Update multisub.go

event/multisub.go

@@ -19,6 +19,13 @@ package event
 // JoinSubscriptions joins multiple subscriptions to be able to track them as
 // one entity and collectively cancel them or consume any errors from them.
 func JoinSubscriptions(subs ...Subscription) Subscription {
+	// Handle empty subscription list to avoid blocking forever
+	if len(subs) == 0 {
+		return NewSubscription(func(unsubbed <-chan struct{}) error {
+			<-unsubbed
+			return nil
+		})
+	}
 	return NewSubscription(func(unsubbed <-chan struct{}) error {
 		// Unsubscribe all subscriptions before returning
 		defer func() {