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bug#9607: incorrect behavior with "automatic-hscroll-mode nil" in ncurse

From: David Lawless
Subject: bug#9607: incorrect behavior with "automatic-hscroll-mode nil" in ncurses/vt220 text operation; wrong in 23 but ok in 22.1
Date: Mon, 26 Sep 2011 17:19:05 -0400

have "(setq automatic-hscroll-mode nil)" in .emacs file

edit wide output of file copied from /proc/interrupts
(machine has 12 cores)

place cursor at around column 12, then scroll out
to left view with "scroll-left" so ends-of-lines
appear in middle of windows, then from mapped
key issue "next-line" twice

first time it behaves correctly, second time
display scrolls horizontally so cursor is visible,
which it should not do

was upgrading from 20.5a to 23.3a when noticed
this; went back to 22.1 and it works ok

In GNU Emacs 22.1.1 (x86_64-unknown-linux-gnu)
 of 2011-09-26 on siobhan
configured using `configure  '--without-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: C
  locale-coding-system: nil
  default-enable-multibyte-characters: t

Major mode: Lisp Interaction

Minor modes in effect:
  file-name-shadow-mode: t
  unify-8859-on-encoding-mode: t
  utf-translate-cjk-mode: t
  auto-compression-mode: t
  line-number-mode: t

Recent input:
ESC x TAB C-g ESC x r e p TAB o TAB DEL o t TAB DEL 
r TAB C-j

Recent messages:
Loading hi-lock...done
Loading cc-mode...done
Loading make-mode...done
Making completion list...
Loading help-mode...done
Quit [2 times]
Making completion list... [2 times]
Loading emacsbug...done

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