This update causes a regression that is tracked in bug 1780099 - notably the __hash__ of an apt.Package can change after opening, so if used in a set, or as a dict key, the package won't be found anymore. The regression is less worse than the previous state, but will be fixed shortly.
-- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to python-apt in Ubuntu. https://bugs.launchpad.net/bugs/1773316 Title: Object of different cache passed as argument to apt_pkg.DepCache method Status in python-apt package in Ubuntu: Fix Released Status in update-manager package in Ubuntu: Won't Fix Status in python-apt source package in Bionic: Fix Released Status in update-manager source package in Bionic: Won't Fix Status in python-apt source package in Cosmic: Fix Released Status in update-manager source package in Cosmic: Won't Fix Bug description: [Impact] python-apt 1.6 raises an exception when objects of an old cache are passed to a apt_pkg.DepCache methods for a different cache. Prior to that, those would either segfault, succeed, or silently operate on a different object, as they use package/version ids, and e.g. two different packages in the old and new cache might have the same id. With 1.6.1, we introduce a remapping algorithm that remaps objects of apt.Cache() when calling apt.Cache.open(), allowing old objects to be used after reopening, as long as they exist in the new cache. If they don't exist in the new cache, apt_pkg.CacheMismatchError will be raised from the apt_pkg layer. [Test case] import apt c=apt.Cache() p=c["apt"] c.open() p.mark_install() [Regression potential] Could be remapping to wrong items which would cause us to install a wrong version, for example. Compared to pre-bionic, bionic is a regression already, though, and any regression caused here is less important than what we have now. [Original bug report] 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/e6ff7b5c385c512b7933497ad895c8a19ed063b2 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/. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/python-apt/+bug/1773316/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
