hhvm only looks up first dns

HHVM Version

HipHop VM 3.20.2 (rel)
Compiler: tags/HHVM-3.20.2-0-gad133f299ece0e45db8536473a8ef77cc4612ae3
Repo schema: 962ff68f0831a12b292f0eb9acd17f705a904446

Standalone code, or other way to reproduce the problem

### /etc/resolv.conf
nameserver 8.8.8.8
nameserver 127.0.0.1

echo gethostbyname("mylocaldomain");

Expected result

## local ip or whatever
127.0.0.1

Actual result

mylocaldomain

If I use

### /etc/resolv.conf
nameserver 127.0.0.1
nameserver 8.8.8.8

It works on hhvm.

Testing on PHP 7.1.5 domain is resolved eitherway