From ded43e0f2d07adc399da5962454d9873021b59ac Mon Sep 17 00:00:00 2001
From: Till Faelligen <2353100+S7evinK@users.noreply.github.com>
Date: Tue, 6 Dec 2022 13:27:33 +0100
Subject: [PATCH] Fix issue with sending presence events to invalid servers

---
 federationapi/consumers/roomserver.go | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/federationapi/consumers/roomserver.go b/federationapi/consumers/roomserver.go
index d16af6626..0c1080afa 100644
--- a/federationapi/consumers/roomserver.go
+++ b/federationapi/consumers/roomserver.go
@@ -232,7 +232,7 @@ func (s *OutputRoomEventConsumer) processMessage(ore api.OutputNewRoomEvent, rew
 }
 
 func (s *OutputRoomEventConsumer) sendPresence(roomID string, addedJoined []types.JoinedHost) {
-	joined := make([]gomatrixserverlib.ServerName, len(addedJoined))
+	joined := make([]gomatrixserverlib.ServerName, 0, len(addedJoined))
 	for _, added := range addedJoined {
 		joined = append(joined, added.ServerName)
 	}