fix

Sources/Punchnet/SDLSuperClient.swift

@@ -100,13 +100,19 @@ actor SDLSuperClient {
                 // --MARK: 心跳机制
                 group.addTask {
                     while true {
+                        
+                        do {
+                            
                             try Task.checkCancellation()
                             //await self.ping()
                             try Task.checkCancellation()
                             try await Task.sleep(nanoseconds: 5 * 1_000_000_000)
                             try Task.checkCancellation()
-                    }
+                        } catch let err {
                             NSLog("[SDLSuperClient] heartbeat cancelled")
+                            throw err
+                        }
+                    }
                 }
                 
                 try await group.waitForAll()