If you don't want to enable the "proposed" repository, here's a quick way to install the fixed sudo:
sudo -i # <---- this helps work around the bug in the current version of sudo wget -c -t 0 'https://launchpad.net/ubuntu/+source/sudo/1.8.3p1-1ubuntu3.1/+build/3453511/+files/sudo_1.8.3p1-1ubuntu3.1_amd64.deb' dpkg -i sudo_1.8.3p1-1ubuntu3.1_amd64.deb -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/927828 Title: sudo: pam_mount.c:417: modify_pm_count: Assertion `user != ((void *)0)' failed. To manage notifications about this bug go to: https://bugs.launchpad.net/sudo/+bug/927828/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs