update-manager-core does not list dependency on apport package

[Jason Rogers]

This problem occurred while I was using a minimal installation of Ubuntu 12.04 LTS (64-bit), installed from the Minimal ISO and updated as of about 30 minutes before this report was filed. I was using the latest update-manager-core package that is available in 12.04, which I believe is version 1:0.156.14.5 (I no longer have it on my system, as I managed to upgrade before reporting this bug).

What happened: After installing the above version of update-manager-core, setting the "Prompt" variable to "normal" in /etc/update-manager/release-upgrades, and attempting to upgrade to 12.10 (using "sudo do-release-upgrade -d"), the upgrade process unexpectedly crashed with a Python ImportError. The traceback said that it could not locate the module apport.hookutils. I would have expected that apport would have been installed as a dependency of update-manager-core, given that update-manager-core requires that apport modules be present on the system. So, I think that apport needs to be added as a dependency for update-manager-core. Once I manually installed the apport package, the upgrade process worked just fine.