XEmacs gets SIGSEGV in sys_re_search_2 when loading UTF8 file

[Greg S]

Binary package hint: xemacs21-mule

$ od -x /tmp/xemacs-crash-4.txt
0000000 97d0 000a
0000003

$ cat ~/.xemacs/init.el
;; Custom modified Mule font setup from
;; http://www.dotemacs.de/dotfiles/EugeneMorozov/EugeneMorozov.emacs.html
(progn
  (set-language-environment "Cyrillic-KOI8")
  (prefer-coding-system 'koi8-r)

  (set-face-font
   'default
   '("-monotype-courier new-semilight-r-*-*-17-*-*-*-*-*-iso8859-1"
     "-monotype-courier new-semilight-r-*-*-17-*-*-*-*-*-iso8859-2"
     "-monotype-courier new-semilight-r-*-*-17-*-*-*-*-*-iso8859-3"
     "-monotype-courier new-semilight-r-*-*-17-*-*-*-*-*-iso8859-4"
     "-monotype-courier new-semilight-r-*-*-17-*-*-*-*-*-iso8859-5"
     "-monotype-courier new-semilight-r-*-*-17-*-*-*-*-*-iso8859-7"
     "-monotype-courier new-semilight-r-*-*-17-*-*-*-*-*-iso8859-8"
     "-monotype-courier new-semilight-r-*-*-17-*-*-*-*-*-iso8859-9")
   'global '(mule-fonts) 'prepend))

;; Adds unicode encodings to Mule
;; http://www.suse.de/~mfabian/suse-cjk/emacs-and-xemacs.html
(when (locate-library "un-define")
  (require 'un-define)
  (require 'unicode)
  ;; requiring unidata is optional:
  (require 'unidata))

;; Files are read as UTF-8
(set-buffer-file-coding-system-for-read 'utf-8)

$ gdb /usr/bin/xemacs-21.4.21-mule

(gdb) run /tmp/xemacs-crash-4.txt
Starting program: /usr/bin/xemacs-21.4.21-mule /tmp/xemacs-crash-4.txt
...
Warning: Missing charsets in String to FontSet conversion

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x7fc115fa06e0 (LWP 12909)]
0x000000000053ed49 in sys_re_search_2 ()
(gdb) where
#0 0x000000000053ed49 in sys_re_search_2 ()
#1 0x000000000053f023 in sys_re_search ()
#2 0x000000000054118c in fast_string_match ()
#3 0x000000000056d536 in ?? ()
#4 0x000000000056d76d in ?? ()
#5 0x00000000005197dd in ?? ()
#6 0x0000000000483988 in ?? ()
#7 0x000000000048052e in internal_catch ()
#8 0x00000000004836b7 in call_with_suspended_errors ()
#9 0x0000000000549c08 in ?? ()
#10 0x0000000000549efc in specifier_instance ()
#11 0x000000000054a4e6 in specifier_instance_no_quit ()
#12 0x00000000004ce138 in face_property_matching_instance ()
#13 0x00000000004ce29e in ensure_face_cachel_contains_charset ()
#14 0x000000000052378c in ?? ()
#15 0x000000000052bd56 in ?? ()
#16 0x000000000052cbe1 in ?? ()
#17 0x00000000005300ad in ?? ()
#18 0x0000000000530d05 in redisplay_frame ()
#19 0x00000000005311a8 in ?? ()
#20 0x00000000005315fa in redisplay ()
#21 0x00000000004c0a33 in Fnext_event ()
#22 0x0000000000466dd5 in Fcommand_loop_1 ()
#23 0x0000000000483b06 in condition_case_1 ()
#24 0x0000000000467000 in ?? ()
#25 0x000000000048052e in internal_catch ()
#26 0x0000000000467384 in initial_command_loop ()
#27 0x000000000047d8fd in xemacs_21_4_21_x86_64_pc_linux ()
#28 0x000000000047e520 in main ()

ProblemType: Bug
Architecture: amd64
Date: Thu May 7 15:18:41 2009
DistroRelease: Ubuntu 8.04
NonfreeKernelModules: ath_hal
Package: xemacs21-mule 21.4.21-1ubuntu3.1
PackageArchitecture: amd64
ProcEnviron:
 PATH=/home/username/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/home/username/bin
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: xemacs21
Uname: Linux 2.6.24-23-generic x86_64