BASIC01 does not find parent domain when testing an .arpa-domain #1280
Description
When starting a normal test with the .arpa-domain
0.0.9.0.0.0.7.0.1.0.0.2.ip6.arpa
the test fails in BASIC01 with B01_NO_CHILD even though it is a sone
(https://zonemaster.se/en/result/d308120abac1f3de)
$ dig soa 0.0.9.0.0.0.7.0.1.0.0.2.ip6.arpa
...
;; ANSWER SECTION:
0.0.9.0.0.0.7.0.1.0.0.2.ip6.arpa. 206 IN SOA ns.nta.no. root.nta.no. 2023081801 28800 7200 1209600 86400
The same error (B01_NO_CHILD) happens when testing the parent zone
0.0.7.0.1.0.0.2.ip6.arpa
(https://zonemaster.se/en/result/0e98155738848971)
$ dig soa 0.0.7.0.1.0.0.2.ip6.arpa
...
;; ANSWER SECTION:
0.0.7.0.1.0.0.2.ip6.arpa. 2001 IN SOA ns.uninett.no. hostmaster.uninett.no. 2023082303 36000 3600 1814400 900
But it works when testing the parent of the parent!
7.0.1.0.0.2.ip6.arpa
(https://zonemaster.se/en/result/42f9f0f035fa5f16)
$ dig soa 7.0.1.0.0.2.ip6.arpa
...
;; ANSWER SECTION:
7.0.1.0.0.2.ip6.arpa. 1044 IN SOA pri.authdns.ripe.net. dns.ripe.net. 1692256305 3600 600 864000 3600