to week view
Press key for agenda command (unrestricted):
projects.org/XXXXXXXXXXXXXXXXXXXXX
projects.org/XXXXXXXXXXXXXXXXXXXXX
projects.org/XXXXXXXXXXXXXXXXXXXXX
projects.org/XXXXXXXXXXXXXXXXXXXXX
todo.org/ [7 times]
Clock starts at [2010-06-30 Mi 14:13] - showing entire task time.
Making completion list...

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~/.emacs.d/site-lisp/emacs-w3m/sb-jpilot hides /usr/share/emacs23/site-lisp/w3m/shimbun/sb-jpilot
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~/.emacs.d/site-lisp/emacs-w3m/sb-redhat hides /usr/share/emacs23/site-lisp/w3m/shimbun/sb-redhat
~/.emacs.d/site-lisp/emacs-w3m/sb-yomiuri-html hides /usr/share/emacs23/site-lisp/w3m/shimbun/sb-yomiuri-html
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~/.emacs.d/site-lisp/emacs-w3m/sb-makanai hides /usr/share/emacs23/site-lisp/w3m/shimbun/sb-makanai
~/.emacs.d/site-lisp/emacs-w3m/sb-the-onion hides /usr/share/emacs23/site-lisp/w3m/shimbun/sb-the-onion
~/code/org-mode/git/contrib/lisp/htmlize hides /usr/share/emacs23/site-lisp/emacs-goodies-el/htmlize
/usr/share/emacs/23.2/site-lisp/auctex/tex-info hides /usr/share/emacs/site-lisp/auctex/tex-info
/usr/share/emacs/23.2/site-lisp/auctex/context-nl hides /usr/share/emacs/site-lisp/auctex/context-nl
/usr/share/emacs/23.2/site-lisp/auctex/context-en hides /usr/share/emacs/site-lisp/auctex/context-en
/usr/share/emacs/23.2/site-lisp/auctex/latex hides /usr/share/emacs/site-lisp/auctex/latex
/usr/share/emacs/23.2/site-lisp/auctex/tex-mik hides /usr/share/emacs/site-lisp/auctex/tex-mik
/usr/share/emacs/23.2/site-lisp/auctex/tex-buf hides /usr/share/emacs/site-lisp/auctex/tex-buf
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/usr/share/emacs/23.2/site-lisp/auctex/context hides /usr/share/emacs/site-lisp/auctex/context
/usr/share/emacs/23.2/site-lisp/auctex/font-latex hides /usr/share/emacs/site-lisp/auctex/font-latex
/usr/share/emacs/23.2/site-lisp/auctex/bib-cite hides /usr/share/emacs/site-lisp/auctex/bib-cite
/usr/share/emacs/23.2/site-lisp/auctex/toolbar-x hides /usr/share/emacs/site-lisp/auctex/toolbar-x
/usr/share/emacs/23.2/site-lisp/auctex/tex-style hides /usr/share/emacs/site-lisp/auctex/tex-style
/usr/share/emacs/23.2/site-lisp/debian-startup hides /usr/share/emacs/site-lisp/debian-startup
/usr/share/emacs23/site-lisp/semi/pgg-pgp5 hides /usr/share/emacs/23.2/lisp/pgg-pgp5
/usr/share/emacs23/site-lisp/semi/pgg-def hides /usr/share/emacs/23.2/lisp/pgg-def
/usr/share/emacs23/site-lisp/flim/sha1 hides /usr/share/emacs/23.2/lisp/sha1
/usr/share/emacs23/site-lisp/semi/pgg hides /usr/share/emacs/23.2/lisp/pgg
/usr/share/emacs23/site-lisp/semi/pgg-pgp hides /usr/share/emacs/23.2/lisp/pgg-pgp
/usr/share/emacs23/site-lisp/semi/pgg-gpg hides /usr/share/emacs/23.2/lisp/pgg-gpg
/usr/share/emacs23/site-lisp/flim/hex-util hides /usr/share/emacs/23.2/lisp/hex-util
/usr/share/emacs23/site-lisp/flim/md4 hides /usr/share/emacs/23.2/lisp/md4
/usr/share/emacs23/site-lisp/semi/pgg-parse hides /usr/share/emacs/23.2/lisp/pgg-parse
/usr/share/emacs23/site-lisp/dictionaries-common/flyspell hides /usr/share/emacs/23.2/lisp/textmodes/flyspell
/usr/share/emacs23/site-lisp/dictionaries-common/ispell hides /usr/share/emacs/23.2/lisp/textmodes/ispell
~/.emacs.d/site-lisp/org-mode/org-feed hides /usr/share/emacs/23.2/lisp/org/org-feed
~/.emacs.d/site-lisp/org-mode/org-wl hides /usr/share/emacs/23.2/lisp/org/org-wl
~/.emacs.d/site-lisp/org-mode/org-vm hides /usr/share/emacs/23.2/lisp/org/org-vm
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~/.emacs.d/site-lisp/org-mode/org hides /usr/share/emacs/23.2/lisp/org/org
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~/.emacs.d/site-lisp/org-mode/org-footnote hides /usr/share/emacs/23.2/lisp/org/org-footnote
~/.emacs.d/site-lisp/org-mode/org-jsinfo hides /usr/share/emacs/23.2/lisp/org/org-jsinfo
~/.emacs.d/site-lisp/org-mode/org-id hides /usr/share/emacs/23.2/lisp/org/org-id
~/.emacs.d/site-lisp/org-mode/org-mac-message hides /usr/share/emacs/23.2/lisp/org/org-mac-message
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~/.emacs.d/site-lisp/org-mode/org-mouse hides /usr/share/emacs/23.2/lisp/org/org-mouse
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~/.emacs.d/site-lisp/org-mode/org-install hides /usr/share/emacs/23.2/lisp/org/org-install
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~/.emacs.d/site-lisp/wl/utf7 hides /usr/share/emacs/23.2/lisp/gnus/utf7

Features:
(shadow org-table wl-mime mime-edit pgg-parse pccl pccl-20 signature
mail-utils mime-setup mail-mime-setup semi-setup mime-pgp pgg-def
mime-play filename mime-image elmo-pop3 sb-rss-hash sb-namazu
sb-mailman sb-heise sb-emacswiki sb-atom-hash sb-hash sb-atom sb-rss
xml elmo-shimbun shimbun w3m browse-url doc-view jka-compr image-mode
w3m-hist w3m-fb w3m-ems w3m-ccl ccl w3m-favicon w3m-image w3m-proc
w3m-util elmo-nntp modb-standard elmo-maildir elmo-imap4 time-stamp
elmo-net elmo-dop elmo-cache elmo-map elmo-filter emacsbug help-mode
org-clock org-colview cal-iso vc-git org-indent org-wl org-w3m org-vm
org-rmail org-mhe org-mew org-irc org-jsinfo org-infojs org-html
org-info org-gnus org-docview org-bibtex org-bbdb org-habit
erc-services erc-networks erc-goodies erc erc-backend erc-compat
format-spec grammar org-issue org-publish org-latex org-export-latex
org-beamer org-exp ob-exp org-exp-blocks org-agenda footnote remember
org-remember org-datetree org-id diary-lib diary-loaddefs org-depend
org-protocol org-inlinetask org-checklist org ob-emacs-lisp ob-keys
ob-comint comint ob-tangle ob-ref ob-lob ob-table ob org-footnote
org-src org-list org-faces org-compat org-entities org-macs noutline
outline cal-menu calendar cal-loaddefs org-install mu-cite yaoddmuse
skeleton sgml-mode bbdb-wl bbdb-hooks mail-parse rfc2231 rfc2047
rfc2045 qp ietf-drums time-date bbdb-com warnings mailabbrev bbdb
wl-spam elmo-spam elsp-header elsp-generic mime-w3m embeddedchangelog
embedded-changelog paredit magit ediff-merg ediff-diff ediff-wind
ediff-help ediff-util ediff-mult ediff-init ediff pcomplete diff-mode
log-edit ring pcvs-util add-log eldoc wl-demo wl-draft eword-encode
wl-template sendmail wl-news derived wl-address wl-thread wl-action
wl-summary ps-print ps-def lpr wl-refile wl-message elmo-mime
mmelmo-buffer mmelmo-imap mime-view mime-conf calist semi-def mmimap
mime-parse mmbuffer mmgeneric wl-highlight elmo-multi wl-folder wl
wl-e21 wl-util pp elmo-flag elmo-localdir wl-vars epg-config
wl-version elmo elmo-signal elmo-msgdb modb modb-generic modb-entity
mime elmo-util emu invisible inv-23 poem poem-e20 poem-e20_3 utf7
eword-decode mel mime-def std11 mcharset mcs-20 mcs-e20 pces pces-e20
pces-20 broken pcustom elmo-date path-util elmo-vars poe elmo-version
luna elscreen-wl elscreen-w3m elscreen-dired elscreen-color-theme
mule-util alist pym static apel-ver product elscreen byte-opt flyspell
ispell rfcview view goto-addr pwsafe midnight boxquote rect
auto-install edmacro kmacro thingatpt bytecomp byte-compile find-func
dired regexp-opt url url-proxy url-privacy url-expand url-methods
url-history url-cookie url-util url-parse timezone url-vars mm-util
mail-prsvr mailcap package reporter info color-theme easymenu wid-edit
cl cl-19 server iswitchb debian-el debian-el-loaddefs w3m-load
emacs-goodies-el emacs-goodies-custom emacs-goodies-loaddefs
easy-mmode dpkg-dev-el dpkg-dev-el-loaddefs develock advice help-fns
advice-preload bbdb-autoloads preview-latex tex-site auto-loads
tooltip ediff-hook vc-hooks lisp-float-type mwheel x-win x-dnd
font-setting tool-bar dnd fontset image fringe lisp-mode register page
menu-bar rfn-eshadow timer select scroll-bar mldrag 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 loaddefs button
minibuffer faces cus-face files text-properties overlay md5 base64
format env code-pages mule custom widget hashtable-print-readable
backquote make-network-process dbusbind system-font-setting
font-render-setting gtk x-toolkit x multi-tty emacs)

