bug#2866: 23.0.91; "(princ (category-table) (current-buffer))" causes emacs to hang

evaluating:
(princ (category-table) (current-buffer))
Causes emacs to hang.

Whether this is a useful way to examine the category-table is another
question entirely :P

I've evaluated the previous expression on two separate builds with
identical (undesirable) results:
---
GNU Emacs 23.0.91.1 (i386-mingw-nt5.1.2600)  of 2009-02-26 on SOFT-MJASON
---
GNU Emacs 23.0.60.1 (i386-mingw-nt5.1.2600) of 2008-10-23 on
LENNART-69DE564 (patched)
Windowing system distributor `Microsoft Corp.', version 5.1.2600
configured using `configure --with-gcc (3.4) --cflags -Ic:/g/include'
---
;;; ==============================
In GNU Emacs 23.0.91.1 (i386-mingw-nt5.1.2600)
 of 2009-02-26 on SOFT-MJASON
Windowing system distributor `Microsoft Corp.', version 5.1.2600
configured using `configure --with-gcc (3.4)'

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: ENU
  value of $XMODIFIERS: nil
  locale-coding-system: cp1252
  default-enable-multibyte-characters: t

Major mode: Lisp Interaction

Minor modes in effect:
  show-paren-mode: t
  display-time-mode: t
  auto-image-file-mode: t
  tooltip-mode: t
  mouse-wheel-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
  size-indication-mode: t
  column-number-mode: t
  line-number-mode: t
  transient-mark-mode: t