toggle-truncated-lines does not work after split-window-horizontally

[Marco.MAGGESI]

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In GNU Emacs 21.2.1 (i686-pc-linux-gnu, X toolkit, Xaw3d scroll bars)
 of 2002-05-02 on math4.unice.fr
configured using `configure  --prefix=/home/net/admin/coq'
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: nil
  locale-coding-system: nil
  default-enable-multibyte-characters: t

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

toggle-truncated-lines does not change the behaviour
when the frame is split horizontally.

Recent input:
<right> <right> <right> <right> <right> <right> <right> 
<right> <right> <right> <right> <right> <right> <right> 
<right> <right> <right> <right> <right> <right> <right> 
<right> <right> <right> <right> <right> <right> <right> 
<right> <right> <right> <right> <right> <right> <right> 
<right> <right> <right> <right> <right> <right> <right> 
<right> <right> <right> <right> <right> <right> <right> 
C-/ C-/ C-/ C-/ C-/ C-/ C-/ C-/ C-/ C-/ C-/ C-/ C-/ 
<up> C-a C-k C-k C-x k <return> y e s <return> M-x 
<up> C-g C-x 1 C-x 2 3 C-/ C-x 1 C-x 3 M-x <up> <return> 
M-x C-g <help-echo> <help-echo> <help-echo> <help-echo> 
<help-echo> <help-echo> <menu-bar> <help-menu> <re
port-emacs-bug>

Recent messages:
Long Line Truncation enabled
Long Line Truncation disabled
Type M-x switch-to-buffer-other-window RET to restore the other window.  C-M-v 
to scroll the help.
Mark set [2 times]
Loading dabbrev...done
Mark set [2 times]
Undo! [13 times]
call-interactively: Quit
Undo!
Long Line Truncation enabled
call-interactively: QuitGcc: nnfolder+archive:misc-mail
From: maggesi@math4.unice.fr (Marco.MAGGESI)
Date: 12 Jun 2002 11:46:20 -0200
Message-ID: <i74n0u0pq37.fsf@math4.unice.fr>
Lines: 9
User-Agent: Gnus/5.09 (Gnus v5.9.0) Emacs/21.2
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii


-- 
Marco Maggesi                        Bureau: W604
tel:     04.92.07.62.60              fax.: +33 (0)4.93.51.79.74
email:   maggesi@math.unice.fr
adresse: Laboratoire J.A.Dieudonne   UMR CNRS 6621
         Universite de Nice Sophia-Antipolis
         Parc Valrose
         06108 Nice Cedex 2