bug#5639: 23.1.92; Undo doesn't work

bug#5639: 23.1.92; Undo doesn't work

[Torsten Bronger]

If I visit the *scratch* buffer, enter a character, and use C-x u, the
whole buffer ist emptied and the error message "Error: No further undo
information" appears.

Similarly, undoing undo doesn't work anymore by using undo, hitting
e.g. a cursor key and using undo again (for undoing the first undo).



In GNU Emacs 23.1.92.2 (x86_64-unknown-linux-gnu)
 of 2010-02-23 on wilson
Windowing system distributor `The X.Org Foundation', version 11.0.10604000
configured using `configure  '--prefix=/usr/local/' '--mandir=/usr/local/share/man/' '--infodir=/usr/local/share/info/' '--with-x-toolkit=no' '--with-xpm' '--with-jpeg' '--with-tiff' '--with-gif' '--with-png' '--with-x''

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.utf8
  value of $XMODIFIERS: nil
  locale-coding-system: utf-8-unix
  default enable-multibyte-characters: t

Major mode: Lisp Interaction

Minor modes in effect:
  global-auto-revert-mode: t
  savehist-mode: t
  display-time-mode: t
  desktop-save-mode: t
  mouse-wheel-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  line-number-mode: t

Recent input:
u n g e n SPC a n SPC d i e s e n SPC S t a p e l n 
SPC p a s s e n . M-q <left> <up> <left> <left> <left> 
<left> <left> <left> <left> <left> <left> <left> <left> 
<left> <left> M-- M-c M-q <down> <down> <down> <return> 
= = = = = = = = = = = = = = = = = = = = = = = = = = 
= = = = = = = = = = = = = = = = = = = = = = = = = = 
= = = = = = = = = = = = = = = = = = = = = = = = = = 
= = = = M-q C-x u <left> C-x u C-x u <up> <up> <up> 
<down> <down> <down> <down> C-x u C-x u <down> C-x 
u C-x k y e s <return> C-x C-f <return> g <up> <return> 
C-x k <down> <down> <up> <up> <return> C-c k C-x 1 
<next> C-x k M-< C-x u C-c g <return> c <return> <return> 
q q <down> <down> <down> <down> <down> <down> <down> 
<down> <down> <down> <down> <down> <down> <down> <down> 
<down> <down> <down> <down> <down> <down> <down> d 
d d d d C-x u C-x u C-x u <down> C-x u C-c g q C-c 
g L M-< C-s e m a c s C-s C-s C-s C-s C-s C-s C-s <left> 
<return> <return> M-> C-r u n d o <down> q C-x b * 
s c <tab> <return> f s d k j f d s j k f s d C-x u 
M-x r e p o r t - e m a <tab> b u <tab> <return>

Recent messages:
Mark set
Mark saved where search started
Retrieving newsgroup: gmane.emacs.pretest.bugs...
Fetching headers for gmane.emacs.pretest.bugs...done
Generating summary...done
No more unread articles
Mark set
Mark saved where search started
No more unread newsgroups
Error: No further undo information

Load-path shadows:
None found.

Features:
(shadow emacsbug hippie-exp multi-isearch pp apropos quail help-mode
view tabify bbdb-gui electric mailalias smtpmail pop3 ispell w3m-form
w3m-symbol gnus-picon sort gnus-cite smiley ansi-color flow-fill
gnus-agent gnus-srvr nnvirtual gnus-async gnus-bcklg gnus-score
score-mode gnus-ml gnus-msg gmane gnus-cache nnml nndraft nnmh bbdb-gnus
gnus-art mm-uu mml2015 epg-config mm-view smime dig gnus-sum bbdb-snarf
mail-extr bbdb-com warnings auth-source nntp nnoo rs-gnus-article-wash
gnus-topic gnus-group gnus-undo nnmail mail-source format-spec
gnus-start gnus-spec gnus-int gnus-range message byte-opt sendmail
ecomplete rfc822 mml mml-sec password-cache mm-decode mm-bodies
mm-encode mailcap mail-parse rfc2231 rfc2047 rfc2045 qp ietf-drums
mailabbrev gmm-utils mailheader canlock hashcash gnus-win gnus gnus-ems
nnheader gnus-util netrc time-date mail-utils mm-util mail-prsvr
scroll-lock todo-mode time-stamp notes-index-mode info parse-time vc-cvs
longlines vc-bzr sha1 hex-util disp-table python-21 python vc-rcs
reftex-vcr reftex-dcr reftex reftex-vars font-latex bytecomp
byte-compile latex tex-style tex noutline outline easy-mmode notes-mode
notes-aux server w3m browse-url doc-view jka-compr image-mode dired
w3m-hist w3m-fb w3m-ems wid-edit w3m-ccl ccl w3m-favicon w3m-image
w3m-proc w3m-util rst compile comint ring rs-windows-1252 edmacro kmacro
browse-kill-ring advice help-fns advice-preload mmm-mode mmm-univ
mmm-class mmm-region mmm-auto mmm-vars mmm-utils mmm-compat cl cl-19
bbdb-autoloads bbdb timezone notes-variables notes-emacs cal-china lunar
solar cal-dst cal-bahai cal-islam cal-hebrew holidays hol-loaddefs appt
diary-lib diary-loaddefs regexp-opt cal-menu easymenu calendar
cal-loaddefs w3-auto autorevert tex-site savehist time desktop delsel
cus-start cus-load 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
font-render-setting x multi-tty emacs)

-- 
Torsten Bronger, aquisgrana, europa vetus
                   Jabber ID: torsten.bronger@jabber.rwth-aachen.de
                                  or http://bronger-jmp.appspot.com

bug#5639: 23.1.92; Undo doesn't work

[Stefan Monnier]

> If I visit the *scratch* buffer, enter a character, and use C-x u, the
> whole buffer ist emptied and the error message "Error: No further undo
> information" appears.

I cannot reproduce it here:

   emacs -Q
   a
   C-x u

and the "a" is removed, but the rest of the text is left intact.
Most likely there's someting in your .emacs that triggers the problem.
Please try and figure out what it is so we can either fix it or discard
as a pilot error (or a bug in some other package).


        Stefan

bug#5639: 23.1.92; Undo doesn't work

[Glenn Morris]

Torsten Bronger wrote:

> If I visit the *scratch* buffer, enter a character, and use C-x u, the
> whole buffer ist emptied and the error message "Error: No further undo
> information" appears.

I cannot reproduce this, unless I press C-x u twice, in which case
emptying the whole buffer is the expected behaviour. (The insertion of
the initial scratch buffer text has been undoable in this way since
Emacs 22.1.)

> Similarly, undoing undo doesn't work anymore by using undo, hitting
> e.g. a cursor key and using undo again (for undoing the first undo).

I cannot reproduce this at all (with `emacs -Q').

> In GNU Emacs 23.1.92.2 (x86_64-unknown-linux-gnu)
>  of 2010-02-23 on wilson

bug#5639: 23.1.92; Undo doesn't work

[Glenn Morris]

This bug is being closed because it could not be reproduced and there
was no response to a request for more information.
If you reply with the requested information it can be reopened.

You can view the whole report at http://debbugs.gnu.org/BUGNUMBER