named-checkconf should report missing dnstap-output option when dnstap option is set

Description

named-checkconf reports no errors, but named will not start.

The option "dnstap" requires "dnstap-output" to also be present, but named-checkconf does not discover/report the unloadable configuration.

named-checkconf; echo $?

0

named -g 2>&1 | tail -4

09-Jul-2019 16:05:14.735 automatic empty zone: HOME.ARPA

09-Jul-2019 16:05:14.735 'dnstap-output' must be set if 'dnstap' is set: not found

09-Jul-2019 16:05:14.735 loading configuration: not found

09-Jul-2019 16:05:14.735 exiting (due to fatal error)

Request

An rndc-checkconf error message.

Links / references

BIND 9.14.3

Config:

named-checkconf -p

options {

directory "/etc/namedb";

dnstap { client; auth; };

recursion yes;

};