Ubuntu-Command-not-found

Die Anwendung command-not-found ist abgest\xfcrzt! Bitte berichten Sie \xfcber den Fehler unter:
https://bugs.launchpad.net/command-not-found/+filebug
Bitte f\xfchren Sie folgende Informationen im Fehlerbericht an:

Command-not-found-Version: 0.3
Python-Version: 3.4.0 final 0
Distributor ID: Ubuntu
Description:    Ubuntu 14.04.1 LTS
Release:        14.04
Codename:       trusty
Informationen zum Fehler:

'utf-8' codec can't encode character '\udcef' in position 0: surrogates not allowed
Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/CommandNotFound/util.py", line 24, in crash_guard
    callback()
  File "/usr/lib/command-not-found", line 90, in main
    if not cnf.advise(args[0], options.ignore_installed) and not options.no_failure_msg:
  File "/usr/lib/python3/dist-packages/CommandNotFound/CommandNotFound.py", line 265, in advise
    packages = self.getPackages(command)
  File "/usr/lib/python3/dist-packages/CommandNotFound/CommandNotFound.py", line 157, in getPackages
    result.update([(pkg, db.component) for pkg in db.lookup(command)])
  File "/usr/lib/python3/dist-packages/CommandNotFound/CommandNotFound.py", line 85, in lookup
    result = self.db.lookup(command)
  File "/usr/lib/python3/dist-packages/CommandNotFound/CommandNotFound.py", line 41, in lookup
    key = key.encode('utf-8')
UnicodeEncodeError: 'utf-8' codec can't encode character '\udcef' in position 0: surrogates not allowed