Fatal error with changed buffer-display-table

["Mateusz Greszta" <mg197860@students.mimuw.edu.pl>]

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In GNU Emacs 21.1.1 (i386-pld-linux-gnu, X toolkit, Xaw3d scroll bars)
 of 2001-10-24 on rainbow
configured using `configure  --prefix=/usr/local --exec-prefix=/usr/local --bindir=/usr/local/bin --sbindir=/usr/local/sbin --sysconfdir=/etc --datadir=/usr/local/share --includedir=/usr/local/include --libdir=/usr/local/lib --localstatedir=/var --mandir=/usr/local/share/man --infodir=/usr/local/share/info --libexecdir=/usr/local/lib --sharedstatedir=/var --with-gcc --with-pop --with-x-toolkit --with-xpm --with-jpeg --with-tiff --with-gif --with-png i386-pld-linux'
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: pl_PL
  locale-coding-system: iso-latin-2
  default-enable-multibyte-characters: t

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


I've changed buffer-display-table with command:

(set 'buffer-display-table
     (let ((table (make-display-table)))
       (aset table ?x (string-to-vector "1234"))
       table))

then, at end of buffer (!), I input x <return> y and finally <up>

I got "Fatal error (6).Aborted"

-- 
Mateusz Greszta <mg197860@zodiac.mimuw.edu.pl>


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