[Bug 1786484] Re: free space need for /usr could be negative which is wrong

[Launchpad Bug Tracker]

** Branch linked: lp:ubuntu-release-upgrader

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https://bugs.launchpad.net/bugs/1786484

Title:
  free space need for /usr could be negative which is wrong

Status in ubuntu-release-upgrader package in Ubuntu:
  In Progress

Bug description:
  In my case I ran out of diskspace in /usr which required a temporary 4
  GB of more data during upgrade. Things just start to fail, and I can
  tell you - then you are screwed. I find this unacceptable for a wide-
  spread official LTS upgrader.

  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: ubuntu-release-upgrader-core 1:18.04.22
  ProcVersionSignature: Ubuntu 4.15.0-30.32-generic 4.15.18
  Uname: Linux 4.15.0-30-generic x86_64
  NonfreeKernelModules: nvidia_modeset nvidia
  ApportVersion: 2.20.9-0ubuntu7.2
  Architecture: amd64
  CrashDB: ubuntu
  CurrentDesktop: KDE
  Date: Fri Aug 10 15:14:33 2018
  InstallationDate: Installed on 2016-01-11 (941 days ago)
  InstallationMedia: Kubuntu 14.04.3 LTS "Trusty Tahr" - Beta amd64 (20150805)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  Symptom: release-upgrade
  UpgradeStatus: Upgraded to bionic on 2018-08-09 (0 days ago)
  mtime.conffile..etc.update-manager.release-upgrades: 2018-08-06T15:08:30.181962

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