** Description changed: + [impact] + + trusty dpkg fails when trying to extract a dpkg source package + compressed using xz. This breaks running autopkgtest from bionic with + any and all trusty packages. + + [test case] + + on a bionic system, get any trusty source dpkg and run autopkgtest with + it. See comment 11 for an example. + + [regression potential] + + any changes to dpkg has the potential to break all package changes on + the system, which obviously is a serious regression. However, this + specific change has been upstream for a very long time. Any breakage + would happen when dpkg is either building or extracting a deb. + + [other info] + + this affects debootstrap as well, as described in the original bug + description: + + --- + trusty's dpkg (1.17.5ubuntu5.7) cannot handle .deb files that contain control.tar files that are compressed using the xz compressor. Here's an example of such a case when trying to show the contents of a .deb file from bionic's repositories: dpkg-deb: error: archive './var/cache/apt/archives/ubuntu- minimal_1.406_amd64.deb' has premature member 'control.tar.xz' before 'control.tar.gz', giving up This issue makes it currently impossible to create a bionic environment using debootstrap (currently from trusty-proposed). - I have observed the issue on trusty, precisely on $ lsb_release -rd Description: Ubuntu 14.04.5 LTS Release: 14.04 using $ apt-cache policy dpkg dpkg: - Installed: 1.17.5ubuntu5.7 - Candidate: 1.17.5ubuntu5.7 - Version table: - *** 1.17.5ubuntu5.7 0 - 500 mirror://mirrors.ubuntu.com/mirrors.txt/ trusty-updates/main amd64 Packages - 100 /var/lib/dpkg/status - 1.17.5ubuntu5.6 0 - 500 http://security.ubuntu.com/ubuntu/ trusty-security/main amd64 Packages - 1.17.5ubuntu5 0 - 500 mirror://mirrors.ubuntu.com/mirrors.txt/ trusty/main amd64 Packages + Installed: 1.17.5ubuntu5.7 + Candidate: 1.17.5ubuntu5.7 + Version table: + *** 1.17.5ubuntu5.7 0 + 500 mirror://mirrors.ubuntu.com/mirrors.txt/ trusty-updates/main amd64 Packages + 100 /var/lib/dpkg/status + 1.17.5ubuntu5.6 0 + 500 http://security.ubuntu.com/ubuntu/ trusty-security/main amd64 Packages + 1.17.5ubuntu5 0 + 500 mirror://mirrors.ubuntu.com/mirrors.txt/ trusty/main amd64 Packages
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1730627 Title: xz compressed control.tar files not supported To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/dpkg/+bug/1730627/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
