netcat fails with an error with -v

[ov2k]

In a fresh install of Ubuntu Server 20.04.1, netcat -vlp 8000 fails with the following error message:

netcat: getnameinfo: Temporary failure in name resolution

Name resolution, both forwards and backwards, works as expected elsewhere (e.g., ping or nslookup).

There's an upstream Debian patch that changes getnameinfo() errors into warnings that should suffice. I'm not sure whether the underlying getnameinfo() error is inherited as well, but neither Debian Buster or Sid have such an error, nor does Ubuntu Server 18.04.5.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Heinrich Schuchardt (xypron)]

In netcat-openbsd 1.218-3ubuntu1 used by Ubuntu Jammy the message is only a warning and only written if providing the -v argument.