From a93b1a1acab8a703f2a6bcf9d18139d0dbb9c796 Mon Sep 17 00:00:00 2001
From: Marco <mgross@sw-gross.de>
Date: Tue, 11 Jul 2023 18:21:54 +0200
Subject: [PATCH] Fix nil pointer dereference.

---
 usher/usher.go | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/usher/usher.go b/usher/usher.go
index 239c111..cfbbd51 100644
--- a/usher/usher.go
+++ b/usher/usher.go
@@ -34,7 +34,7 @@ func (u *Usher) CreateNewPrivateLobby(player *chess.Player) *lobbies.Lobby {
 
 func (u *Usher) FindExistingPrivateLobby(p utils.Passphrase) *lobbies.Lobby {
 	lobby := lobbies.GetLobbyRegistry().GetLobbyByPassphrase(p)
-	if lobby.IsFull() {
+	if lobby == nil || lobby.IsFull() {
 		return nil
 	}
 	return lobby