GNU bug report logs - #16711
24.3.50; Error: pre-redisplay-function

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Package: emacs; Reported by: "T.V Raman" <tv.raman.tv@HIDDEN>; Keywords: unreproducible; dated Mon, 10 Feb 2014 16:39:01 UTC; Maintainer for emacs is bug-gnu-emacs@HIDDEN.
Removed tag(s) moreinfo. Request was from Lars Ingebrigtsen <larsi@HIDDEN> to control <at> debbugs.gnu.org. Full text available.

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Subject: Re: bug#16711: 24.3.50; Error: pre-redisplay-function
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Possible -- though I am not sure. Note -- at the time I reported
this, eww wasn't the only  thing that caused it -- it just
tickled it a lot more. 
>>>>> "Lars" == Lars Ingebrigtsen <larsi@HIDDEN> writes:
    Lars> "T. V. Raman" <tv.raman.tv@HIDDEN> writes:
    >> Lars, Starting from emacs -q is well-nigh impossible for
    >> me -- as the Emacspeak Press Release says --"Once
    >> Emacspeak is uninstalled, the user stops functioning
    >> altogether"
    Lars> 
    Lars> Yeah, I can see how that would be a problem. :-)
    Lars> 
    Lars> eww does some funky stuff in `after-change-functions'
    Lars> -- could that be interfering with something in
    Lars> Emacspeak, perhaps?
    Lars> 
    Lars> -- (domestic pets only, the antidote for overdose,
    Lars> milk.) bloggy blog: http://lars.ingebrigtsen.no




Information forwarded to bug-gnu-emacs@HIDDEN:
bug#16711; Package emacs. Full text available.

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From: Lars Ingebrigtsen <larsi@HIDDEN>
To: "T. V. Raman" <tv.raman.tv@HIDDEN>
Subject: Re: bug#16711: 24.3.50; Error: pre-redisplay-function
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"T. V. Raman" <tv.raman.tv@HIDDEN> writes:

> Lars, Starting from emacs -q is well-nigh impossible  for me --
> as the Emacspeak Press Release says --"Once Emacspeak is
> uninstalled, the user  stops functioning altogether"

Yeah, I can see how that would be a problem.  :-)

eww does some funky stuff in `after-change-functions' -- could that be
interfering with something in Emacspeak, perhaps?

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




Information forwarded to bug-gnu-emacs@HIDDEN:
bug#16711; Package emacs. Full text available.

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From: Stefan Monnier <monnier@HIDDEN>
To: "T.V Raman" <tv.raman.tv@HIDDEN>
Subject: Re: bug#16711: 24.3.50; Error: pre-redisplay-function
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> I've been bitten by this intermitently for the last few weeks; it
> appears to be happening more often now.
> Observed initially in W3 when rendering heavy-weight web pages; it also
> shows up in eww.

That's a problem that needs fixing.

> You get a variable depth exeeds max eval depth error repeatedly --
> turning on debug doesn't yield any additional info.

That's not very surprising: since pre-redisplay-function is run during
redisplay, running redisplay (e.g. to show a backtrace) from within it
would require extra care to try and avoid inf-looping.

Maybe we should re-introduce stack-trace-on-error, or something
equivalent, for those cases.

In the mean time, can you run Emacs within GDB and set a breakpoint on
maybe_call_debugger?


        Stefan




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Subject: Re: bug#16711: 24.3.50; Error: pre-redisplay-function
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Lars, Starting from emacs -q is well-nigh impossible  for me --
as the Emacspeak Press Release says --"Once Emacspeak is
uninstalled, the user  stops functioning altogether"
>>>>> "Lars" == Lars Ingebrigtsen <larsi@HIDDEN> writes:
    Lars> "T. V. Raman" <tv.raman.tv@HIDDEN> writes:
    >> 1. This may not have been eww specific though eww
    >> triggered it regularly. My work-around was to set that var
    >> to nil -- and it's not bitten since.
    Lars> 
    Lars> Can you give a recipe for reproducing the bug starting
    Lars> from "emacs -Q"?
    Lars> 
    Lars> -- (domestic pets only, the antidote for overdose,
    Lars> milk.) bloggy blog: http://lars.ingebrigtsen.no




