diff --git a/crates/ptth_multi_call_server/src/download.rs b/crates/ptth_multi_call_server/src/download.rs
index 364b26c..01ada62 100644
--- a/crates/ptth_multi_call_server/src/download.rs
+++ b/crates/ptth_multi_call_server/src/download.rs
@@ -26,7 +26,6 @@ use sha2::{
 use tokio::{
 	sync::mpsc,
 	task::{
-		spawn,
 		spawn_blocking,
 	},
 };
@@ -35,7 +34,7 @@ pub async fn main (args: &[OsString]) -> anyhow::Result <()> {
 	let mut url = None;
 	let mut expected_sha512 = None;
 	
-	let mut args = args [1..].into_iter ();
+	let mut args = args [1..].iter ();
 	
 	loop {
 		let arg = match args.next () {
@@ -79,7 +78,7 @@ pub async fn main (args: &[OsString]) -> anyhow::Result <()> {
 	let mut resp_stream = resp.bytes_stream ();
 	
 	// The hasher is owned by a task because it makes ownership simpler
-	let (mut hash_tx, mut hash_rx) = mpsc::channel (1);
+	let (hash_tx, mut hash_rx) = mpsc::channel (1);
 	
 	let hasher_task = spawn_blocking (move || {
 		let mut hasher = Sha512::new ();
diff --git a/crates/ptth_multi_call_server/src/main.rs b/crates/ptth_multi_call_server/src/main.rs
index 1757884..57514f2 100644
--- a/crates/ptth_multi_call_server/src/main.rs
+++ b/crates/ptth_multi_call_server/src/main.rs
@@ -29,10 +29,13 @@ async fn main () -> anyhow::Result <()> {
 	
 	let (subcommand, args) = parse_args (&args)?;
 	match subcommand {
-		Diceware => Ok (diceware::main ()),
-		Download => download::main (&args).await,
-		PtthServer => ptth_server::executable::main (&args).await,
-		PtthFileServer => ptth_file_server::main (&args).await,
+		Diceware => {
+			diceware::main ();
+			Ok (())
+		},
+		Download => download::main (args).await,
+		PtthServer => ptth_server::executable::main (args).await,
+		PtthFileServer => ptth_file_server::main (args).await,
 		PtthQuicEndServer => {
 			let (shutdown_tx, shutdown_rx) = watch::channel (false);
 			
@@ -40,11 +43,11 @@ async fn main () -> anyhow::Result <()> {
 				shutdown_tx.send (true).expect ("Couldn't forward Ctrl+C signal");
 			})?;
 			tracing::trace! ("Set Ctrl+C handler");
-			quic_demo::executable_end_server::main (&args, Some (shutdown_rx)).await?;
+			quic_demo::executable_end_server::main (args, Some (shutdown_rx)).await?;
 			
 			Ok (())
 		}
-		Ulid => ulid::main (&args).await,
+		Ulid => ulid::main (args).await,
 	}
 }
 
diff --git a/crates/ptth_multi_call_server/src/ulid.rs b/crates/ptth_multi_call_server/src/ulid.rs
index d22a7a7..9c9eb0f 100644
--- a/crates/ptth_multi_call_server/src/ulid.rs
+++ b/crates/ptth_multi_call_server/src/ulid.rs
@@ -4,7 +4,7 @@ use std::{
 
 use anyhow::Result;
 
-pub async fn main (args: &[OsString]) -> Result <()> 
+pub async fn main (_args: &[OsString]) -> Result <()> 
 {
 	println! ("{}", rusty_ulid::generate_ulid_string ());
 	
diff --git a/crates/ptth_server_gui/src/main.rs b/crates/ptth_server_gui/src/main.rs
index 41c1b3b..a990c7e 100644
--- a/crates/ptth_server_gui/src/main.rs
+++ b/crates/ptth_server_gui/src/main.rs
@@ -58,11 +58,11 @@ fn main ()
 	
 	let (hit_tx, mut hit_rx) = mpsc::channel (1);
 	{
-		let fltk_tx = fltk_tx.clone ();
+		let fltk_tx = fltk_tx;
 		
 		rt.spawn (async move {
 			eprintln! ("Entering channel task");
-			while let Some (_) = hit_rx.recv ().await {
+			while hit_rx.recv ().await.is_some () {
 				eprintln! ("fltk_tx");
 				fltk_tx.send (Message::Hit);
 			}
diff --git a/prototypes/ptth_quic_client_gui/src/main.rs b/prototypes/ptth_quic_client_gui/src/main.rs
index 13c23f7..b75907f 100644
--- a/prototypes/ptth_quic_client_gui/src/main.rs
+++ b/prototypes/ptth_quic_client_gui/src/main.rs
@@ -96,7 +96,7 @@ impl GuiClient <'_> {
 		port_idx: usize,
 	) -> anyhow::Result <()>
 	{
-		self.ports [port_idx].open_port (&self.rt, connection_p2_p3)?;
+		self.ports [port_idx].open_port (self.rt, connection_p2_p3)?;
 		self.sync_status ();
 		
