Bug in column-number-mode

[Yong Lu]

In GNU Emacs 21.1.50.1 (i386-mingw-nt5.0.2195)
 of 2001-11-10 on ODYSSEY
configured using `configure --with-gcc (2.95)'
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: CHS
  locale-coding-system: chinese-iso-8bit
  default-enable-multibyte-characters: t

column-number-mode fails to report the right column of point when
point is moving past CJK charaters.

This bug can be observed by

        emacs -q
        C-h h
        M-x column-number-mode

move the cursor to any line with CJK characters, then move it past CJK
characters.

Yong