message: Adding constructor to RealmToCalculate to make GCC 4.9 happy.
diff: @@ -107,6 +107,14 @@ public:
  std::unique_ptr<SharedGroup> shared_group;
  std::queue<VersionID> versions;
  bool pending_deletion = false;
  +
  + // constructor to make GCC 4.9 happy
  + RealmToCalculate(std::string realm_id, std::string virtual_path, std::shared_ptr<_impl::RealmCoordinator> coordinator)
  + : realm_id(std::move(realm_id))
  + , virtual_path(std::move(virtual_path))
  + , coordinator(std::move(coordinator))
  + {
  + }
  };
  std::queue<RealmToCalculate*> m_work_queue;
  std::unordered_map<std::string, RealmToCalculate> m_realms;
  