Comment 12 for bug 1417880

Any modifications I make to /usr/lib/python3/dist-packages/DistUpgrade/DistUpgradeViewText.py (such as inserting debug print statements) do not take effect.

Is do-release-upgrade actually executing code downloaded from the Internet? Looks like it is.

'DEBUG_UPDATE_MANAGER=1 do-release-upgrade -d' shows me it's downloading a gpg-signed tarball from http://mirror.rackspace.com/ubuntu//dists/utopic/main/dist-upgrader-all/current/utopic.tar.gz, which has an older copy of DistUpgradeViewText.py, without my fix.

Modification times shown at http://archive.ubuntu.com/ubuntu//dists/utopic/main/dist-upgrader-all/current/ indicate that the main archive also lacks this fix.