I don't know, it's what the upstream author added: https://github.com/jeroennijhof/pam_script/blob/master/debian/script
Probably because of this Debian bug: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=670182 ** Bug watch added: Debian Bug tracker #670182 http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=670182 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1325240 Title: Lockscreen bypass with empty or wrong password To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/libpam-script/+bug/1325240/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