Message #8 received at 6540 <at> debbugs.gnu.org (full text, mbox):

From: oCameLo <camel322 <at> gmail.com>
To: 6540 <at> debbugs.gnu.org
Subject: 23.2; 23.2.1 (i386-mingw-nt6.1.7600) crashes too
Date: Mon, 24 Jan 2011 22:56:47 +0800

Steps to reproduce:

 - emacs -q

 - (setq cache-long-line-scans t)
   C-x C-e

 - (insert (prin1-to-string (x-list-fonts "*")))
   C-j

GDB output (xbacktrace didn't work):


GNU gdb (GDB) 7.2
Copyright (C) 2010 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "mingw32".
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>.
Attaching to process 4052
[New Thread 4052.0xe48]
[New Thread 4052.0x7a8]
[New Thread 4052.0x7e0]
[New Thread 4052.0xf10]
[New Thread 4052.0x408]
[New Thread 4052.0x77c]
[New Thread 4052.0xd18]
Reading symbols from
D:\Progs\Editor\Emacs\emacs-23.2\bin\emacs.exe...(no debugging symbols
found)...done.
[Switching to Thread 4052.0xd18]
SIGINT is used by the debugger.
Are you sure you want to change it? (y or n) [answered Y; input not
from terminal]
Environment variable "DISPLAY" not defined.
TERM = xterm
(gdb) .gdbinit:1336: Error in sourced command file:
No struct type named Lisp_Symbol.
continue
Continuing.

