I was able to recreate the failure to calculate the upgrade by installing the packages clang-6.0 and pocl-opencl-icd.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to 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 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1886748/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs