[Bug 1544942] [NEW] removes unneeded packages even if --dry-run is used

[Jarno Suni]

Public bug reported:

The two consequent runs of unattended-upgrade shows the difference:

$ sudo unattended-upgrade --dry-run -d
Initial blacklisted packages: 
Initial whitelisted packages: 
Starting unattended upgrades script
Allowed origins are: ['o=Ubuntu,a=wily-security']
pkgs that look like they should be upgraded: 
Fetched 0 B in 0s (0 B/s)                                                 
fetch.run() result: 0
blacklist: []
whitelist: []
Option --dry-run given, *not* performing real actions
Packages that will be upgraded: 
marking linux-headers-4.2.0-16-generic for remove
marking linux-headers-4.2.0-16 for remove
marking linux-image-4.2.0-16-generic for remove
marking linux-image-extra-4.2.0-16-generic for remove
Packages that are auto removed: 'linux-headers-4.2.0-16-generic linux-headers-4.2.0-16 linux-image-4.2.0-16-generic linux-image-extra-4.2.0-16-generic'
/usr/bin/dpkg --status-fd 9 --force-depends --force-remove-essential --remove linux-headers-4.2.0-16-generic:amd64 linux-headers-4.2.0-16:all linux-image-extra-4.2.0-16-generic:amd64 linux-image-4.2.0-16-generic:amd64 
/usr/bin/dpkg --status-fd 11 --configure --pending 
Packages were successfully auto-removed
InstCount=0 DelCount=4 BrokenCount=0
$ sudo unattended-upgrade --dry-run -d
Initial blacklisted packages: 
Initial whitelisted packages: 
Starting unattended upgrades script
Allowed origins are: ['o=Ubuntu,a=wily-security']
pkgs that look like they should be upgraded: 
Fetched 0 B in 0s (0 B/s)                                                 
fetch.run() result: 0
blacklist: []
whitelist: []
No packages found that can be upgraded unattended and no pending auto-removals

Expected behaviour is that dpkg is run with --dry-run, if unattended-
upgrade is run with that, so that it does not actually remove packages.

ProblemType: Bug
DistroRelease: Ubuntu 15.10
Package: unattended-upgrades 0.86.2ubuntu1.1
ProcVersionSignature: Ubuntu 4.2.0-27.32-generic 4.2.8-ckt1
Uname: Linux 4.2.0-27-generic x86_64
ApportVersion: 2.19.1-0ubuntu5
Architecture: amd64
CurrentDesktop: XFCE
Date: Fri Feb 12 13:58:29 2016
EcryptfsInUse: Yes
InstallationDate: Installed on 2016-01-24 (18 days ago)
InstallationMedia: Xubuntu 15.10 "Wily Werewolf" - Release amd64 (20151021)
PackageArchitecture: all
SourcePackage: unattended-upgrades
UpgradeStatus: No upgrade log present (probably fresh install)
mtime.conffile..etc.apt.apt.conf.d.50unattended.upgrades: 2016-02-12T13:53:13.426454

** Affects: unattended-upgrades (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug wily

-- 
You received this bug notification because you are a member of Ubuntu
Foundations Bugs, which is subscribed to unattended-upgrades in Ubuntu.
https://bugs.launchpad.net/bugs/1544942

Title:
  removes unneeded packages even if --dry-run is used

Status in unattended-upgrades package in Ubuntu:
  New

Bug description:
  The two consequent runs of unattended-upgrade shows the difference:

  $ sudo unattended-upgrade --dry-run -d
  Initial blacklisted packages: 
  Initial whitelisted packages: 
  Starting unattended upgrades script
  Allowed origins are: ['o=Ubuntu,a=wily-security']
  pkgs that look like they should be upgraded: 
  Fetched 0 B in 0s (0 B/s)                                                 
  fetch.run() result: 0
  blacklist: []
  whitelist: []
  Option --dry-run given, *not* performing real actions
  Packages that will be upgraded: 
  marking linux-headers-4.2.0-16-generic for remove
  marking linux-headers-4.2.0-16 for remove
  marking linux-image-4.2.0-16-generic for remove
  marking linux-image-extra-4.2.0-16-generic for remove
  Packages that are auto removed: 'linux-headers-4.2.0-16-generic linux-headers-4.2.0-16 linux-image-4.2.0-16-generic linux-image-extra-4.2.0-16-generic'
  /usr/bin/dpkg --status-fd 9 --force-depends --force-remove-essential --remove linux-headers-4.2.0-16-generic:amd64 linux-headers-4.2.0-16:all linux-image-extra-4.2.0-16-generic:amd64 linux-image-4.2.0-16-generic:amd64 
  /usr/bin/dpkg --status-fd 11 --configure --pending 
  Packages were successfully auto-removed
  InstCount=0 DelCount=4 BrokenCount=0
  $ sudo unattended-upgrade --dry-run -d
  Initial blacklisted packages: 
  Initial whitelisted packages: 
  Starting unattended upgrades script
  Allowed origins are: ['o=Ubuntu,a=wily-security']
  pkgs that look like they should be upgraded: 
  Fetched 0 B in 0s (0 B/s)                                                 
  fetch.run() result: 0
  blacklist: []
  whitelist: []
  No packages found that can be upgraded unattended and no pending auto-removals

  Expected behaviour is that dpkg is run with --dry-run, if unattended-
  upgrade is run with that, so that it does not actually remove
  packages.

  ProblemType: Bug
  DistroRelease: Ubuntu 15.10
  Package: unattended-upgrades 0.86.2ubuntu1.1
  ProcVersionSignature: Ubuntu 4.2.0-27.32-generic 4.2.8-ckt1
  Uname: Linux 4.2.0-27-generic x86_64
  ApportVersion: 2.19.1-0ubuntu5
  Architecture: amd64
  CurrentDesktop: XFCE
  Date: Fri Feb 12 13:58:29 2016
  EcryptfsInUse: Yes
  InstallationDate: Installed on 2016-01-24 (18 days ago)
  InstallationMedia: Xubuntu 15.10 "Wily Werewolf" - Release amd64 (20151021)
  PackageArchitecture: all
  SourcePackage: unattended-upgrades
  UpgradeStatus: No upgrade log present (probably fresh install)
  mtime.conffile..etc.apt.apt.conf.d.50unattended.upgrades: 2016-02-12T13:53:13.426454

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/unattended-upgrades/+bug/1544942/+subscriptions