cron.daily/apt reports MarkUpgrade() called on a non-upgrable pkg: 'linux-headers..."

[latimerio]

Today I received the following messages from /etc/cron.daily/apt on my 14.04 LTS server

MarkUpgrade() called on a non-upgrable pkg: 'linux-headers-3.13.0-73'
MarkUpgrade() called on a non-upgrable pkg: 'linux-image-extra-3.13.0-73-generic'
MarkUpgrade() called on a non-upgrable pkg: 'linux-image-3.13.0-73-generic'
MarkUpgrade() called on a non-upgrable pkg: 'linux-headers-3.13.0-73-generic'

First of all I suppose the message should read non-upgradable
non-upgrable is possibly incorrect and should be corrected.

Secondly I have no clue, what this message means so the error message should be revised to give more details.

I think this as a minor bug but messages should always be correct, precise and possibly helpful.

[Brian Murray (brian-murray)]

The message and typo comes from python-apt.

[Thomas A. F. Thorne (tafthorne)]

Seen in an email this morning from a 16.04 system:
/etc/cron.daily/apt:
MarkUpgrade() called on a non-upgrable pkg: 'linux-image-4.4.0-59-generic'
MarkUpgrade() called on a non-upgrable pkg: 'linux-tools-3.13.0-107-generic'
MarkUpgrade() called on a non-upgrable pkg: 'linux-tools-3.13.0-107'
MarkUpgrade() called on a non-upgrable pkg: 'linux-headers-4.4.0-59-generic'
MarkUpgrade() called on a non-upgrable pkg: 'linux-headers-4.4.0-59'
MarkUpgrade() called on a non-upgrable pkg: 'linux-cloud-tools-3.13.0-107'
MarkUpgrade() called on a non-upgrable pkg: 'linux-cloud-tools-3.13.0-107-generic'

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.