if we use ipv6_cidr_to_range function with nullable func which with
invalid ipv6 will make be core
```
mysql> select id, ipv6_cidr_to_range(nullable(''), 32) from fn_test_ip_nullable order by id;
```
if we use ipv6_cidr_to_range function with nullable func which with
invalid ipv6 will make be core
```
mysql> select id, ipv6_cidr_to_range(nullable(''), 32) from fn_test_ip_nullable order by id;
```