GNU bug report logs - #1851
23.0.60; eval-buffer on a file containing help-xref-button doesn't update help mode text

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Message #5 received at submit <at> emacsbugs.donarmstrong.com (full text, mbox):

From: Brent Goodrick <bgoodr <at> gmail.com>
To: emacs-pretest-bug <at> gnu.org
Subject: 23.0.60; eval-buffer on a file containing help-xref-button doesn't update help mode text
Date: Sat, 10 Jan 2009 12:41:38 -0800

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 emacs-pretest-bug <at> gnu.org mailing list.

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

Do the following to reproduce:

1. Invoke emacs with -q.

2. C-h f help-xref-button 

3. Verify that you see a help mode buffer with this text:

> help-xref-button is a Lisp function in `help-mode.el'.
> 
> (help-xref-button match-number type &rest args)
> 
> Make a hyperlink for cross-reference text previously matched.
> match-number is the subexpression of interest in the last matched
> regexp.  type is the type of button to use.  Any remaining arguments are
> passed to the button's help-function when it is invoked.
> See `help-make-xrefs'.
> 
> [back]

4. Hit the TAB key in that buffer to position over help-mode.el

5. Hit the return key. At this point, you should be in the file
.../share/emacs/23.0.60/lisp/help-mode.el.gz or some similarly named
.el.gz file.

6. Copy the full defun body of the help-xref-button function and paste
it into a new file, say, in /tmp/newfile.el

7. When in the buffer for newfile.el, type M-x eval-buffer

8. Redo step 2 and 3, but notice that the Lisp function in
`help-mode.el' still remains just that. It should instead read
`newfile.el'. Clicking on the link for `help-mode.el' brings me back
to the original definition, not the one I have redefined in newfile.el


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/brentg/emacs_from_source/install/share/emacs/23.0.60/etc/DEBUG for instructions.


In GNU Emacs 23.0.60.1 (x86_64-unknown-linux-gnu, GTK+ Version 2.12.11)
 of 2009-01-10 on hungover
Windowing system distributor `The X.Org Foundation', version 11.0.10402000
configured using `configure  '--with-x-toolkit' '--with-xft' '--prefix=/home/brentg/emacs_from_source/install''

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

Major mode: Emacs-Lisp

Minor modes in effect:
  diff-auto-refine-mode: t
  erc-list-mode: t
  erc-menu-mode: t
  erc-pcomplete-mode: t
  erc-track-mode: t
  erc-track-minor-mode: t
  erc-match-mode: t
  erc-button-mode: t
  erc-netsplit-mode: t
  desktop-save-mode: t
  iswitchb-mode: t
  erc-ring-mode: t
  erc-services-mode: t
  erc-networks-mode: t
  erc-fill-mode: t
  erc-stamp-mode: t
  erc-irccontrols-mode: t
  erc-noncommands-mode: t
  erc-move-to-prompt-mode: t
  erc-readonly-mode: t
  display-time-mode: t
  shell-dirtrack-mode: t
  delete-selection-mode: t
  mouse-wheel-mode: t
  menu-bar-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  blink-cursor-mode: t
  global-auto-composition-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  line-number-mode: 1
  transient-mark-mode: t