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From: Lars Ingebrigtsen <larsi@HIDDEN>
To: "T. V. Raman" <tv.raman.tv@HIDDEN>
Subject: Re: bug#16711: 24.3.50; Error: pre-redisplay-function
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"T. V. Raman" <tv.raman.tv@HIDDEN> writes:

> 1. This may not have been eww specific though eww triggered it
> regularly.
> My work-around was to set that var to nil -- and it's not bitten since.

Can you give a recipe for reproducing the bug starting from "emacs -Q"?

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




Information forwarded to bug-gnu-emacs@HIDDEN:
bug#16711; Package emacs. Full text available.

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Subject: Re: bug#16711: 24.3.50; Error: pre-redisplay-function
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1. This may not have been eww specific though eww triggered it
regularly.
My work-around was to set that var to nil -- and it's not bitten since.
>>>>> "Lars" == Lars Ingebrigtsen <larsi@HIDDEN> writes:
    Lars> "T. V. Raman" <tv.raman.tv@HIDDEN> writes:
    >> loading something like cnn.com in eww appears to trigger
    >> it. But the problem is that it doesn't *always* trigger it
    Lars> 
    Lars> Are you still seeing this problem? I'm unable to
    Lars> reproduce it.
    Lars> 
    Lars> -- (domestic pets only, the antidote for overdose,
    Lars> milk.) bloggy blog: http://lars.ingebrigtsen.no




Information forwarded to bug-gnu-emacs@HIDDEN:
bug#16711; Package emacs. Full text available.
Added tag(s) unreproducible. Request was from Lars Ingebrigtsen <larsi@HIDDEN> to control <at> debbugs.gnu.org. Full text available.

Message received at 16711 <at> debbugs.gnu.org:


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"T. V. Raman" <tv.raman.tv@HIDDEN> writes:

> loading something like cnn.com in eww appears to trigger it. But
> the problem is that it doesn't *always* trigger it 

Are you still seeing this problem?  I'm unable to reproduce it.

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




Information forwarded to bug-gnu-emacs@HIDDEN:
bug#16711; Package emacs. Full text available.

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loading something like cnn.com in eww appears to trigger it. But
the problem is that it doesn't *always* trigger it 
>>>>> "Stefan" == Stefan Monnier <monnier@HIDDEN> writes:
    >> I've been bitten by this intermitently for the last few
    >> weeks; it appears to be happening more often now. Observed
    >> initially in W3 when rendering heavy-weight web pages; it
    >> also shows up in eww. You get a variable depth exeeds max
    >> eval depth error repeatedly --
    Stefan> 
    Stefan> Hmm.. can you come up with a recipe to reproduce it?
    Stefan> 
    >> turning on debug doesn't yield any additional info.
    Stefan> 
    Stefan> Indeed, pre-redisplay-function is run at a time where
    Stefan> we can't conveniently redisplay, I think, so we can't
    Stefan> drop into the debugger.
    Stefan> 
    >> The fix appears to be to set pre-redisplay-function to nil
    Stefan> 
    Stefan> That's obviously just a workaround.
    Stefan> 
    >> --- looking at the code, I've not figured out what that
    >> variable does
    Stefan> 
    Stefan> The variable doesn't do anything, it's just a
    Stefan> hook. Its default value is used to implement the
    Stefan> highlighting of the active region.
    Stefan> 
    Stefan> 
    Stefan>         Stefan




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From: Stefan Monnier <monnier@HIDDEN>
To: "T.V Raman" <tv.raman.tv@HIDDEN>
Subject: Re: bug#16711: 24.3.50; Error: pre-redisplay-function
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> I've been bitten by this intermitently for the last few weeks; it
> appears to be happening more often now.
> Observed initially in W3 when rendering heavy-weight web pages; it also
> shows up in eww.
> You get a variable depth exeeds max eval depth error repeatedly --

Hmm.. can you come up with a recipe to reproduce it?

