Thanks for your bugreport.
Could you please check with:
$ sudo cat /tmp/update-manager-VGGglZ/DistUpgradeVersion.py
what version you are using?
This should be fixed in version 0.152.25.1 that got uploaded a couple of hours
ago. If you have this
version and its still crashing the fix is incomplete :/
** Changed in: update-manager (Ubuntu)
Status: New => Incomplete
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https://bugs.launchpad.net/bugs/873974
Title:
do-release-upgrade fails from 11.04 to 11.10 due to missing btrfs-
tools package
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