bug#664: 23.0.60; scroll bug

[Kenichi Handa <handa@m17n.org>]

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I received this bug report.

Start Emacs with -nw in a 80x24 terminal, visit the attached
file, then do this:

  C-u 1 C-v C-u 1 C-v

Now the top of the screen should be the third line starting
with "02 ...", but actually the continuation line of the
second line is shown.  And here after, C-u 1 C-v doesn't
scroll the screen anymore, and C-n doesn't move point to the
next line.

Both Emacs 22.2 and the CVS Emacs have this bug, but 22.1
doesn't.

---
Kenichi Handa
handa@ni.aist.go.jp


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#-*-coding:utf-8;-*-
01あああああああああああああああああああああああああああああああああああああああああ
02
03
04
05
06
07
08
09
10

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In GNU Emacs 23.0.60.6 (i686-pc-linux-gnu, GTK+ Version 2.12.10)
 of 2008-08-06 on etlken
configured using `configure  'CFLAGS=-g''

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: ja_JP.UTF-8
  value of $XMODIFIERS: @im=SCIM
  locale-coding-system: utf-8-unix
  default-enable-multibyte-characters: t

Major mode: Lisp Interaction

Minor modes in effect:
  display-time-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  global-auto-composition-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  line-number-mode: t

Recent input:
r e e n SPC m u s t SPC b e SPC t h e SPC s e c o n 
d SPC l i n e , SPC b u t SPC a c t u a l l y SPC E 
m a c s SPC s h o w s SPC t h e SPC c o n t i n u a 
t i o n SPC l i n e SPC o f SPC t h e SPC f i r s t 
SPC l i n e . SPC SPC A n d SPC h e r e SPC a f t e 
r , SPC C - u SPC 1 SPC C - v SPC d o e s n ' t SPC 
s c r e e n SPC ESC DEL s c r o l l SPC t h e SPC s 
c r e e n SPC a n y SPC m o DEL DEL DEL m o r e . C-a 
C-n C-n C-p C-o C-o C-n C-u 7 C-c C-w C-n C-n C-n C-n 
C-o C-c C-x TAB C-@ 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-a C-a C-v ESC v C-@ 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-n ESC w C-x L C-y C-x b RET C-x k RET 
ESC x l o a d SPC l i SPC RET r m a i k l DEL DEL l 
RET ESC x l o a d SPC l i SPC r DEL RET r m a i l - 
m i TAB RET C-x m C-x k RET ESC x r e p o r TAB RE
T

Recent messages:
Toggling menu-bar-mode off; better pass an explicit argument.
For information about GNU Emacs and the GNU system, type C-h C-a.
call-interactively: End of buffer
C-g runs the command keyboard-quit
Mark set [3 times]
Quit
Auto-saving...done
Mark set [4 times]
Loading rmail...done
Loading rmail-mime...done