Dist-upgrade failed with no explanation (real reason: blacklisted ubuntu-next)

[Cris Dywan]

> do-release-upgrade -d
[…]
Änderungen werden berechnet

Es konnte nicht ermittelt werden, welche Systemaktualisierungen
verfügbar sind

Ein unlösbares Problem trat beim Ermitteln der Systemaktualisierung
auf.
[…]

> tail /var/log/dist-upgrade/main.log
2014-11-21 13:32:56,079 DEBUG blacklist expr 'ubuntu-desktop' matches 'ubuntu-desktop-next'
2014-11-21 13:32:56,079 DEBUG The package 'ubuntu-desktop-next' is marked for removal but it's in the removal blacklist
2014-11-21 13:32:56,186 ERROR Dist-upgrade failed: 'Das Paket »ubuntu-desktop-next« ist zum Löschen vorgesehen, wurde aber durch das System gesperrt.'
2014-11-21 13:32:56,187 DEBUG abort called

Full logs attached.

Neither the GUI upgrade nor the command line told me why it failed nor did it point me at the relevant log; I only found it by asking a helpful follow Ubuntu user. Where then I discovered the ERROR.

[Brian Murray (brian-murray)]

Given that ubuntu-desktop-next is universe and Vivid is not yet even Alpha 1, I'm lowering the importance of this bug.

[Cris Dywan (kalikiana)]

So if I see correctly the fix is changing the blacklist - what about the lack of error handling here? It seems that this will remain a recurring problem?

[Brian Murray (brian-murray)]

On Fri, Nov 21, 2014 at 11:46:05PM -0000, Christian Dywan wrote:
> So if I see correctly the fix is changing the blacklist - what about the
> lack of error handling here? It seems that this will remain a recurring
> problem?

That may be covered by the following bug:

https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/934371

--
Brian Murray
Ubuntu Bug Master

[Launchpad Janitor (janitor)]

This bug was fixed in the package ubuntu-release-upgrader - 1:15.04.1

---------------
ubuntu-release-upgrader (1:15.04.1) vivid; urgency=medium

  * data/removal_blacklist.cfg: Modify entry for ubuntu-desktop to be
    ubuntu-desktop$ so that it doesn't match ubuntu-desktop-next.
    (LP: #1395000)
  * DistUpgrade/DistUpgradeApport.py: set DistroRelease to the release we are
    upgrading to not the one which we are upgrading from.
 -- Brian Murray <email address hidden> Wed, 03 Dec 2014 13:08:02 -0800