package init 1.22ubuntu11 failed to install/upgrade: pre-dependency problem - not installing init

[John Rose]

Upgrading from Trusty to Vivid.

ProblemType: Package
DistroRelease: Ubuntu 15.04
Package: init (not installed)
Uname: Linux 4.2.6-040206-generic x86_64
ApportVersion: 2.17.2-0ubuntu1.8
Architecture: amd64
Date: Fri Dec 18 14:34:51 2015
DuplicateSignature: package:init:1.22ubuntu11:pre-dependency problem - not installing init
ErrorMessage: pre-dependency problem - not installing init
InstallationDate: Installed on 2015-11-26 (22 days ago)
InstallationMedia: Ubuntu 14.04.3 LTS "Trusty Tahr" - Beta amd64 (20150805)
RelatedPackageVersions:
 dpkg 1.17.25ubuntu1.1
 apt 1.0.9.7ubuntu4.2
SourcePackage: init-system-helpers
Title: package init 1.22ubuntu11 failed to install/upgrade: pre-dependency problem - not installing init
UpgradeStatus: Upgraded to vivid on 2015-12-18 (0 days ago)