Uninitialized scalar field

The field will contain an arbitrary value left over from earlier computations. A scalar field is not initialized by the constructor
/src/mongo/db/s/create_collection_coordinator.h:143: UNINIT_CTOR 120046 Class member declaration for "_collectionEmpty".
/src/mongo/db/s/create_collection_coordinator.cpp:325: UNINIT_CTOR 120046 Non-static class member "_collectionEmpty" is not initialized in this constructor nor in any functions that it calls.