> turning on debug doesn't yield any additional info.

Indeed, pre-redisplay-function is run at a time where we can't
conveniently redisplay, I think, so we can't drop into the debugger.

> The fix appears to be to set pre-redisplay-function to nil

That's obviously just a workaround.

> --- looking at the code, I've not figured out what that variable does

The variable doesn't do anything, it's just a hook.
Its default value is used to implement the highlighting of the active region.


        Stefan




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From: "T.V Raman" <tv.raman.tv@HIDDEN>
To: bug-gnu-emacs@HIDDEN
Subject: 24.3.50; Error: pre-redisplay-function
Date: Mon, 10 Feb 2014 08:37:47 -0800
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I've been bitten by this intermitently for the last few weeks; it
appears to be happening more often now.

Observed initially in W3 when rendering heavy-weight web pages; it also
shows up in eww.

You get a variable depth exeeds max eval depth error repeatedly --
turning on debug doesn't yield any additional info.


The fix appears to be to set pre-redisplay-function to nil --- looking
at the code, I've not figured out what that variable does 



In GNU Emacs 24.3.50.2 (x86_64-unknown-linux-gnu, GTK+ Version 2.24.10)
 of 2014-02-08 on lapdog
System Description:	Ubuntu 12.04.1 LTS

Configured using:
 `configure --prefix=/usr/local --without-compress-install'

Important settings:
  value of $LANG: en_US.UTF-8
  locale-coding-system: utf-8-unix

Major mode: Summary

Minor modes in effect:
  recentf-mode: t
  gpm-mouse-mode: t
  semantic-mode: t
  ido-everywhere: t
  display-time-mode: t
  jabber-activity-mode: t
  jabber-mode-line-mode: t
  erc-list-mode: t
  erc-menu-mode: t
  erc-autojoin-mode: t
  erc-ring-mode: t
  erc-networks-mode: t
  erc-pcomplete-mode: t
  erc-track-mode: t
  erc-match-mode: t
  erc-button-mode: t
  erc-fill-mode: t
  erc-stamp-mode: t
  erc-netsplit-mode: t
  erc-irccontrols-mode: t
  erc-noncommands-mode: t
  erc-move-to-prompt-mode: t
  erc-readonly-mode: t
  dynamic-completion-mode: t
  shell-dirtrack-mode: t
  global-voice-lock-mode: t
  voice-lock-mode: t
  tooltip-mode: t
  mouse-wheel-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
  buffer-read-only: t
  transient-mark-mode: t

Recent input:
RET y 4 g RET y n C-e s C-e a C-e m ESC [ [ D 4 g C-e 
m ESC m ESC < ESC [ C ESC [ C <down-mouse-1> <mouse-1> 
C-n ESC < C-n ESC x r e o ESC DEL r e p o r TAB b TAB 
RET

Recent messages:
nnimap read 11k from imap.gmail.com
nnimap read 29k from imap.gmail.com
nnimap read 61k from imap.gmail.com
nnimap read 87k from imap.gmail.com
nnimap read 94k from imap.gmail.com
nnimap read 112k from imap.gmail.com
Reading active file via nndraft...done
Gnus is ready 
Auto-saving...
End of buffer  [2 times]

Load-path shadows:
/home/raman/emacs/lisp/site-lisp/gm/g-utils hides /home/raman/emacs/lisp/emacspeak/lisp/g-client/g-utils
/home/raman/emacs/lisp/site-lisp/vm/lisp/tapestry hides /home/raman/emacs/lisp/emacspeak/lisp/tapestry
/home/raman/emacs/lisp/emacspeak/lisp/tetris hides /usr/local/share/emacs/24.3.50/lisp/play/tetris
/home/raman/.emacs.d/elpa/js2-mode-20131119.116/.dir-locals hides /usr/local/share/emacs/24.3.50/lisp/gnus/.dir-locals

