Comment 11 for bug 1783597

Verified ubuntu-release-upgrader 19.04.16.7 as per the test-case.

I set up a multipass bionic system, switched /etc/update-manager/release-upgrades to Prompt=normal, installed ubuntu-desktop, installed the core18 snap (from stable) and gnome-characters snap (from stable/ubuntu-18.04). I then proceeded with running `do-release-upgrade --frontend DistUpgradeView --proposed`. The upgrade succeeded, I have confirmed that 19.04.16.7 was used [1], checked that all snaps have been refreshed correctly. Also, checked that '/var' is listed in the snap estimates [2].

Will still check if update-manager is fine before switching the tag to verification-done.

[1] 2019-10-09 13:28:16,936 INFO release-upgrader version '19.04.16.7' started
[2] 2019-10-09 13:29:05,882 DEBUG dir '/var' needs '9207808' of '<DistUpgrade.DistUpgradeCache.MyCache.checkFreeSpace.<locals>.FreeSpace object at 0x7f837003a278>' (9367467576.000000)