run whatever inexistent commands, such as 'asdf', got command-not-found has crashed!

[chinalinux]

Binary package hint: command-not-found

# asdf
Sorry, command-not-found has crashed! Please file a bug report at:
https://bugs.launchpad.net/ubuntu/+source/command-not-found
Please include the following information with the report:

command-not-found version: 0.2.21
Python version: 2.5.2 final 0
Distributor ID: Ubuntu
Description: Ubuntu 8.10
Release: 8.10
Codename: intrepid
Exception information:

'ascii' codec can't encode characters in position 7-8: ordinal not in range(128)
Traceback (most recent call last):
  File "/usr/lib/python2.5/site-packages/CommandNotFound/util.py", line 32, in crash_guard
    callback()
  File "/usr/lib/command-not-found", line 15, in main
    parser = OptionParser(version = __version__, usage=_("%prog [options] <command-name>"))
  File "/usr/lib/python2.5/gettext.py", line 584, in lgettext
    return ldgettext(_current_domain, message)
  File "/usr/lib/python2.5/gettext.py", line 556, in ldgettext
    return t.lgettext(message)
  File "/usr/lib/python2.5/gettext.py", line 366, in lgettext
    return tmsg.encode(locale.getpreferredencoding())
UnicodeEncodeError: 'ascii' codec can't encode characters in position 7-8: ordinal not in range(128)
-bash: asdf command not found

PS: I run the command mentioned above on the console(CTRL+ALT+F1), my OS version is Ubuntu 8.10, the environment variable LANG=zh_CN.UTF-8