Disabled all my repositories by commenting out everything in /etc/apt/sources.list and moving everything out of /etc/apt/sources.list.d; it did the trick: could update appstream from proposed repository. Thanks!
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1579712 Title: Refresh hangs due to strdup on non-NULL terminated string To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/appstream/+bug/1579712/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
