fringe-bitmap disappears

[SAITO Takuya]

When I evaluate these, top-right-angle bitmap is displayed in red.
(require 'fringe)
(setq indicate-buffer-boundaries 'right)
(defface fringe-test '((t (:inherit fringe :foreground "red"))) "test")
(set-fringe-bitmap-face 'top-right-angle 'fringe-test)

The bitmap disappears if I clear face cache and redraw frame:
(clear-face-cache)
(redraw-frame (selected-frame))


In GNU Emacs 21.3.50.1 (i686-pc-linux-gnu, X toolkit, Xaw3d scroll bars)
 of 2005-01-02 on reed
Distributor `The X.Org Foundation', version 11.0.60700000
Important settings:
  value of $LC_ALL: nil
  value of $LC_COLLATE: nil
  value of $LC_CTYPE: ja_JP.eucJP
  value of $LC_MESSAGES: nil
  value of $LC_MONETARY: nil
  value of $LC_NUMERIC: nil
  value of $LC_TIME: C
  value of $LANG: ja_JP.eucJP
  locale-coding-system: japanese-iso-8bit
  default-enable-multibyte-characters: t

Major mode: Lisp Interaction

Minor modes in effect:
  mouse-wheel-mode: t
  unify-8859-on-encoding-mode: t
  utf-translate-cjk-mode: t
  line-number-mode: t