Starting with systemd 229-4ubuntu17, pointed systemd-resolve to the break-tcp DNS server and observed crash in the journal after calling systemd-resolve start.ubuntu.com.
Upgraded to 229-4ubuntu19, and now systemd-resolve start.ubuntu.com instead of disconnecting and crashing systemd-resolved daemon, keeps the systemd-resolved daemon running and an error is bubbled up back to the clinet received invalid reply.
Starting with systemd 229-4ubuntu17, pointed systemd-resolve to the break-tcp DNS server and observed crash in the journal after calling systemd-resolve start.ubuntu.com.
Upgraded to 229-4ubuntu19, and now systemd-resolve start.ubuntu.com instead of disconnecting and crashing systemd-resolved daemon, keeps the systemd-resolved daemon running and an error is bubbled up back to the clinet received invalid reply.