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/query/find_common.h:178: UNINIT_CTOR 150391 Class member declaration for "objSize".
/src/mongo/db/query/find_common.h:138: UNINIT_CTOR 150391 Non-static class member "objSize" is not initialized in this constructor nor in any functions that it calls.