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/cloner.cpp:226: UNINIT_CTOR 122382 Class member declaration for "numSeen".
/src/mongo/db/cloner.cpp:95: UNINIT_CTOR 122382 Non-static class member "numSeen" is not initialized in this constructor nor in any functions that it calls.
/src/mongo/db/cloner.cpp:230: UNINIT_CTOR 122382 Class member declaration for "saveLast".
/src/mongo/db/cloner.cpp:95: UNINIT_CTOR 122382 Non-static class member "saveLast" is not initialized in this constructor nor in any functions that it calls.