[Bug 1899966] [NEW] tried to do `apt do-release-upgrade -d` from 20.04 to 20.10

[Vadim Besedin]

Public bug reported:

here is the summary trying to upgrade to 20.10

Building dependency tree          
Reading state information... Done

Checking for installed snaps

Calculating snap size requirements

Updating repository information

Third party sources disabled

Some third party entries in your sources.list were disabled. You can 
re-enable them after the upgrade with the 'software-properties' tool 
or your package manager. 

To continue please press [ENTER]

Get:1 http://archive.canonical.com/ubuntu groovy InRelease [11,4 kB]                                                                                       
Get:2 http://archive.canonical.com/ubuntu groovy/partner amd64 Packages [1 296 B]                                                                          
Get:3 http://archive.canonical.com/ubuntu groovy/partner Translation-en [540 B]                                                                            
Fetched 13,2 kB in 6s (0 B/s)                                                                                                                              

Checking package manager
Reading package lists... Done    
Building dependency tree          
Reading state information... Done

Invalid package information

After updating your package information, the essential package 
'ubuntu-minimal' could not be located. This may be because you have 
no official mirrors listed in your software sources, or because of 
excessive load on the mirror you are using. See /etc/apt/sources.list 
for the current list of configured software sources. 
In the case of an overloaded mirror, you may want to try the upgrade 
again later. 


Restoring original system state

Aborting
Reading package lists... Done    
Building dependency tree          
Reading state information... Done

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: ubuntu-release-upgrader-core 1:20.04.28
ProcVersionSignature: Ubuntu 5.4.0-51.56-generic 5.4.65
Uname: Linux 5.4.0-51-generic x86_64
ApportVersion: 2.20.11-0ubuntu27.10
Architecture: amd64
CasperMD5CheckResult: skip
CrashDB: ubuntu
Date: Thu Oct 15 15:15:26 2020
InstallationDate: Installed on 2020-04-28 (169 days ago)
InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423)
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to focal on 2020-10-15 (0 days ago)
VarLogDistupgradeAptlog:
 Log time: 2020-10-15 15:13:03.372824
 Log time: 2020-10-15 15:14:15.822017
 Log time: 2020-10-15 15:15:26.568254
 Log time: 2020-10-15 15:15:28.472538
mtime.conffile..etc.update-manager.release-upgrades: 2020-04-28T16:10:10.792755

** Affects: ubuntu-release-upgrader (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug dist-upgrade focal package-from-proposed third-party-packages

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https://bugs.launchpad.net/bugs/1899966

Title:
  tried to do `apt do-release-upgrade -d` from 20.04 to 20.10

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

Bug description:
  here is the summary trying to upgrade to 20.10

  Building dependency tree          
  Reading state information... Done

  Checking for installed snaps

  Calculating snap size requirements

  Updating repository information

  Third party sources disabled

  Some third party entries in your sources.list were disabled. You can 
  re-enable them after the upgrade with the 'software-properties' tool 
  or your package manager. 

  To continue please press [ENTER]

  Get:1 http://archive.canonical.com/ubuntu groovy InRelease [11,4 kB]                                                                                       
  Get:2 http://archive.canonical.com/ubuntu groovy/partner amd64 Packages [1 296 B]                                                                          
  Get:3 http://archive.canonical.com/ubuntu groovy/partner Translation-en [540 B]                                                                            
  Fetched 13,2 kB in 6s (0 B/s)                                                                                                                              

  Checking package manager
  Reading package lists... Done    
  Building dependency tree          
  Reading state information... Done

  Invalid package information

  After updating your package information, the essential package 
  'ubuntu-minimal' could not be located. This may be because you have 
  no official mirrors listed in your software sources, or because of 
  excessive load on the mirror you are using. See /etc/apt/sources.list 
  for the current list of configured software sources. 
  In the case of an overloaded mirror, you may want to try the upgrade 
  again later. 

  
  Restoring original system state

  Aborting
  Reading package lists... Done    
  Building dependency tree          
  Reading state information... Done

  ProblemType: Bug
  DistroRelease: Ubuntu 20.04
  Package: ubuntu-release-upgrader-core 1:20.04.28
  ProcVersionSignature: Ubuntu 5.4.0-51.56-generic 5.4.65
  Uname: Linux 5.4.0-51-generic x86_64
  ApportVersion: 2.20.11-0ubuntu27.10
  Architecture: amd64
  CasperMD5CheckResult: skip
  CrashDB: ubuntu
  Date: Thu Oct 15 15:15:26 2020
  InstallationDate: Installed on 2020-04-28 (169 days ago)
  InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to focal on 2020-10-15 (0 days ago)
  VarLogDistupgradeAptlog:
   Log time: 2020-10-15 15:13:03.372824
   Log time: 2020-10-15 15:14:15.822017
   Log time: 2020-10-15 15:15:26.568254
   Log time: 2020-10-15 15:15:28.472538
  mtime.conffile..etc.update-manager.release-upgrades: 2020-04-28T16:10:10.792755

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