I have verified the fix using ubuntu-release-upgrader from noble- proposed (via do-release-upgrade --proposed):
root@m:~# cat /etc/os-release PRETTY_NAME="Ubuntu 23.10" NAME="Ubuntu" VERSION_ID="23.10" VERSION="23.10 (Mantic Minotaur)" VERSION_CODENAME=mantic ID=ubuntu ID_LIKE=debian HOME_URL="https://www.ubuntu.com/"; SUPPORT_URL="https://help.ubuntu.com/"; BUG_REPORT_URL="https://bugs.launchpad.net/ubuntu/"; PRIVACY_POLICY_URL="https://www.ubuntu.com/legal/terms-and-policies/privacy-policy"; UBUNTU_CODENAME=mantic LOGO=ubuntu-logo root@m:~# apt install -y libts0 Reading package lists... Done Building dependency tree... Done Reading state information... Done The following NEW packages will be installed: libts0 0 upgraded, 1 newly installed, 0 to remove and 2 not upgraded. Need to get 62.0 kB of archives. After this operation, 313 kB of additional disk space will be used. Get:1 http://archive.ubuntu.com/ubuntu mantic/universe amd64 libts0 amd64 1.22-1 [62.0 kB] Fetched 62.0 kB in 0s (136 kB/s) Selecting previously unselected package libts0:amd64. (Reading database ... 33603 files and directories currently installed.) Preparing to unpack .../libts0_1.22-1_amd64.deb ... Unpacking libts0:amd64 (1.22-1) ... Setting up libts0:amd64 (1.22-1) ... Processing triggers for man-db (2.11.2-3) ... Processing triggers for libc-bin (2.38-1ubuntu6.3) ... Scanning processes... No services need to be restarted. No containers need to be restarted. No user sessions are running outdated binaries. No VM guests are running outdated hypervisor (qemu) binaries on this host. root@m:~# cat > /etc/apt/preferences.d/lp2067071 << EOF Package: libts0t64 Pin: release a=noble Pin-Priority: -1 EOF root@m:~# do-release-upgrade --proposed Checking for a new Ubuntu release = Welcome to Ubuntu 24.04 LTS 'Noble Numbat' = The Ubuntu team is proud to announce Ubuntu 24.04 LTS 'Noble Numbat'. To see what's new in this release, visit: https://wiki.ubuntu.com/NobleNumbat/ReleaseNotes Ubuntu is a Linux distribution for your desktop or server, with a fast and easy install, regular releases, a tight selection of excellent applications installed by default, and almost any other software you can imagine available through the network. We hope you enjoy Ubuntu. == Feedback and Helping == If you would like to help shape Ubuntu, take a look at the list of ways you can participate at http://www.ubuntu.com/community/participate/ Your comments, bug reports, patches and suggestions will help ensure that our next release is the best release of Ubuntu ever. If you feel that you have found a bug please read: http://help.ubuntu.com/community/ReportingBugs Then report bugs using apport in Ubuntu. For example: ubuntu-bug linux will open a bug report in Launchpad regarding the linux package. If you have a question, or if you think you may have found a bug but aren't sure, first try asking on the #ubuntu or #ubuntu-bugs IRC channels on Libera.Chat, on the Ubuntu Users mailing list, or on the Ubuntu forums: http://help.ubuntu.com/community/InternetRelayChat http://lists.ubuntu.com/mailman/listinfo/ubuntu-users http://www.ubuntuforums.org/ == More Information == You can find out more about Ubuntu on our website, IRC channel and wiki. If you're new to Ubuntu, please visit: http://www.ubuntu.com/ To sign up for future Ubuntu announcements, please subscribe to Ubuntu's very low volume announcement list at: http://lists.ubuntu.com/mailman/listinfo/ubuntu-announce Continue [yN] y Get:1 Upgrade tool signature [833 B] Get:2 Upgrade tool [1282 kB] Fetched 1283 kB in 0s (0 B/s) authenticate 'noble.tar.gz' against 'noble.tar.gz.gpg' extracting 'noble.tar.gz' [screen is terminating] root@m:~# cat /etc/os-release PRETTY_NAME="Ubuntu 24.04 LTS" NAME="Ubuntu" VERSION_ID="24.04" VERSION="24.04 LTS (Noble Numbat)" VERSION_CODENAME=noble ID=ubuntu ID_LIKE=debian HOME_URL="https://www.ubuntu.com/"; SUPPORT_URL="https://help.ubuntu.com/"; BUG_REPORT_URL="https://bugs.launchpad.net/ubuntu/"; PRIVACY_POLICY_URL="https://www.ubuntu.com/legal/terms-and-policies/privacy-policy"; UBUNTU_CODENAME=noble LOGO=ubuntu-logo ** Description changed: [Impact] Upgrades to Noble may crash while searching for t64 replacement packages. [Test Plan] One way to reproduce this is by setting Pin-Priority: -1 for a t64 replacement package so that `replacement` will have no candidate. $ apt install -y libts0 $ cat > /etc/apt/preferences.d/lp2067071 << EOF Package: libts0t64 Pin: release a=noble Pin-Priority: -1 EOF - $ do-release-upgrade + $ do-release-upgrade --proposed Before the patch, that will lead to the same crash shown in this bug report. [Where problems could occur] The patch is confined to the t64 replacement quirk. Any other issues would be there. The fix is to simply make sure the replacement has a candidate (i.e. replacement.candidate is not None) before accessing more attributes. [Original Description] it crashes while calculating space - cannot proceed to package downloading. short from the logs: File "/tmp/ubuntu-release-upgrader-4lhpwkx7/DistUpgrade/DistUpgradeCache.py", line 497, in pre_upgrade_rule self.quirks.run("PreDistUpgradeCache") File "/tmp/ubuntu-release-upgrader-4lhpwkx7/DistUpgrade/DistUpgradeQuirks.py", line 95, in run func() File "/tmp/ubuntu-release-upgrader-4lhpwkx7/DistUpgrade/DistUpgradeQuirks.py", line 191, in PreDistUpgradeCache self._install_t64_replacement_packages() File "/tmp/ubuntu-release-upgrader-4lhpwkx7/DistUpgrade/DistUpgradeQuirks.py", line 1845, in _install_t64_replacement_packages if replacement.candidate._cand != ver: ^^^^^^^^^^^^^^^^^^^^^^^^^^^ AttributeError: 'NoneType' object has no attribute '_cand' full logs attached as files. ** Tags removed: verification-needed verification-needed-noble ** Tags added: verification-done verification-done-noble -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2067071 Title: cannot upgrade from 23.10 to 24.04, error in _install_t64_replacement_packages To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/2067071/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
