IPv6 literal source fails to initialize properly

[Mynacol]

(This is all on version 1.3.1 and as far I see, the changes to 1.4.0 don't improve this problem)

I use ntpd-rs for months, on most machines with server sources specified as domain names. But on one server, I prefer to use hard-coded IP addresses. On this setup I'm only able to use IPv4 addresses and not IPv6 addresses. The error is always spamming the logs with the following:

WARN ntpd::daemon::spawn::standard: error while resolving source address, retrying error=Custom { kind: Uncategorized, error: "failed to lookup address information: Name or service not known" }

I tried the following two types of configuration, both lead to the same error (One with port number, one without. IP addresses replaced with the same format):

[observability]
log-level = "warn"
observation-path = "/var/run/ntpd-rs/observe"
observation-permissions = 384

[[source]]
address = "[2001:db8:abc:123::1]:123"
mode = "server"

[[source]]
address = "192.0.2.1"
mode = "server"

[synchronization]
minimum-agreeing-sources = 3

[observability]
log-level = "warn"
observation-path = "/var/run/ntpd-rs/observe"
observation-permissions = 384

[[source]]
address = "2001:db8:abc:123::1"
mode = "server"

[[source]]
address = "192.0.2.1"
mode = "server"

[synchronization]
minimum-agreeing-sources = 3

You seem to be mis-parsing the IPv6 literals as domain names and trying to resolve them with DNS, which obviously fails.

P.S.:
I was looking through the source code and found this line. It is not fully correct, as there are IPv6 addresses with only two :. I know of a public DNS server at 2a09:: that would fail the config. You sould probably change it to >= 2.
https://github.com/pendulum-project/ntpd-rs/blob/v1.4.0/ntpd/src/daemon/config/ntp_source.rs#L261