package postgresql-common 166bzr2 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1

[RC]

This bug is for ubuntu 15.04

ProblemType: Package
DistroRelease: Ubuntu 15.04
Package: postgresql-common 166bzr2
ProcVersionSignature: Ubuntu 3.11.0-24.42-generic 3.11.10.11
Uname: Linux 3.11.0-24-generic x86_64
ApportVersion: 2.17.2-0ubuntu1
Architecture: amd64
Date: Sun Apr 26 21:24:50 2015
DuplicateSignature: package:postgresql-common:166bzr2:subprocess installed post-installation script returned error exit status 1
ErrorMessage: subprocess installed post-installation script returned error exit status 1
InstallationDate: Installed on 2013-10-10 (562 days ago)
InstallationMedia: Xubuntu 13.04 "Raring Ringtail" - Release amd64 (20130423.1)
PackageArchitecture: all
RelatedPackageVersions:
 dpkg 1.17.25ubuntu1
 apt 1.0.9.7ubuntu4
SourcePackage: postgresql-common
Title: package postgresql-common 166bzr2 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1
UpgradeStatus: Upgraded to vivid on 2015-04-26 (0 days ago)

[Martin Pitt (pitti)]

insserv: warning: script is corrupt or invalid: /etc/init.d/../rc2.d/S01shm_load
insserv: script docker.io: service docker already provided!
insserv: warning: script 'nexus' missing LSB tags and overrides
insserv: There is a loop between service monit and nexus if stopped
insserv: loop involving service nexus at depth 2
insserv: loop involving service monit at depth 1
insserv: Stopping nexus depends on monit and therefore on system facility `$all' which can not be true!

This is a problem with some third-party or custom init.d scripts. Please fix them, then everything should be working again.