Fix wasm

common/client-core/src/client/packet_statistics_control.rs

@@ -27,6 +27,16 @@ use std::net::SocketAddr;
 #[cfg(not(all(target_arch = "wasm32", target_os = "unknown")))]
 use tokio::net::TcpListener;
 
+#[cfg(all(target_arch = "wasm32", target_os = "unknown"))]
+struct DummyListener;
+
+#[cfg(all(target_arch = "wasm32", target_os = "unknown"))]
+impl DummyListener {
+    async fn accept(&self) {
+        log::warn!("Metrics server is not supported on wasm32-unknown-unknown");
+    }
+}
+
 use crate::spawn_future;
 
 // Time interval between reporting packet statistics
@@ -508,7 +518,7 @@ impl PacketStatisticsControl {
         cfg_if::cfg_if! {
             if #[cfg(all(target_arch = "wasm32", target_os = "unknown"))] {
                 log::warn!("Metrics server is not supported on wasm32-unknown-unknown");
-                let listener = None;
+                let listener: Option<DummyListener> = None;
             } else if #[cfg(feature = "metrics-server")] {
                 let mut metrics_port = 18000;
                 let listener: Option<TcpListener>;