[Bug 1886748] Re: upgrade from 18.04 to 20.04 fails to calculate with clang-6.0 and pocl-opencl-icd installed

[Brian Murray]

Removing libomp5 after adjusting sources.list from bionic to focal
allows the upgrade to calculate.

bdmurray at clean-bionic-amd64:~$ sudo apt-get remove libomp5
Reading package lists... Done  
Building dependency tree
Reading state information... Done
Starting pkgProblemResolver with broken count: 1
Starting 2 pkgProblemResolver with broken count: 1
Investigating (0) libomp-dev:amd64 < 5.0.1-1 -> 1:10.0-50~exp1 @ii umU Ib >
Broken libomp-dev:amd64 Depends on libomp-10-dev:amd64 < none | 1:10.0.0-4ubuntu1 @un uH > (>= 10~)
  Considering libomp-10-dev:amd64 0 as a solution to libomp-dev:amd64 0
  Re-Instated libomp5-10:amd64 
  Re-Instated gcc-10-base:amd64
  Re-Instated libgcc-s1:amd64  
  Re-Instated libomp-10-dev:amd64
  Re-Instated libomp-dev:amd64 
Done
The following additional packages will be installed:
  gcc-10-base libgcc-s1 libomp-10-dev libomp-dev libomp5-10
Suggested packages:
  libomp-10-doc
The following packages will be REMOVED:
  libomp5
The following NEW packages will be installed:
  gcc-10-base libgcc-s1 libomp-10-dev libomp5-10
The following packages will be upgraded:
  libomp-dev
1 upgraded, 4 newly installed, 1 to remove and 1409 not upgraded.
Need to get 411 kB of archives.
After this operation, 1,863 kB of additional disk space will be used.

-- 
You received this bug notification because you are a member of Ubuntu
Foundations Bugs, which is subscribed to ubuntu-release-upgrader in
Ubuntu.
https://bugs.launchpad.net/bugs/1886748

Title:
  upgrade from 18.04 to 20.04 fails to calculate with clang-6.0 and
  pocl-opencl-icd installed

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

Bug description:
  ~$ sudo do-release-upgrade -d
  Checking for a new Ubuntu release
  Get:1 Upgrade tool signature [1,554 B]                                                                                              
  Get:2 Upgrade tool [1,342 kB]                                                                                                       
  Fetched 1,343 kB in 0s (0 B/s)                                                                                                      
  authenticate 'focal.tar.gz' against 'focal.tar.gz.gpg' 
  extracting 'focal.tar.gz'

  Reading cache

  Checking package manager
  Reading package lists... Done
  Building dependency tree        
  Reading state information... Done
  Hit http://archive.ubuntu.com/ubuntu bionic InRelease                                                                               
  Hit http://archive.ubuntu.com/ubuntu bionic-updates InRelease                                                                       
  Hit http://archive.ubuntu.com/ubuntu bionic-backports InRelease                                                                     
  Hit http://archive.ubuntu.com/ubuntu bionic-security InRelease                                                                      
  Fetched 0 B in 0s (0 B/s)                                                                                                           
  Reading package lists... Done    
  Building dependency tree          
  Reading state information... Done

  Updating repository information
  Hit http://archive.ubuntu.com/ubuntu focal InRelease                                                                                
  Hit http://archive.ubuntu.com/ubuntu focal-updates InRelease                                                                        
  Hit http://archive.ubuntu.com/ubuntu focal-backports InRelease                                                                      
  Hit http://archive.ubuntu.com/ubuntu focal-security InRelease                                                                       
  Fetched 0 B in 0s (0 B/s)                                                                                                           

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

  Calculating the changes

  Calculating the changes

  Could not calculate the upgrade

  An unresolvable problem occurred while calculating the upgrade.

  This was caused by: 
  * Upgrading to a pre-release version of Ubuntu 
  This is most likely a transient problem, 
  please try again later. 
  If none of this applies, then please report this bug using the 
  command 'ubuntu-bug ubuntu-release-upgrader-core' in a terminal. If 
  you want to investigate this yourself the log files in 
  '/var/log/dist-upgrade' will contain details about the upgrade. 
  Specifically, look at 'main.log' and 'apt.log'. 

  
  Restoring original system state

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

  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: ubuntu-release-upgrader-core 1:18.04.37
  ProcVersionSignature: Ubuntu 4.15.0-109.110-generic 4.15.18
  Uname: Linux 4.15.0-109-generic x86_64
  ApportVersion: 2.20.9-0ubuntu7.15
  Architecture: amd64
  CrashDB: ubuntu
  CurrentDesktop: XFCE
  Date: Wed Jul  8 13:26:03 2020
  InstallationDate: Installed on 2018-02-19 (869 days ago)
  InstallationMedia: Xubuntu 17.10 "Artful Aardvark" - Release amd64 (20180105)
  PackageArchitecture: all
  SourcePackage: ubuntu-release-upgrader
  UpgradeStatus: Upgraded to bionic on 2020-07-08 (0 days ago)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1886748/+subscriptions