Features:
(shadow emacsbug gnus-cite gnus-async gnus-bcklg gnus-ml nndraft nnmh
gnus-agent gnus-srvr gnus-score score-mode nnvirtual gnus-msg nnfolder
utf-7 gnus-cache epa-file network-stream recentf tree-widget
emacspeak-wizards emacspeak-eterm term ehelp emacspeak-texinfo texinfo
emacspeak-table-ui emacspeak-table emacspeak-find-dired find-dired eldoc
lisp-mnt t-mouse cal-china lunar cal-bahai cal-islam cal-hebrew holidays
hol-loaddefs gcal g-app g-auth mule-util cal-move server bbdb-vm
vm-virtual vm-summary-faces vm-pop vm-imap vm-thread vm-mime vm-mouse
vm-toolbar vm-menu vm-window vm-folder vm-crypto vm-misc vm-summary
vm-motion emacspeak-vm vm vm-autoload bbdb-snarf mail-extr bbdb-com
emacspeak-bbdb bbdb emms-volume emms-volume-amixer emms-lastfm emms-url
emms-browser sort emms-playlist-sort edmacro emacspeak-kmacro kmacro
emms-score emms-player-xine emms-player-mpd tq emms-playing-time
emms-lyrics emms-streams emms-mode-line emms-cache emms-info-ogginfo
emms-info-mp3info emms-info later-do emms-playlist-mode
emms-player-mplayer emms-player-simple emms-source-playlist
emms-source-file emms-setup emacspeak-emms emms emms-compat
emacspeak-reftex reftex reftex-vars emacspeak-info info emacspeak-auctex
tex-site emacs-droid-autoloads emacs-droid gopher-autoloads finder-inf
memory-usage-autoloads python-mode-autoloads slime-repl-autoloads
slime-autoloads package emacs-startup emacspeak-cedet
semantic/util-modes semantic/util semantic semantic/tag semantic/lex
semantic/fw mode-local cedet emacspeak-ido ido time emacspeak-gm gm ffap
tramp tramp-compat tramp-loaddefs trampver emacspeak-twittering
twittering-mode epa epg ssl emacspeak-jabber jabber jabber-libnotify
jabber-awesome jabber-osd jabber-wmii jabber-xmessage jabber-festival
jabber-sawfish jabber-ratpoison jabber-tmux jabber-screen jabber-socks5
jabber-ft-server jabber-si-server jabber-ft-client jabber-ft-common
jabber-si-client jabber-si-common jabber-feature-neg jabber-truncate
jabber-time jabber-autoaway jabber-vcard-avatars jabber-chatstates
jabber-events jabber-vcard jabber-avatar jabber-activity jabber-watch
jabber-modeline jabber-ahc-presence jabber-ahc jabber-version
jabber-ourversion jabber-muc-nick-completion hippie-exp jabber-browse
jabber-search jabber-register jabber-roster jabber-private
jabber-presence jabber-muc jabber-muc-nick-coloring assoc hexrgb
jabber-newdisco jabber-widget jabber-disco jabber-chat jabber-history
jabber-chatbuffer jabber-alert jabber-iq jabber-core jabber-console
emacspeak-sgml-mode sgml-mode ewoc jabber-keymap jabber-sasl sasl
sasl-anonymous sasl-login sasl-plain fsm jabber-logon jabber-conn srv
dns starttls gnutls jabber-xml jabber-menu jabber-autoloads jabber-util
erc-list erc-menu erc-join erc-ring erc-networks erc-pcomplete erc-track
erc-match erc-button erc-fill erc-stamp erc-netsplit emacspeak-erc
erc-goodies erc erc-backend erc-compat pp emacspeak-org org org-macro
org-footnote org-pcomplete org-list org-faces org-entities
emacspeak-outline foldout noutline outline easy-mmode org-version
ob-emacs-lisp ob ob-tangle org-src ob-ref ob-lob ob-table ob-keys ob-exp
ob-comint ob-core ob-eval org-compat org-macs org-loaddefs
emacspeak-find-func find-func emacspeak-calendar appt diary-lib
