** Description changed: + [Impact] + + The backend API change made update-manager crash when the updated + incompatible backend was loaded to the not updated running update- + manager process. + + The issue causes crashes upon update-manager updates harming the upgrade + experience for users. + + The fix avoids lazy loading of the backend modules but still honors the + backend selection options. + + [Test Case] + + + 1. Start with a fully upgraded system and downgrade a few packages to let u-m upgrade them and also downgrade update-manager to 1:16.04.12 or earlier: + $ sudo eatmydata apt install -y --allow-downgrades gnome-software=3.28.1-0ubuntu4 gnome-software-common=3.28.1-0ubuntu4 + $ sudo apt install update-manager=1:16.04.12 update-manager-core=1:16.04.12 python3-update-manager=1:16.04.12 + + 2. Start u-m with: + $ update-manager --no-update + + 3. Upgrade update-manager to a still not fixed version to observe the crash: + $ sudo apt install update-manager=1:16.04.14 update-manager-core=1:16.04.14 python3-update-manager=1:16.04.14 + + ... or to the fixed version to a see the crash not happening in step 4: + + $ sudo apt install update-manager=1:16.04.15 update-manager- + core=1:16.04.15 python3-update-manager=1:16.04.15 + + + 4. Press "Install Now" on u-m GUI. + The fixed u-m will successfully perform the installation, the unfixed one will fail with: + TypeError: commit() missing 1 required positional argument: 'pkgs_remove' + + [Regression Potential] + + The change to the backend API could cause u-m not able to remove unused + kernels, but in my testing this feature still worked. + + [Original Bug Text] + The Ubuntu Error Tracker has been receiving reports about a problem regarding update-manager. This problem was most recently seen with package version 1:18.04.11, the problem page at https://errors.ubuntu.com/problem/310b9890e139c17b61faeee8f50078909283794e contains more details, including versions of packages affected, stacktrace or traceback, and individual crash reports. If you do not have access to the Ubuntu Error Tracker and are a software developer, you can request it at http://forms.canonical.com/reports/.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1771894 Title: /usr/bin/update- manager:TypeError:<lambda>:on_button_install_clicked:start_install:_start_pane:start:unwind_generator To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/update-manager/+bug/1771894/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
