click has the right dependencies here (click Depends: python3-click Depends: python3-apt Depends: libapt-pkg4.16). The problem is that unity-scope-click.prerm (the relevant bit of which is in fact generated by dh_click, so this isn't passing the buck) is calling click in a situation where click may be technically in an unconfigured state: in particular this is probably mid-way through upgrading the packages that form part of the g++ 5 transition between 15.04 and 15.10, so libapt-pkg and python-apt are temporarily in a rather sad state.
I don't think that strengthening dependencies is the answer here; instead, we need to make things more robust against being run in this kind of situation. The good news is that apt_pkg is only used in a few places in click, and they almost all tolerate it not being importable. The one exception is click.install, which originally imported apt_pkg because it used it to parse framework entries in manifests. That has since moved to click.framework, though, and the code there now copes with this situation. It therefore looks as though we can just drop the apt_pkg bits from click.install and all will be well. -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to click in Ubuntu. https://bugs.launchpad.net/bugs/1510015 Title: Updating Ubuntu package libunity-scopes1.0 1.0.2+15.10.20150921-0ubuntu1 failed to install/upgrade: subprocess installed pre-removal script returned error exit status 1 Status in click package in Ubuntu: Confirmed Status in unity-scopes-api package in Ubuntu: Confirmed Bug description: Upgrading Ubuntu ProblemType: Package DistroRelease: Ubuntu 15.10 Package: libunity-scopes1.0 1.0.2+15.10.20150921-0ubuntu1 ProcVersionSignature: Ubuntu 4.2.0-16.19-generic 4.2.3 Uname: Linux 4.2.0-16-generic x86_64 ApportVersion: 2.19.1-0ubuntu3 Architecture: amd64 Date: Mon Oct 26 19:24:58 2015 DuplicateSignature: package:libunity-scopes1.0:1.0.2+15.10.20150921-0ubuntu1:subprocess installed pre-removal script returned error exit status 1 ErrorMessage: subprocess installed pre-removal script returned error exit status 1 InstallationDate: Installed on 2015-05-31 (148 days ago) InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422) RelatedPackageVersions: dpkg 1.18.2ubuntu5 apt 1.0.10.2ubuntu1 SourcePackage: unity-scopes-api Title: package libunity-scopes1.0 1.0.2+15.10.20150921-0ubuntu1 failed to install/upgrade: subprocess installed pre-removal script returned error exit status 1 UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/click/+bug/1510015/+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
