[Bug 1876282] Re: libc++1 is kept back after upgrade to focal

[Øby]

I had the same issue, and the solution posted here appears to have worked perfectly:
https://ubuntuforums.org/showthread.php?t=2441409

(Make sure to do the simulation with the -s flag first, to ensure that
there are no other packages affected by a forced upgrade than those of
libc++1* packages – see the example output of the simulation run in the
above-linked thread.

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https://bugs.launchpad.net/bugs/1876282

Title:
  libc++1 is kept back after upgrade to focal

Status in ubuntu-release-upgrader package in Ubuntu:
  Confirmed

Bug description:
  The upgrade process went very smooth with it asking me to approve some fixes to a few files I have modified on my own. After the upgrade I run:
  `sudo apt update && sudo apt upgrade`.

  I expected this to show no updates, or maybe just a few minor ones, but insted I got:
  ```Reading package lists... Done
  Building dependency tree       
  Reading state information... Done
  Calculating upgrade... Done
  The following packages have been kept back:
    libc++1
  0 upgraded, 0 newly installed, 0 to remove and 1 not upgraded.
  ```

  It's fixed by
  `sudo apt install libc++1`
  but should be considered a bug in the upgrade process.

  ProblemType: Bug
  DistroRelease: Ubuntu 20.04
  Package: ubuntu-release-upgrader-core 1:20.04.18
  ProcVersionSignature: Ubuntu 5.4.0-28.32-generic 5.4.30
  Uname: Linux 5.4.0-28-generic x86_64
  ApportVersion: 2.20.11-0ubuntu27
  Architecture: amd64
  CasperMD5CheckResult: skip
  CrashDB: ubuntu
  CurrentDesktop: ubuntu:GNOME
  Date: Fri May  1 13:05:36 2020
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  Symptom: dist-upgrade
  UpgradeStatus: Upgraded to focal on 2020-05-01 (0 days ago)
  VarLogDistupgradeTermlog:

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