actually fix all let_underscore_must_use lints

CI caught some more

Signed-off-by: strawberry <strawberry@puppygock.gay>

src/service/globals/mod.rs

@@ -79,11 +79,13 @@ impl RotationHandler {
 
 	pub fn watch(&self) -> impl Future<Output = ()> {
 		let mut r = self.0.subscribe();
+		#[allow(clippy::let_underscore_must_use)]
 		async move {
 			_ = r.recv().await;
 		}
 	}
 
+	#[allow(clippy::let_underscore_must_use)]
 	pub fn fire(&self) { _ = self.0.send(()); }
 }
 

src/service/rooms/event_handler/signing_keys.rs

@@ -271,17 +271,20 @@ impl super::Service {
 		{
 			let mut pkm = pub_key_map.write().await;
 
-			// Try to fetch keys, failure is okay
-			// Servers we couldn't find in the cache will be added to `servers`
-			for pdu in &event.room_state.state {
-				_ = self
+			// Try to fetch keys, failure is okay. Servers we couldn't find in the cache
+			// will be added to `servers`
+			for pdu in event
+				.room_state
+				.state
+				.iter()
+				.chain(&event.room_state.auth_chain)
+			{
+				if let Err(error) = self
 					.get_server_keys_from_cache(pdu, &mut servers, room_version, &mut pkm)
-					.await;
-			}
-			for pdu in &event.room_state.auth_chain {
-				_ = self
-					.get_server_keys_from_cache(pdu, &mut servers, room_version, &mut pkm)
-					.await;
+					.await
+				{
+					debug!(%error, "failed to get server keys from cache");
+				};
 			}
 
 			drop(pkm);

src/service/rooms/typing/mod.rs

@@ -6,6 +6,7 @@ use ruma::{
 	OwnedRoomId, OwnedUserId, RoomId, UserId,
 };
 use tokio::sync::{broadcast, RwLock};
+use tracing::trace;
 
 use crate::{
 	debug_info, services, user_is_local,
@@ -37,7 +38,9 @@ impl Service {
 			.write()
 			.await
 			.insert(room_id.to_owned(), services().globals.next_count()?);
-		_ = self.typing_update_sender.send(room_id.to_owned());
+		if self.typing_update_sender.send(room_id.to_owned()).is_err() {
+			trace!("receiver found what it was looking for and is no longer interested");
+		}
 
 		// update federation
 		if user_is_local(user_id) {
@@ -61,7 +64,9 @@ impl Service {
 			.write()
 			.await
 			.insert(room_id.to_owned(), services().globals.next_count()?);
-		_ = self.typing_update_sender.send(room_id.to_owned());
+		if self.typing_update_sender.send(room_id.to_owned()).is_err() {
+			trace!("receiver found what it was looking for and is no longer interested");
+		}
 
 		// update federation
 		if user_is_local(user_id) {
@@ -114,7 +119,9 @@ impl Service {
 				.write()
 				.await
 				.insert(room_id.to_owned(), services().globals.next_count()?);
-			_ = self.typing_update_sender.send(room_id.to_owned());
+			if self.typing_update_sender.send(room_id.to_owned()).is_err() {
+				trace!("receiver found what it was looking for and is no longer interested");
+			}
 
 			// update federation
 			for user in removable {

src/service/services.rs

@@ -10,7 +10,7 @@ use tokio::{
 	fs,
 	sync::{broadcast, Mutex, RwLock},
 };
-use tracing::{debug, info, trace};
+use tracing::{debug, info, trace, warn};
 
 use crate::{
 	account_data, admin, appservice, globals, key_backups, media, presence, pusher, rooms, sending, transaction_ids,
@@ -293,7 +293,11 @@ bad_signature_ratelimiter: {bad_signature_ratelimiter}
 
 		if self.globals.allow_check_for_updates() {
 			let handle = globals::updates::start_check_for_updates_task().await?;
-			_ = self.globals.updates_handle.lock().await.insert(handle);
+
+			#[allow(clippy::let_underscore_must_use)] // needed for shutdown
+			{
+				_ = self.globals.updates_handle.lock().await.insert(handle);
+			}
 		}
 
 		debug_info!("Services startup complete.");
@@ -319,13 +323,19 @@ bad_signature_ratelimiter: {bad_signature_ratelimiter}
 
 		debug!("Removing unix socket file.");
 		if let Some(path) = self.globals.unix_socket_path().as_ref() {
-			_ = fs::remove_file(path).await;
+			if let Err(e) = fs::remove_file(path).await {
+				warn!("Failed to remove UNIX socket file: {e}");
+			}
 		}
 
 		debug!("Waiting for update worker...");
 		if let Some(updates_handle) = self.globals.updates_handle.lock().await.take() {
 			updates_handle.abort();
-			_ = updates_handle.await;
+
+			#[allow(clippy::let_underscore_must_use)]
+			{
+				_ = updates_handle.await;
+			}
 		}
 
 		debug!("Waiting for admin worker...");