review pass the last

lib/runtime/src/sys/macos/net.rs

@@ -440,10 +440,12 @@ fn create_dns_pool() -> io::Result<BlockingPool> {
         .map(usize::from)
         .unwrap_or(2)
         .clamp(2, 4);
+    let mut spawned = 0usize;
+    let mut last_error = None;
 
     for index in 0..worker_count {
         let receiver = Arc::clone(&receiver);
-        thread::Builder::new()
+        match thread::Builder::new()
             .name(format!("ruin-runtime-dns-{index}"))
             .spawn(move || {
                 loop {
@@ -456,8 +458,16 @@ fn create_dns_pool() -> io::Result<BlockingPool> {
                         Err(_) => break,
                     }
                 }
-            })
-            .map_err(io::Error::other)?;
+            }) {
+            Ok(_) => spawned += 1,
+            Err(error) => last_error = Some(error),
+        }
+    }
+
+    if spawned == 0 {
+        return Err(io::Error::other(last_error.expect(
+            "at least one DNS worker spawn should have been attempted",
+        )));
     }
 
     Ok(BlockingPool { sender })
@@ -593,7 +603,7 @@ impl RawSocketAddr {
                     sin_family: libc::AF_INET as libc::sa_family_t,
                     sin_port: addr.port().to_be(),
                     sin_addr: libc::in_addr {
-                        s_addr: u32::from_ne_bytes(addr.ip().octets()),
+                        s_addr: u32::from_be_bytes(addr.ip().octets()).to_be(),
                     },
                     sin_zero: [0; 8],
                 };