Godot SMP Linux Crashfix

godot_smp_mark.patch

diff --git a/godotsteam_multiplayer_peer.cpp b/godotsteam_multiplayer_peer.cpp
index df4b525..b190601 100644
--- a/godotsteam_multiplayer_peer.cpp
+++ b/godotsteam_multiplayer_peer.cpp
@@ -270,6 +270,8 @@ void SteamMultiplayerPeer::lobby_chat_update(LobbyChatUpdate_t *p_chat_update) {
     add_peer(p_chat_update->m_ulSteamIDUserChanged);
   } else {
     // If they didn't enter, it doesn't matter why, they are leaving
+    // Collect connections to remove to avoid iterator invalidation
+    LocalVector<HSteamNetConnection> connections_to_remove;
     for (KeyValue<HSteamNetConnection, Ref<SteamPacketPeer>> &E :
          steam_connections) {
       if (E.value->get_steam_id() == p_chat_update->m_ulSteamIDUserChanged) {
@@ -278,10 +280,14 @@ void SteamMultiplayerPeer::lobby_chat_update(LobbyChatUpdate_t *p_chat_update) {
         } else {
           // We have an open connection but no peer
           E.value->disconnect_peer(true);
-          steam_connections.erase(E.value->get_connection_handle());
+          connections_to_remove.push_back(E.value->get_connection_handle());
         }
       }
     }
+    // Remove collected connections outside the iteration
+    for (HSteamNetConnection conn : connections_to_remove) {
+      steam_connections.erase(conn);
+    }
   }
 }