Thanks @Toad213, that worked. I have version 1.20.1-0ubuntu4 installed and apt is now behaving post-update.
I guess this issue is resolved, or rather replaced by bug #767829 as mentioned above. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/767498 Title: package apport 1.20.1-0ubuntu3 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs