Note that stubby has the same bug: % stubby @2001:4b98:dc2:43:216:3eff:fea9:41a -L -z 127.0.0.1:8053 Could not convert "2001:4b98:dc2:43:216:3eff:fea9:41a" to an IP dict: A helper function was supposed to return a certain type for an item, but the wrong type was given. Could not convert "127.0.0.1:8053" to an IP dict: A helper function was supposed to return a certain type for an item, but the wrong type was given.
Again, no problem is I use upstream code (from the git repos): % src/tools/stubby @2001:4b98:dc2:43:216:3eff:fea9:41a -L -z 127.0.0.1:8053 (and then it works)
