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/repl/tenant_collection_cloner.h:221: UNINIT_CTOR 116160 Class member declaration for "_collectionClonerBatchSize".
/src/mongo/db/repl/tenant_collection_cloner.cpp:108: UNINIT_CTOR 116160 Non-static class member "_collectionClonerBatchSize" is not initialized in this constructor nor in any functions that it calls.