bug#970: 23.0.60; Non-ASCII display problems on a tty

[Eli Zaretskii]

 emacs -Q
 C-h H

 Type C-n several times, and you will see some very strange behavior:
 for example, some lines are skipped and point never enters them.

 Also, some non-ASCII characters are displayed incorrectly.  For
 example, the "Bengali" line has only 1 "?" character in the
 parentheses following the language name, whereas 2 characters are
 displayed on a graphics display (I tried MS-Windows).  On the same
 line, under "HELLO", there are 2 "?" characters instead of 4, and
 they are not aligned with the rest of greetings; moving point with
 C-f skips those "?"s and lands on what is displayed as space,
 but "C-x =" shows that there are non-ASCII characters in the buffer
 at those "blank" positions.

 Etc., etc., it looks like tty display of non-ASCII characters that
 cannot be displayed by the current terminal-coding-system is very
 much screwed up.

 Here's what "locale" reports, in case it's important:

   eliz@fencepost:~/emacs.cvs/emacs$ locale
   LANG=
   LC_CTYPE="POSIX"
   LC_NUMERIC="POSIX"
   LC_TIME="POSIX"
   LC_COLLATE="POSIX"
   LC_MONETARY="POSIX"
   LC_MESSAGES="POSIX"
   LC_PAPER="POSIX"
   LC_NAME="POSIX"
   LC_ADDRESS="POSIX"
   LC_TELEPHONE="POSIX"
   LC_MEASUREMENT="POSIX"
   LC_IDENTIFICATION="POSIX"
   LC_ALL=

In GNU Emacs 23.0.60.63 (x86_64-unknown-linux-gnu, X toolkit)
 of 2008-09-12 on fencepost
configured using `configure  '--with-jpeg=no' '--with-png=no' '--with-gif=no' 
'--with-tiff=no''

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
  value of $XMODIFIERS: nil
  locale-coding-system: nil
  default-enable-multibyte-characters: t

Major mode: Fundamental

Minor modes in effect:
  tooltip-mode: t
  menu-bar-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
  transient-mark-mode: t
  view-mode: t

Recent input:
ESC [ > 0 ; 1 3 6 ; 0 c C-h H ESC O B ESC O B ESC O 
B ESC O B ESC O B ESC O B ESC O B ESC O B C-n C-n C-n 
C-n C-n C-n ESC x r e p o r t - e m a TAB TAB RET

Recent messages:
("./src/emacs" "-Q")
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