Προέκυψε μοιραίο σφάλμα

Παρακαλώ αναφέρετε σαν σφάλμα και συμπεριλάβετε τα αρχεία
/var/log/dist-upgrade/main.log και /var/log/dist-upgrade/apt.log στην
αναφορά σας. Η αναβάθμιση ματαιώθηκε.
Το αρχικό sources.list σας αποθηκεύτηκε στο
/etc/apt/sources.list.distUpgrade.

Traceback (most recent call last):

File "/tmp/ubuntu-release-upgrader-den37i/trusty", line 10, in
<module>
sys.exit(main())

File
"/tmp/ubuntu-release-upgrader-den37i/DistUpgrade/DistUpgradeMain.py",
line 243, in main
if app.run():

File
"/tmp/ubuntu-release-upgrader-den37i/DistUpgrade/DistUpgradeController.py",
line 1827, in run
return self.fullUpgrade()

File
"/tmp/ubuntu-release-upgrader-den37i/DistUpgrade/DistUpgradeController.py",
line 1780, in fullUpgrade
if not self.askDistUpgrade():

File
"/tmp/ubuntu-release-upgrader-den37i/DistUpgrade/DistUpgradeController.py",
line 1006, in askDistUpgrade
self.cache.required_download)

File
"/tmp/ubuntu-release-upgrader-den37i/DistUpgrade/DistUpgradeViewText.py",
line 178, in confirmChanges
res = sys.stdin.readline().decode(ENCODING, "backslashreplace")

File "/usr/lib/python2.7/encodings/utf_8.py", line 16, in decode
return codecs.utf_8_decode(input, errors, True)

TypeError: don't know how to handle UnicodeDecodeError in error
callback