Default DNS / IP Mapper not working?

[ignoramous]

I'm trying to upgrade the library to the latest version available to see if the leak is resolved but I run into the following issue when a DNS request is made:

ipmap.go:369: W ipmap: Add: err resolving 1dot1dot1dot1.cloudflare-dns.com: lookup 1dot1dot1dot1.cloudflare-dns.com on localhost: no resolver
ipmap.go:213: W ipmap: Get: zero ips for 1dot1dot1dot1.cloudflare-dns.com:853
dot.go:300: W dot: (Preferred) no proxy for 1dot1dot1dot1.cloudflare-dns.com:853; choosing Base among [Base]
ipmap.go:369: W ipmap: Add: err resolving 1dot1dot1dot1.cloudflare-dns.com: lookup 1dot1dot1dot1.cloudflare-dns.com on localhost: no resolver
ipmap.go:213: W ipmap: Get: zero ips for 1dot1dot1dot1.cloudflare-dns.com
ipmap.go:369: W ipmap: Add: err resolving 1dot1dot1dot1.cloudflare-dns.com: lookup 1dot1dot1dot1.cloudflare-dns.com on localhost: no resolver
ipmap.go:203: W ipmap: Add: zero ips for 1dot1dot1dot1.cloudflare-dns.com
dot.go:188: W dot: tlsdial: (Preferred) nil conn/err for 1dot1dot1dot1.cloudflare-dns.com:853, ech? false; err? unknown network no ips
dot.go:326: W dot: ans? ;; opcode: QUERY, status: SERVFAIL, id: 49375
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;clients4.google.com.	IN	 A
 err(unknown network no ips) / ans(0)
cacher.go:370: W cache: barrier: hangover(k: clients4.google.com:1); discard ans (has? true)

My implementation is the same as before with ee0a5ac. Can I find an example anywhere to compare what I'm supposed to change to use a DoT/DoH server now?
Thank you

Originally posted by @paillardf in #123 (comment)

[paillardf]

DoT and DoH now need ip address now to work properly. It was not the case with previous version. I don't know if it's an issue but it definitely a behavior change.

[ignoramous]

Thanks. Yeah, this is quite a severe bug. Will fix it soon.

[ignoramous]

# offending logs
01-22 15:40:21.654 10882 14166 I GoLog   : doh.go:156: I doh: disabling tls verification for http://flyto.rethinkdns.com/rec
01-22 15:40:21.654 10882 14173 E GoLog   : doh.go:266: W doh: ech(flyto.rethinkdns.com): lookup Lookup on localhost: no resolver

IPMapper's (used by bootstrap) dnsx.Resolver reference has become nil. This obviously shouldn't happen unless the Tunnel is Disconnected.

[ignoramous]

Fixed in tip. Please do verify.

You can also now leave the DefaultDNS nil (in intra.Connect), and firestack will use network/OS provided DNS (this will not work if intra.Loopback is set to true, which is false by default).