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/util/net/sock.h:230: UNINIT_CTOR 114956 Class member declaration for "_fdCreationMicroSec".
/src/mongo/util/net/sock.cpp:241: UNINIT_CTOR 114956 Non-static class member "_fdCreationMicroSec" is not initialized in this constructor nor in any functions that it calls.