Program received signal SIGTRAP, Trace/breakpoint trap.
[Switching to Thread 4052.0xe48]
0x75f8194c in KERNELBASE!DeleteAce () from C:\Windows\system32\KernelBase.dll
(gdb) bt full
#0  0x75f8194c in KERNELBASE!DeleteAce () from
C:\Windows\system32\KernelBase.dll
No symbol table info available.
#1  0x011cb008 in w32_abort ()
No symbol table info available.
#2  0x0119e5f9 in set_cache_region ()
No symbol table info available.
#3  0x0119eceb in know_region_cache ()
No symbol table info available.
#4  0x01140b05 in scan_buffer ()
No symbol table info available.
#5  0x01140f78 in find_next_newline_no_quit ()
No symbol table info available.
#6  0x01039a93 in back_to_previous_line_start ()
No symbol table info available.
#7  0x01039d67 in back_to_previous_visible_line_start ()
No symbol table info available.
#8  0x0103e550 in move_it_vertically_backward ()
No symbol table info available.
#9  0x0104b35f in redisplay_window ()
No symbol table info available.
#10 0x0104750e in redisplay_window_0 ()
No symbol table info available.
#11 0x010210e4 in internal_condition_case_1 ()
No symbol table info available.
#12 0x010474ab in redisplay_windows ()
No symbol table info available.
#13 0x01046622 in redisplay_internal ()
No symbol table info available.
#14 0x01044d76 in redisplay ()
No symbol table info available.
#15 0x01008c63 in read_char ()
No symbol table info available.
#16 0x01012857 in read_key_sequence ()
No symbol table info available.
#17 0x01006523 in command_loop_1 ()
No symbol table info available.
#18 0x01020fd4 in internal_condition_case ()
No symbol table info available.
#19 0x01005f66 in command_loop_2 ()
No symbol table info available.
#20 0x01020ac5 in internal_catch ()
No symbol table info available.
#21 0x01005f1c in command_loop ()
No symbol table info available.
#22 0x0100580e in recursive_edit_1 ()
No symbol table info available.
#23 0x01005972 in Frecursive_edit ()
No symbol table info available.
#24 0x010027c6 in main ()
No symbol table info available.
(gdb) xbacktrace
(gdb)

Message #11 received at 6540 <at> debbugs.gnu.org (full text, mbox):

From: Lars Magne Ingebrigtsen <larsi <at> gnus.org>
To: oCameLo <camel322 <at> gmail.com>
Cc: 6540 <at> debbugs.gnu.org
Subject: Re: 23.2; 23.2.1 (i386-mingw-nt6.1.7600) crashes too
Date: Wed, 21 Sep 2011 23:14:39 +0200

oCameLo <camel322 <at> gmail.com> writes:

> Steps to reproduce:
>
>  - emacs -q
>
>  - (setq cache-long-line-scans t)
>    C-x C-e
>
>  - (insert (prin1-to-string (x-list-fonts "*")))
>    C-j

I'm unable to reproduce this with Emacs 24 under Linux.  Has this bug
gone away in Emacs 24 for you, too?

-- 
(domestic pets only, the antidote for overdose, milk.)
  bloggy blog http://lars.ingebrigtsen.no/

Message #14 received at 6540 <at> debbugs.gnu.org (full text, mbox):

From: Lars Magne Ingebrigtsen <larsi <at> gnus.org>
To: oCameLo <camel322 <at> gmail.com>
Cc: 6540 <at> debbugs.gnu.org
Subject: Re: bug#6540: 23.2; 23.2.1 (i386-mingw-nt6.1.7600) crashes too
Date: Sat, 07 Jan 2012 05:36:43 +0100

Lars Magne Ingebrigtsen <larsi <at> gnus.org> writes:

> oCameLo <camel322 <at> gmail.com> writes:
>
>> Steps to reproduce:
>>
>>  - emacs -q
>>
>>  - (setq cache-long-line-scans t)
>>    C-x C-e
>>
>>  - (insert (prin1-to-string (x-list-fonts "*")))
>>    C-j
>
> I'm unable to reproduce this with Emacs 24 under Linux.  Has this bug
> gone away in Emacs 24 for you, too?

More information was requested, but no response was given within a few
months, so I'm closing this bug report.  If the problem still exists,
please reopen this bug report.

