fix(swarm): log local peer ID correctly

This was an oversight in #4120, where we changed the creation of `Swarm`. Thus, all usages of the new `SwarmBuilder` did not actually hit this log line.

Pull-Request: #4671.

swarm/CHANGELOG.md

@@ -11,6 +11,8 @@
 - Don't close entire connection upon `DialUpgradeError`s within `OneShotHandler`.
   Instead, the error is reported as `Err(e)` via `ConnectionHandler::ToBehaviour`.
   See [PR 4715](https://github.com/libp2p/rust-libp2p/pull/4715).
+- Log `PeerId` of `Swarm` even when constructed with new `SwarmBuilder`.
+  See [PR 4671](https://github.com/libp2p/rust-libp2p/pull/4671).
 
 ## 0.43.6
 

swarm/src/lib.rs

@@ -366,6 +366,8 @@ where
         local_peer_id: PeerId,
         config: Config,
     ) -> Self {
+        log::info!("Local peer id: {local_peer_id}");
+
         Swarm {
             local_peer_id,
             transport,
@@ -1656,17 +1658,14 @@ where
 
     /// Builds a `Swarm` with the current configuration.
     pub fn build(self) -> Swarm<TBehaviour> {
-        log::info!("Local peer id: {}", self.local_peer_id);
-        Swarm {
-            local_peer_id: self.local_peer_id,
-            transport: self.transport,
-            pool: Pool::new(self.local_peer_id, self.pool_config),
-            behaviour: self.behaviour,
-            supported_protocols: Default::default(),
-            confirmed_external_addr: Default::default(),
-            listened_addrs: HashMap::new(),
-            pending_event: None,
-        }
+        Swarm::new(
+            self.transport,
+            self.behaviour,
+            self.local_peer_id,
+            Config {
+                pool_config: self.pool_config,
+            },
+        )
     }
 }