 		Ok (())
@@ -142,9 +142,9 @@ impl GuiClient <'_> {
 			return;
 		}
 		
-		let mut gui = GuiPort::new (fltk_tx, self.ports.len ());
+		let gui = GuiPort::new (fltk_tx, self.ports.len ());
 		ports_col.add (&gui.row);
-		ports_col.set_size (&mut gui.row, 30);
+		ports_col.set_size (&gui.row, 30);
 		
 		let port = Port {
 			gui,
@@ -175,21 +175,21 @@ fn main () -> anyhow::Result <()> {
 	
 	let mut col = Flex::default ().column ().size_of_parent ();
 	
-	let mut frame_status = Frame::default ();
-	col.set_size (&mut frame_status, 30);
+	let frame_status = Frame::default ();
+	col.set_size (&frame_status, 30);
 	
 	{
 		let mut row = Flex::default ().row ();
 		
-		let mut l = Frame::default ().with_label ("Server ID");
-		row.set_size (&mut l, 120);
-		let mut l = Frame::default ().with_label ("Server port");
-		row.set_size (&mut l, 80);
-		let mut l = Frame::default ().with_label ("Local port");
-		row.set_size (&mut l, 80);
+		let l = Frame::default ().with_label ("Server ID");
+		row.set_size (&l, 120);
+		let l = Frame::default ().with_label ("Server port");
+		row.set_size (&l, 80);
+		let l = Frame::default ().with_label ("Local port");
+		row.set_size (&l, 80);
 		row.end ();
 		
-		col.set_size (&mut row, 30);
+		col.set_size (&row, 30);
 	}
 	
 	let mut ports_col = Flex::default ().column ();
@@ -198,7 +198,7 @@ fn main () -> anyhow::Result <()> {
 	let mut but_add_port = Button::default ().with_label ("+");
 	but_add_port.set_trigger (CallbackTrigger::Release);
 	but_add_port.emit (fltk_tx, Message::AddPort);
-	col.set_size (&mut but_add_port, 30);
+	col.set_size (&but_add_port, 30);
 	
 	col.end ();
 	
@@ -286,11 +286,11 @@ impl GuiPort {
 		let mut but_open = Button::default ().with_label ("Open");
 		let mut but_close = Button::default ().with_label ("Close");
 		
-		row.set_size (&mut input_server_id, 120);
-		row.set_size (&mut input_server_port, 80);
-		row.set_size (&mut input_client_port, 80);
-		row.set_size (&mut but_open, 80);
-		row.set_size (&mut but_close, 80);
+		row.set_size (&input_server_id, 120);
+		row.set_size (&input_server_port, 80);
+		row.set_size (&input_client_port, 80);
+		row.set_size (&but_open, 80);
+		row.set_size (&but_close, 80);
 		
 		input_client_port.set_value ("");
 		input_client_port.set_readonly (true);
@@ -389,7 +389,7 @@ mod test {
 		let port = rng.gen_range (tcp_eph_range);
 		assert_eq! (port, 49408);
 		
-		for (input, expected) in vec! [
+		for (input, expected) in [
 			(("127.0.0.1:4000",  "bogus_server",   22), 51168),
 			// The relay address is explicitly excluded from the eph port
 			// computation in case I want to support connecting to a server
diff --git a/src/main.rs b/src/main.rs
index 3ba8f4d..ab4b7a2 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -99,7 +99,7 @@ async fn main () -> anyhow::Result <()> {
 	let resp = client.get (&format! ("{}/frontend/servers/{}/files/COPYING", relay_url, server_name))
 	.send ().await.expect ("Couldn't find license").bytes ().await.expect ("Couldn't find license");
 	
-	if blake3::hash (&resp) != blake3::Hash::from ([
+	if blake3::hash (&resp) != [
 		0xca, 0x02, 0x92, 0x78,
 		0x9c, 0x0a, 0x0e, 0xcb,
 		0xa7, 0x06, 0xf4, 0xb3,
@@ -109,7 +109,7 @@ async fn main () -> anyhow::Result <()> {
 		0xc1, 0xd4, 0x32, 0xc5,
 		0x2c, 0x4a, 0xac, 0x1f,
 		0x1a, 0xbb, 0xa8, 0xef,
-	]) {
+	] {
 		panic! ("{}", String::from_utf8 (resp.to_vec ()).expect ("???"));
 	}
 	
diff --git a/src/tests.rs b/src/tests.rs
index 903b845..3e83306 100644
--- a/src/tests.rs
+++ b/src/tests.rs
@@ -45,7 +45,7 @@ async fn testing_client_checks (
 	.send ();
 	let resp = tokio::time::timeout (Duration::from_secs (2), req).await.expect ("Request timed out").expect ("Couldn't find license").bytes ().await.expect ("Couldn't find license");
 	
-	if blake3::hash (&resp) != blake3::Hash::from ([
+	if blake3::hash (&resp) != [
 		0xca, 0x02, 0x92, 0x78,
 		0x9c, 0x0a, 0x0e, 0xcb,
 		0xa7, 0x06, 0xf4, 0xb3,
@@ -55,7 +55,7 @@ async fn testing_client_checks (
 		0xc1, 0xd4, 0x32, 0xc5,
 		0x2c, 0x4a, 0xac, 0x1f,
 		0x1a, 0xbb, 0xa8, 0xef,
-	]) {
+	] {
 		panic! ("{}", String::from_utf8 (resp.to_vec ()).expect ("???"));
 	}