[Bug 2102720] Re: Failure: The 3.0 solver produced a worse result

[Julian Andres Klode]

Ah I think you have a hold (or pin) on brz; and the new solver now
considers "brz" as obsolete because the candidate version is not
installable anymore, and then tries to prefer to satisfiy

libdpkg-perl Suggests bzr

by installing bzr (it does not want to end up with Suggests getting
broken by upgrades, so it upgrades Suggests that are currently satisfied
to Recommends).

Notes:

As for obsolete, the goal here was to drive migration towards _new_
packages; i.e. instead of bzr and brz you have libfoo1 and libfoo1t64
(w/ provides on amd64); I don't want the solver to install libfoo1 (or
keep it installed) but install libfoo1t64 for you.

Now I think this may interact badly with Suggests promotions...

The other avenue to explore for me is to have a look at why apt here
considers "brz" obsolete in the first place because I just made changes
in 2.9.23 to not treat manually installed packages as obsolete...

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Title:
  Failure: The 3.0 solver produced a worse result

Status in apt package in Ubuntu:
  New

Bug description:
  .

  ProblemType: AptSolver
  DistroRelease: Ubuntu 25.04
  Package: apt 2.9.33
  ProcVersionSignature: Ubuntu 6.14.0-7.7-generic 6.14.0-rc4
  Uname: Linux 6.14.0-7-generic x86_64
  ApportVersion: 2.32.0-0ubuntu2
  Architecture: amd64
  CasperMD5CheckResult: pass
  Date: Sat Mar 15 10:51:29 2025
  ErrorMessage:
   
  InstallationDate: Installed on 2024-04-12 (337 days ago)
  InstallationMedia: Ubuntu 24.04 LTS "Noble Numbat" - Beta amd64 (20240410.2)
  RebootRequiredPkgs: Error: path contained symlinks.
  SourcePackage: apt
  Title: Failure: The 3.0 solver produced a worse result
  UpgradeStatus: Upgraded to plucky on 2024-12-18 (87 days ago)

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