Fixed download

src/server/download.cxx

@@ -53,7 +53,7 @@ void Server::download(const std::shared_ptr<restbed::Session> &s) {
                     {"Content-Length", std::to_string(node->size)},
                     {"Content-Disposition", "attachment; filename=\"" + node->name + "\""}
                 },
-                [&](const std::shared_ptr<restbed::Session>& s) {
+                [user=user, node=node](const std::shared_ptr<restbed::Session>& s) {
                     std::shared_lock lock{user->node_lock};
                     restbed::Bytes buf(1024*1024*4, 0);
                     std::ifstream f{user->user_dir / std::to_string(node->id)};