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/sbe_stage_builder_expression.cpp:79: UNINIT_CTOR 134308 Class member declaration for "frameId".
/src/mongo/db/query/sbe_stage_builder_expression.cpp:67: UNINIT_CTOR 134308 Non-static class member "frameId" is not initialized in this constructor nor in any functions that it calls.
/src/mongo/db/query/sbe_stage_builder_expression.cpp:83: UNINIT_CTOR 134308 Class member declaration for "nextSlotId".
/src/mongo/db/query/sbe_stage_builder_expression.cpp:67: UNINIT_CTOR 134308 Non-static class member "nextSlotId" is not initialized in this constructor nor in any functions that it calls.