[Bug 1737445] Re: release upgrader doesn't re-enable updates after failure

[Simon Lambourn]

I'm really sorry but I have failed to re-create the bug on my own
system.   As I didn't discover the problem for at least a month, I can't
remember exactly when it occurred or what I did to make it happen.   I
do remember that after the first attempt to upgrade, there was a problem
with using the "revert" button on the Software Sources application,
which re-enabled all the Artful sources even though I hadn't upgraded -
so I had to manually alter the /etc/apt/sources.list to go back to
Zesty.   I'm pretty sure that I would have enabled all the Zesty sources
including updates, as the sources.list is not that complicated.

However I can't tell you how this happened, so regrettably I think I
have to withdraw the bug report (or at least ask you to do so).   I
apologise for wasting your time on this one.

** Attachment added: "/etc/apt/sources.list"
   https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1737445/+attachment/5023303/+files/sources.list

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https://bugs.launchpad.net/bugs/1737445

Title:
  release upgrader doesn't re-enable updates after failure

Status in ubuntu-release-upgrader package in Ubuntu:
  Incomplete
Status in ubuntu-release-upgrader source package in Bionic:
  Incomplete

Bug description:
  If a release upgrade fails (my example is in a failure to calculate
  the upgrade: https://bugs.launchpad.net/bugs/1726180) the software
  sources are reset but updates are not re-enabled,   This has meant in
  my case going a month without updates, which introduces a security
  exposure to my system.

  In my case, the first two updates on the "Updates" tab of software
  sources should have been re-enabled (zesty-security and zesty-
  updates), but were not.

  Expected behaviour:  if the release upgrader cannot complete the
  upgrade, it should reinstate the software sources as they were prior
  to the upgrade.

  ProblemType: Bug
  DistroRelease: Ubuntu 17.04
  Package: ubuntu-release-upgrader-core 1:17.04.10
  ProcVersionSignature: Ubuntu 4.10.0-38.42-generic 4.10.17
  Uname: Linux 4.10.0-38-generic x86_64
  ApportVersion: 2.20.4-0ubuntu4.9
  Architecture: amd64
  CrashDB: ubuntu
  CurrentDesktop: Unity:Unity7
  Date: Sun Dec 10 23:00:41 2017
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  Symptom: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to zesty on 2017-12-09 (1 days ago)
  VarLogDistupgradeTermlog:

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