diff -r a077aac9df01 -r 98ef2913ec73 rust/hedgewars-server/src/server/core.rs
--- a/rust/hedgewars-server/src/server/core.rs	Sun Dec 16 00:09:20 2018 +0100
+++ b/rust/hedgewars-server/src/server/core.rs	Sun Dec 16 00:12:29 2018 +0100
@@ -1,15 +1,18 @@
-use slab;
-use crate::utils;
 use super::{
+    actions,
+    actions::{Destination, PendingMessage},
+    client::HWClient,
+    coretypes::{ClientId, RoomId},
+    handlers,
     io::HWServerIO,
-    client::HWClient, room::HWRoom, actions, handlers,
-    coretypes::{ClientId, RoomId},
-    actions::{Destination, PendingMessage}
+    room::HWRoom,
 };
 use crate::protocol::messages::*;
-use rand::{RngCore, thread_rng};
-use base64::{encode};
+use crate::utils;
+use base64::encode;
 use log::*;
+use rand::{thread_rng, RngCore};
+use slab;
 
 type Slab<T> = slab::Slab<T>;
 
@@ -19,7 +22,7 @@
     pub lobby_id: RoomId,
     pub output: Vec<(Vec<ClientId>, HWServerMessage)>,
     pub removed_clients: Vec<ClientId>,
-    pub io: Box<dyn HWServerIO>
+    pub io: Box<dyn HWServerIO>,
 }
 
 impl HWServer {
@@ -27,11 +30,12 @@
         let rooms = Slab::with_capacity(rooms_limit);
         let clients = Slab::with_capacity(clients_limit);
         let mut server = HWServer {
-            clients, rooms,
+            clients,
+            rooms,
             lobby_id: 0,
             output: vec![],
             removed_clients: vec![],
-            io
+            io,
         };
         server.lobby_id = server.add_room();
         server
@@ -48,13 +52,20 @@
             let client = HWClient::new(entry.key(), encode(&salt));
             entry.insert(client);
         }
-        self.send(key, &Destination::ToSelf, HWServerMessage::Connected(utils::PROTOCOL_VERSION));
+        self.send(
+            key,
+            &Destination::ToSelf,
+            HWServerMessage::Connected(utils::PROTOCOL_VERSION),
+        );
         key
     }
 
     pub fn client_lost(&mut self, client_id: ClientId) {
-        actions::run_action(self, client_id,
-                            actions::Action::ByeClient("Connection reset".to_string()));
+        actions::run_action(
+            self,
+            client_id,
+            actions::Action::ByeClient("Connection reset".to_string()),
+        );
     }
 
     pub fn add_room(&mut self) -> RoomId {
@@ -76,14 +87,19 @@
         let mut ids = match *destination {
             Destination::ToSelf => vec![client_id],
             Destination::ToId(id) => vec![id],
-            Destination::ToAll {room_id: Some(id), ..} =>
-                self.room_clients(id),
-            Destination::ToAll {protocol: Some(proto), ..} =>
-                self.protocol_clients(proto),
-            Destination::ToAll {..} =>
-                self.clients.iter().map(|(id, _)| id).collect::<Vec<_>>()
+            Destination::ToAll {
+                room_id: Some(id), ..
+            } => self.room_clients(id),
+            Destination::ToAll {
+                protocol: Some(proto),
+                ..
+            } => self.protocol_clients(proto),
+            Destination::ToAll { .. } => self.clients.iter().map(|(id, _)| id).collect::<Vec<_>>(),
         };
-        if let Destination::ToAll {skip_self: true, ..} = destination {
+        if let Destination::ToAll {
+            skip_self: true, ..
+        } = destination
+        {
             if let Some(index) = ids.iter().position(|id| *id == client_id) {
                 ids.remove(index);
             }
@@ -91,7 +107,12 @@
         ids
     }
 
-    pub fn send(&mut self, client_id: ClientId, destination: &Destination, message: HWServerMessage) {
+    pub fn send(
+        &mut self,
+        client_id: ClientId,
+        destination: &Destination,
+        message: HWServerMessage,
+    ) {
         let ids = self.get_recipients(client_id, &destination);
         self.output.push((ids, message));
     }
@@ -102,32 +123,43 @@
         }
     }
 
-    pub fn lobby(&self) -> &HWRoom { &self.rooms[self.lobby_id] }
+    pub fn lobby(&self) -> &HWRoom {
+        &self.rooms[self.lobby_id]
+    }
 
     pub fn has_room(&self, name: &str) -> bool {
         self.rooms.iter().any(|(_, r)| r.name == name)
     }
 
     pub fn find_room(&self, name: &str) -> Option<&HWRoom> {
-        self.rooms.iter().find_map(|(_, r)| Some(r).filter(|r| r.name == name))
+        self.rooms
+            .iter()
+            .find_map(|(_, r)| Some(r).filter(|r| r.name == name))
     }
 
     pub fn find_room_mut(&mut self, name: &str) -> Option<&mut HWRoom> {
-        self.rooms.iter_mut().find_map(|(_, r)| Some(r).filter(|r| r.name == name))
+        self.rooms
+            .iter_mut()
+            .find_map(|(_, r)| Some(r).filter(|r| r.name == name))
     }
 
     pub fn find_client(&self, nick: &str) -> Option<&HWClient> {
-        self.clients.iter().find_map(|(_, c)| Some(c).filter(|c| c.nick == nick))
+        self.clients
+            .iter()
+            .find_map(|(_, c)| Some(c).filter(|c| c.nick == nick))
     }
 
     pub fn find_client_mut(&mut self, nick: &str) -> Option<&mut HWClient> {
-        self.clients.iter_mut().find_map(|(_, c)| Some(c).filter(|c| c.nick == nick))
+        self.clients
+            .iter_mut()
+            .find_map(|(_, c)| Some(c).filter(|c| c.nick == nick))
     }
 
     pub fn select_clients<F>(&self, f: F) -> Vec<ClientId>
-        where F: Fn(&(usize, &HWClient)) -> bool {
-        self.clients.iter().filter(f)
-            .map(|(_, c)| c.id).collect()
+    where
+        F: Fn(&(usize, &HWClient)) -> bool,
+    {
+        self.clients.iter().filter(f).map(|(_, c)| c.id).collect()
     }
 
     pub fn room_clients(&self, room_id: RoomId) -> Vec<ClientId> {
@@ -140,7 +172,7 @@
 
     pub fn other_clients_in_room(&self, self_id: ClientId) -> Vec<ClientId> {
         let room_id = self.clients[self_id].room_id;
-        self.select_clients(|(id, c)| *id != self_id && c.room_id == room_id )
+        self.select_clients(|(id, c)| *id != self_id && c.room_id == room_id)
     }
 
     pub fn client_and_room(&mut self, client_id: ClientId) -> (&mut HWClient, Option<&mut HWRoom>) {