-- 
(domestic pets only, the antidote for overdose, milk.)
  bloggy blog http://lars.ingebrigtsen.no/

Message #19 received at 6540 <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: Lars Magne Ingebrigtsen <larsi <at> gnus.org>
Cc: camel322 <at> gmail.com, 6540 <at> debbugs.gnu.org
Subject: Re: bug#6540: 23.2; 23.2.1 (i386-mingw-nt6.1.7600) crashes too
Date: Sat, 07 Jan 2012 10:24:10 +0200

> From: Lars Magne Ingebrigtsen <larsi <at> gnus.org>
> Date: Sat, 07 Jan 2012 05:36:43 +0100
> Cc: 6540 <at> debbugs.gnu.org
> 
> Lars Magne Ingebrigtsen <larsi <at> gnus.org> writes:
> 
> > oCameLo <camel322 <at> gmail.com> writes:
> >
> >> Steps to reproduce:
> >>
> >>  - emacs -q
> >>
> >>  - (setq cache-long-line-scans t)
> >>    C-x C-e
> >>
> >>  - (insert (prin1-to-string (x-list-fonts "*")))
> >>    C-j
> >
> > I'm unable to reproduce this with Emacs 24 under Linux.  Has this bug
> > gone away in Emacs 24 for you, too?
> 
> More information was requested, but no response was given within a few
> months, so I'm closing this bug report.  If the problem still exists,
> please reopen this bug report.

I will reopen it, because it can be easily reproduced with the current
trunk.  For the record, the backtrace is below.

  Breakpoint 1, w32_abort () at w32fns.c:7193
  7193      button = MessageBox (NULL,
  (gdb) bt
  #0  w32_abort () at w32fns.c:7193
  #1  0x012f7f19 in set_cache_region (c=0x357d1a0, start=269, end=110364,
      value=1) at region-cache.c:387
  #2  0x012f860b in know_region_cache (buf=0x32a6000, c=0x357d1a0, start=269,
      end=110364) at region-cache.c:694
  #3  0x010fbc5d in scan_buffer (target=10, start=110361, end=1, count=-1,
      shortage=0x0, allow_quit=0) at search.c:793
  #4  0x010fc0c4 in find_next_newline_no_quit (from=110361, cnt=-1)
      at search.c:935
  #5  0x01166d9d in back_to_previous_line_start (it=0x82dcb0) at xdisp.c:5711
  #6  0x0116726e in back_to_previous_visible_line_start (it=0x82dcb0)
      at xdisp.c:5855
  #7  0x0116fc5a in move_it_vertically_backward (it=0x82dcb0, dy=264)
      at xdisp.c:8744
  #8  0x011876b1 in redisplay_window (window=59080197, just_this_one_p=0)
      at xdisp.c:15649
  #9  0x0117fc3e in redisplay_window_0 (window=59080197) at xdisp.c:13603
  #10 0x01033d0b in internal_condition_case_1 (
      bfun=0x117fc0c <redisplay_window_0>, arg=59080197, handlers=53054174,
      hfun=0x117fbeb <redisplay_window_error>) at eval.c:1537
  #11 0x0117fbdb in redisplay_windows (window=59080197) at xdisp.c:13583
  #12 0x0117db7e in redisplay_internal () at xdisp.c:13160
  #13 0x0117ae70 in redisplay () at xdisp.c:12383
  #14 0x010087e2 in read_char (commandflag=1, nmaps=2, maps=0x82fa30,
      prev_event=53069850, used_mouse_menu=0x82fb5c, end_time=0x0)
      at keyboard.c:2444
  #15 0x0101c232 in read_key_sequence (keybuf=0x82fc60, bufsize=30,
      prompt=53069850, dont_downcase_last=0, can_return_switch_frame=1,
      fix_current_buffer=1) at keyboard.c:9300
  #16 0x01005aa8 in command_loop_1 () at keyboard.c:1448
  #17 0x01033bfb in internal_condition_case (bfun=0x10054b6 <command_loop_1>,
      handlers=53127578, hfun=0x1004ce0 <cmd_error>) at eval.c:1499
  #18 0x0100511c in command_loop_2 (ignore=53069850) at keyboard.c:1159
  #19 0x010335bb in internal_catch (tag=53125602,
      func=0x10050f9 <command_loop_2>, arg=53069850) at eval.c:1256
  #20 0x010050d4 in command_loop () at keyboard.c:1138
  #21 0x0100469e in recursive_edit_1 () at keyboard.c:758
  #22 0x010049c0 in Frecursive_edit () at keyboard.c:822
  #23 0x010027c8 in main (argc=2, argv=0xa32880) at emacs.c:1715
  (gdb) up
  #1  0x012f7f19 in set_cache_region (c=0x357d1a0, start=269, end=110364,
      value=1) at region-cache.c:387
  387         abort ();
  (gdb) l
  382     {
  383       if (start > end)
  384         abort ();
  385       if (start < c->buffer_beg
  386           || end   > c->buffer_end)
  387         abort ();
  388
  389       /* Eliminate this case; then we can assume that start and end-1 are
  390          both the locations of real characters in the buffer.  */
  391       if (start == end)
  (gdb) p c->buffer_beg
  $1 = 1
  (gdb) p c->buffer_end
  $2 = 110362

