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/timeseries/bucket_catalog.h:174: UNINIT_CTOR 117898 Class member declaration for "_numPreviouslyCommittedMeasurements".
/src/mongo/db/timeseries/bucket_catalog.cpp:984: UNINIT_CTOR 117898 Non-static class member "_numPreviouslyCommittedMeasurements" is not initialized in this constructor nor in any functions that it calls.