diff --git a/src/peering/basalt.rs b/src/peering/basalt.rs
index abfe1e4..a53571e 100644
--- a/src/peering/basalt.rs
+++ b/src/peering/basalt.rs
@@ -52,6 +52,7 @@ impl Peer {
 	fn cost(&self, seed: &Seed) -> Cost {
 		let mut hasher = hash::State::new();
 		hasher.update(&seed[..]);
+		let hasher = hasher;
 
 		let mut cost = [0u8; 40];
 		match self.addr {
@@ -59,7 +60,7 @@ impl Peer {
 				let v4ip = v4addr.ip().octets();
 
 				for i in 0..4 {
-					let mut h = hasher.clone();
+					let mut h = hasher;
 					h.update(&v4ip[..i + 1]);
 					cost[i * 8..(i + 1) * 8].copy_from_slice(&h.finalize()[..8]);
 				}
@@ -68,7 +69,7 @@ impl Peer {
 				let v6ip = v6addr.ip().octets();
 
 				for i in 0..4 {
-					let mut h = hasher.clone();
+					let mut h = hasher;
 					h.update(&v6ip[..i + 2]);
 					cost[i * 8..(i + 1) * 8].copy_from_slice(&h.finalize()[..8]);
 				}
@@ -76,7 +77,7 @@ impl Peer {
 		}
 
 		{
-			let mut h5 = hasher.clone();
+			let mut h5 = hasher;
 			h5.update(&format!("{} {}", self.addr, hex::encode(self.id)).into_bytes()[..]);
 			cost[32..40].copy_from_slice(&h5.finalize()[..8]);
 		}
@@ -115,8 +116,7 @@ impl BasaltView {
 	fn current_peers(&self) -> HashSet<Peer> {
 		self.slots
 			.iter()
-			.filter(|s| s.peer.is_some())
-			.map(|s| s.peer.unwrap().clone())
+			.filter_map(|s| s.peer)
 			.collect::<HashSet<_>>()
 	}
 	fn current_peers_vec(&self) -> Vec<Peer> {
@@ -131,7 +131,7 @@ impl BasaltView {
 			.filter(|(_i, s)| s.peer.is_some())
 			.map(|(i, _s)| i)
 			.collect::<Vec<_>>();
-		if possibles.len() == 0 {
+		if possibles.is_empty() {
 			vec![]
 		} else {
 			let mut ret = vec![];
@@ -290,7 +290,7 @@ impl Basalt {
 		let basalt2 = basalt.clone();
 		netapp.add_msg_handler::<PushMessage, _, _>(move |_from: NodeID, push_msg: PushMessage| {
 			basalt2.handle_peer_list(&push_msg.peers[..]);
-			async move { () }
+			async move { }
 		});
 
 		basalt