refactor: 重构运行时

pkg/app/app.go

@@ -100,7 +100,11 @@ func Loop() error {
 			// 然后才可以退出主循环
 			checkPubsEmpty()
 			setStatus(Stopped)
-			return ctx.Err()
+			err := ctx.Err()
+			if errors.Is(err, context.Canceled) {
+				return nil
+			}
+			return err
 		}
 
 		// We don't want to exit until we've received at least one message.

pkg/app/stats.go

@@ -40,5 +40,5 @@ func initMemoryProfile(memprof string) {
 
 func freeStats() {
 	newStats := reflect.New(reflect.TypeOf(stats))
-	reflect.ValueOf(stats).Set(newStats.Elem())
+	reflect.ValueOf(&stats).Elem().Set(newStats.Elem())
 }