Discard Result<> from spawn whenever a JoinHandle isn't required

src/fsevent.rs

@@ -457,7 +457,7 @@ impl FsEventWatcher {
                     fs::FSEventStreamInvalidate(stream);
                     fs::FSEventStreamRelease(stream);
                 }
-            });
+            })?;
         // block until runloop has been sent
         self.runloop = Some((rl_rx.recv().unwrap().0, thread_handle));
 

src/inotify.rs

@@ -128,7 +128,7 @@ impl EventLoop {
 
     // Run the event loop.
     pub fn run(self) {
-        thread::Builder::new()
+        let _ = thread::Builder::new()
             .name("notify-rs inotify".to_string())
             .spawn(|| self.event_loop_thread());
     }
@@ -420,7 +420,7 @@ impl EventLoop {
                             let event_loop_tx = self.event_loop_tx.clone();
                             let waker = self.event_loop_waker.clone();
                             let cookie = rename_event.tracker().unwrap(); // unwrap is safe because rename_event is always set with some cookie
-                            thread::Builder::new()
+                            let _ = thread::Builder::new()
                                 .name("notify-rs inotify rename".to_string())
                                 .spawn(move || {
                                     thread::sleep(Duration::from_millis(10)); // wait up to 10 ms for a subsequent event

src/kqueue.rs

@@ -76,7 +76,7 @@ impl EventLoop {
 
     // Run the event loop.
     pub fn run(self) {
-        thread::Builder::new()
+        let _ = thread::Builder::new()
             .name("notify-rs kqueue".to_string())
             .spawn(|| self.event_loop_thread());
     }

src/poll.rs

@@ -76,7 +76,7 @@ impl PollWatcher {
         let event_handler = self.event_handler.clone();
         let event_handler = move |res| emit_event(&event_handler, res);
 
-        thread::Builder::new()
+        let _ = thread::Builder::new()
             .name("notify-rs poll".to_string())
             .spawn(move || {
                 // In order of priority:

src/windows.rs

@@ -84,7 +84,7 @@ impl ReadDirectoryChangesServer {
         let (action_tx, action_rx) = unbounded();
         // it is, in fact, ok to send the semaphore across threads
         let sem_temp = wakeup_sem as u64;
-        thread::Builder::new()
+        let _ = thread::Builder::new()
             .name("notify-rs windows".to_string())
             .spawn(move || {
                 let wakeup_sem = sem_temp as HANDLE;

tests/race-with-remove-dir.rs

@@ -10,7 +10,7 @@ fn test_race_with_remove_dir() {
 
     {
         let tmpdir = tmpdir.path().to_path_buf();
-        thread::Builder::new()
+        let _ = thread::Builder::new()
             .name("notify-rs test-race-with-remove-dir".to_string())
             .spawn(move || {
                 let mut watcher = notify::recommended_watcher(move |result| {