upgrade lts

src/Skat/AI/Server.hs

@@ -48,13 +48,18 @@ initServer :: Net.PortNumber -> Buffering -> OnReceive -> IO ServerEnv
 initServer port buffermode handler = do
     sock <- Net.socket Net.AF_INET Net.Stream 0
     Net.setSocketOption sock Net.ReuseAddr 1
-    Net.bind sock (Net.SockAddrInet port Net.iNADDR_ANY)
+    addr <- Net.addrAddress <$> resolve
+    Net.bind sock addr
     Net.listen sock 5
     chan <- newChan
     forkIO $ forever $ do
         msg <- readChan chan -- clearing the main channel
         return ()
     return (ServerEnv buffermode sock chan handler)
+  where resolve = do
+            let hints = Net.defaultHints { Net.addrSocketType = Net.Stream }
+            addrs <- Net.getAddrInfo (Just hints) (Just "127.0.0.1") (Just $ show port)
+            return $ head addrs
 
 close :: ServerEnv -> IO ()
 close = Net.close . socket

stack.yaml

@@ -17,7 +17,7 @@
 #
 # resolver: ./custom-snapshot.yaml
 # resolver: https://example.com/snapshots/2018-01-01.yaml
-resolver: lts-14.3
+resolver: lts-18.18
 
 # User packages to be built.
 # Various formats can be used as shown in the example below.