Failure: The 3.0 solver produced a worse result: fewer upgrades counted as worse

[Alan Santos]

Ocurred when closing rhytminbox

ProblemType: AptSolver
DistroRelease: Ubuntu 25.04
Package: apt 2.9.34
ProcVersionSignature: Ubuntu 6.14.0-13.13-generic 6.14.0
Uname: Linux 6.14.0-13-generic x86_64
ApportVersion: 2.32.0-0ubuntu3
Architecture: amd64
CasperMD5CheckResult: pass
Date: Sat Mar 29 14:47:42 2025
InstallationDate: Installed on 2025-03-29 (0 days ago)
InstallationMedia: Ubuntu 25.04 "Plucky Puffin" - Beta amd64 (20250326.6)
SourcePackage: apt
Title: Failure: The 3.0 solver produced a worse result
UpgradeStatus: No upgrade log present (probably fresh install)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Julian Andres Klode (juliank)]

Thanks for your report.

When I developed the solver evaluation, It seems I did not consider that "more upgrades" is worse when it comes to an "install" command, I always counted "more upgrades" as a better solution.

And I changed the classic solver a while ago to upgrade all binaries produced by a source package when installing a new version of one of them; but the new solver doesn't have that - it upgrades as few packages as possible.

[Launchpad Janitor (janitor)]

This bug was fixed in the package apt - 3.0.0

---------------
apt (3.0.0) unstable; urgency=medium

  [ Julian Andres Klode ]
  * And so it begins: Bump the version to 3.0 to mark the start
    of a stable series, dedicated to Steve Langasek.
  * symbols: Update to 2.9.35
  * solver3: Consider more upgrades more costly when not upgrading
    (LP: #2105395)

  [ Frans Spiesschaert ]
  * Dutch manpages translation update (Closes: #1100801)
  * Dutch program translation update (Closes: #1100807)

  [ Rafael Fontenelle ]
  * Brazilian Portuguese program translation update (Closes: #1100964)

  [ Remus-Gabriel Chelu ]
  * Romanian program translation update (Closes: #1101535)

  [ Carles Pina i Estany ]
  * Catalan program translation update

  [ Helge Kreutzmann ]
  * German program translation update (Closes: #1100550)

  [ bubub ]
  * French program translation update (Closes: #1100708)

 -- Julian Andres Klode <email address hidden> Fri, 04 Apr 2025 22:32:19 +0200