Recent input:
C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n 
C-p C-p C-p C-p C-p C-p C-l C-p C-p C-p C-p C-n C-n 
C-n C-n C-n C-n C-n C-n C-p C-p C-p C-p C-p C-p C-p 
C-p C-M-SPC M-; 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-p C-p 
C-p C-p C-l C-p C-p C-f C-e M-b C-M-SPC C-z C-n C-n 
C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n 
C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n 
C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n 
C-n C-p C-p C-p C-p C-p C-p C-p C-p C-n C-n C-e <return> 
M-( s e t q SPC m y - b a c k SPC C-v <tab> M-b C-M-SPC 
M-( C-a C-x C-s C-c d <help-echo> <help-echo> <down-mouse-1> 
<mouse-1> M-O M-P M-O C-g C-f M-P M-b M-b M-b M-b M-b 
C-k <return> <help-echo> <help-echo> <down-mouse-1> 
<mouse-1> C-p C-p C-p C-e M-b M-b <C-return> C-M-a 
<down-mouse-1> <mouse-1> <down-mouse-4> <mouse-4> <double-down-mouse-4> 
<double-mouse-4> <triple-down-mouse-4> <triple-mouse-4> 
<triple-down-mouse-4> <triple-mouse-4> <triple-down-mouse-4> 
<triple-mouse-4> <triple-down-mouse-4> <triple-mouse-4> 
<triple-down-mouse-4> <triple-mouse-4> <triple-down-mouse-4> 
<triple-mouse-4> <triple-down-mouse-4> <triple-mouse-4> 
<triple-down-mouse-4> <triple-mouse-4> <triple-down-mouse-4> 
<triple-mouse-4> C-M-SPC M-; C-x C-s <down-mouse-1> 
<mouse-1> C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n 
C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-n C-p 
C-p C-p C-p C-p C-p C-p C-a C-n C-n C-p C-M-SPC M-; 
C-x C-s <down-mouse-1> <mouse-1> C-a C-n C-n C-n C-n 
C-M-SPC M-; C-x C-s <help-echo> <down-mouse-1> <mouse-1> 
M-P <return> <down-mouse-1> <mouse-1> C-p C-p C-p C-p 
C-p C-p C-p C-p M-x r e p o r <backspace> r t - b u 
g <tab> <backspace> <backspace> <backspace> <backspace> 
e m <tab> b u <tab> <return>

Recent messages:
Pushed a window configuration.
Mark set
line-move-visual: Beginning of buffer [4 times]
Mark set
Wrote /home/brentg/tmp/help-scrap.el
Mark set
Wrote /home/brentg/tmp/help-scrap.el
Mark set
Wrote /home/brentg/tmp/help-scrap.el
History item: 1

Message #8 received at 1851 <at> emacsbugs.donarmstrong.com (full text, mbox):

From: Glenn Morris <rgm <at> gnu.org>
To: Brent Goodrick <bgoodr <at> gmail.com>
Cc: 1851 <at> debbugs.gnu.org
Subject: Re: bug#1851: 23.0.60; eval-buffer on a file containing help-xref-button doesn't update help mode text
Date: Sat, 10 Jan 2009 16:06:57 -0500

Brent Goodrick wrote:

> 8. Redo step 2 and 3, but notice that the Lisp function in
> `help-mode.el' still remains just that. It should instead read
> `newfile.el'. Clicking on the link for `help-mode.el' brings me back
> to the original definition, not the one I have redefined in newfile.el

I can't reproduce this with emacs -Q. (I assume you saved newfile.el,
it wasn't explicit.)

Message #13 received at 1851-done <at> emacsbugs.donarmstrong.com (full text, mbox):

From: Brent Goodrick <bgoodr <at> gmail.com>
To: Glenn Morris <rgm <at> gnu.org>
Subject: Re: bug#1851: 23.0.60; eval-buffer on a file containing help-xref-button doesn't update help mode text
Date: Sat, 10 Jan 2009 22:05:40 -0800

Glenn Morris writes:
 > Brent Goodrick wrote:
 > 
 > > 8. Redo step 2 and 3, but notice that the Lisp function in
 > > `help-mode.el' still remains just that. It should instead read
 > > `newfile.el'. Clicking on the link for `help-mode.el' brings me back
 > > to the original definition, not the one I have redefined in newfile.el
 > 
 > I can't reproduce this with emacs -Q. (I assume you saved newfile.el,
 > it wasn't explicit.)

Sigh. Now I can't either.  And I believe I had saved the file.  I had
tried this a number of ways, too. Hmmm, I guess just close/ignore this
for now. Thanks for trying to reproduce it.

Brent

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