https://github.com/The-Legion-Preservation-Project/LegionCore-7.3.5/blame/fed58f79c498521836612acd12009e9fa9e60e31/src/common/Threading/LockedMap.h#L205 LockedMap<Key, T> x; m_storage.swap(x.storage); error edit m_storage.swap(x.m_storage);