Message #26 received at 6540-done <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: larsi <at> gnus.org, camel322 <at> gmail.com, 6540-done <at> debbugs.gnu.org
Subject: Re: bug#6540: 23.2; 23.2.1 (i386-mingw-nt6.1.7600) crashes too
Date: Sat, 07 Jan 2012 14:09:24 +0200

> Date: Sat, 07 Jan 2012 10:24:10 +0200
> From: Eli Zaretskii <eliz <at> gnu.org>
> Cc: camel322 <at> gmail.com, 6540 <at> debbugs.gnu.org
> 
> > From: Lars Magne Ingebrigtsen <larsi <at> gnus.org>
> > Date: Sat, 07 Jan 2012 05:36:43 +0100
> > Cc: 6540 <at> debbugs.gnu.org
> > 
> > Lars Magne Ingebrigtsen <larsi <at> gnus.org> writes:
> > 
> > > oCameLo <camel322 <at> gmail.com> writes:
> > >
> > >> Steps to reproduce:
> > >>
> > >>  - emacs -q
> > >>
> > >>  - (setq cache-long-line-scans t)
> > >>    C-x C-e
> > >>
> > >>  - (insert (prin1-to-string (x-list-fonts "*")))
> > >>    C-j
> > >
> > > I'm unable to reproduce this with Emacs 24 under Linux.  Has this bug
> > > gone away in Emacs 24 for you, too?

I guess this couldn't be reproduced on GNU/Linux because all font
names there are pure ASCII.  On Windows, x-list-fonts includes several
non-ASCII characters, in font names such as this:

 "-outline-Counterfeit² B-normal-normal-normal-*-*-*-*-*-p-*-iso10646-1"

There are, indeed, such fonts on MS-Windows.

This bug is triggered only when non-ASCII text is inserted into a
buffer, because it used byte positions where character positions were
expected.

(Actually, I wonder how come we didn't see this until now, the bug
being so glaring; I guess the number of people using
cache-long-line-scans is nil.)

>   Breakpoint 1, w32_abort () at w32fns.c:7193
>   7193      button = MessageBox (NULL,
>   (gdb) bt
>   #0  w32_abort () at w32fns.c:7193
>   #1  0x012f7f19 in set_cache_region (c=0x357d1a0, start=269, end=110364,
>       value=1) at region-cache.c:387
>   #2  0x012f860b in know_region_cache (buf=0x32a6000, c=0x357d1a0, start=269,
>       end=110364) at region-cache.c:694
>   #3  0x010fbc5d in scan_buffer (target=10, start=110361, end=1, count=-1,
>       shortage=0x0, allow_quit=0) at search.c:793

Here, a buffer of 110361 characters was scanned back for a new line,
but know_region_cache is passed 110364 as the buffer end, which is the
value of ZV_BYTE, not of ZV.

Fixed in revision 106820 on the trunk.

I'm closing this bug report (again ;-).

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