Prevent loading a world with unresolved dependencies (#12542)

src/server.cpp

@@ -425,14 +425,10 @@ void Server::init()
 
 	m_modmgr = std::make_unique<ServerModManager>(m_path_world);
 	std::vector<ModSpec> unsatisfied_mods = m_modmgr->getUnsatisfiedMods();
-
 	// complain about mods with unsatisfied dependencies
 	if (!m_modmgr->isConsistent()) {
-		m_modmgr->printUnsatisfiedModsError();
-
-		warningstream
-			<< "You have unsatisfied dependencies, loading your world anyway. "
-			<< "This will become a fatal error in the future." << std::endl;
+		std::string error = m_modmgr->getUnsatisfiedModsError();
+		throw ServerError(error);
 	}
 
 	//lock environment