Downgrading 'mount' to 2.17.2-9.1ubuntu4 fixes the issue, so reassigning to util-linux.
** Package changed: debootstrap (Ubuntu) => util-linux (Ubuntu) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/805886 Title: /proc does not get umounted after debootstrap To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/util-linux/+bug/805886/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs