diff --git a/src/lib-network/src/Server.cpp b/src/lib-network/src/Server.cpp
index ac292c5c..19edd914 100644
--- a/src/lib-network/src/Server.cpp
+++ b/src/lib-network/src/Server.cpp
@@ -68,6 +68,8 @@ void Server::update(std::function<void(const std::string&)> log)
     sf::Packet packet;
     for (auto&& [key, client] : registeredClients)
     {
+        // FIXME: what if registeredClient is removed in the middle of the loop?
+        // --> deferred removal (or indexed removal)
         if (client.socket->receive(packet) != sf::Socket::Status::Done)
             continue;
 
diff --git a/src/server-test/Main.cpp b/src/server-test/Main.cpp
index 66e3c658..c72947d0 100644
--- a/src/server-test/Main.cpp
+++ b/src/server-test/Main.cpp
@@ -9,7 +9,8 @@ void serverLoop(Server server)
 {
     while (serverEnabled)
     {
-        server.update();
+        server.update([](const std::string& log)
+                      { std::cout << log << std::endl; });
     }
 }