diary-loaddefs solar cal-dst cal-menu calendar cal-loaddefs
emacspeak-tcl tcl emacspeak-folding folding emacspeak-w3m w3m-form
emacspeak-m-player w3m doc-view jka-compr image-mode timezone w3m-hist
w3m-fb bookmark-w3m w3m-ems w3m-ccl ccl w3m-favicon w3m-image w3m-proc
w3m-util w3-prepare w3 w3-menu w3-emulate w3-auto w3-parse w3-fast-parse
emacspeak-w3 emacspeak-google html2text gmaps emacspeak-we
emacspeak-xslt w3-display w3-mouse w3-imap url-handlers w3-widget
w3-vars w3-keymap w3-cus css font disp-table devices ange-ftp w3-cfg
w3-compat emacspeak-sigbegone sigbegone emacspeak-custom cus-edit
cus-start smtpmail sendmail gnus-prepare gnus-demon nntp nnimap
parse-time tls utf7 netrc emacspeak-gnus gm-nnir nnir gnus-art mm-uu
mml2015 epg-config mm-view mml-smime smime dig gnus-sum nnoo gnus-group
gnus-undo nnmail mail-source gnus-start gnus-spec gnus-int gnus-range
emacspeak-message message format-spec rfc822 mml mml-sec mm-decode
mm-bodies mm-encode mail-parse rfc2231 rfc2047 rfc2045 ietf-drums
mailabbrev gmm-utils mailheader gnus-win gnus gnus-ems nnheader
mail-utils emacspeak-mspools mspools vm-autoloads vm-version vm-vars
my-functions completion dired-aux dired-x emacspeak-dired
emacspeak-desktop desktop frameset dired emacspeak-aumix emacspeak-forms
forms-mode forms emacspeak-setup emacspeak-dbus nm dbus xml
emacspeak-webspace emacspeak-webutils browse-url url url-proxy
url-privacy url-expand url-methods url-history url-cookie url-domsuf
url-util url-parse auth-source eieio eieio-core gnus-util mm-util
mail-prsvr password-cache url-vars mailcap gweb gfeeds g-utils json
emacspeak-alsaplayer emacspeak-amark derived emacspeak-advice shell
pcomplete comint ring emacspeak-ansi-color ansi-color emacspeak-replace
emacspeak-redefine emacspeak-personality emacspeak emacspeak-widget
warnings wid-edit emacspeak-facemenu emacspeak-fix-interactive
emacspeak-buff-menu g-cus-load cus-load emacspeak-preamble
emacspeak-keymap emacspeak-speak time-date emacspeak-pronounce thingatpt
dtk-speak flite-voices dtk-interp voice-setup emacspeak-sounds
dectalk-voices espeak-voices mac-voices multispeech-voices
outloud-voices dtk-unicode byte-opt bytecomp byte-compile cconv
descr-text help-mode easymenu dtk-css-speech acss-structure
emacspeak-load-path advice help-fns vc-git vc-dispatcher vc-svn cl-macs
gv cl cl-loaddefs cl-lib tooltip electric uniquify ediff-hook vc-hooks
lisp-float-type mwheel x-win x-dnd tool-bar dnd fontset image regexp-opt
fringe tabulated-list newcomment lisp-mode prog-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 nadvice
loaddefs button faces cus-face macroexp files text-properties overlay
sha1 md5 base64 format env code-pages mule custom widget
hashtable-print-readable backquote make-network-process dbusbind
gfilenotify dynamic-setting system-font-setting font-render-setting
move-toolbar gtk x-toolkit x multi-tty emacs)

-- 




Acknowledgement sent to "T.V Raman" <tv.raman.tv@HIDDEN>:
New bug report received and forwarded. Copy sent to bug-gnu-emacs@HIDDEN. Full text available.
Report forwarded to bug-gnu-emacs@HIDDEN:
bug#16711; Package emacs. Full text available.
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