Uninitialized scalar field

The field will contain an arbitrary value left over from earlier computations. A scalar field is not initialized by the constructor
/data/bazel_cache/1de52aaeb35278243ca29a4785ce7969/execroot/_main_/src/mongo/db/exec/matcher/matcher.h:419: UNINIT_CTOR 171672 Class member declaration for "_result".
/data/bazel_cache/1de52aaeb35278243ca29a4785ce7969/execroot/_main_/src/mongo/db/exec/matcher/matcher.h:261: UNINIT_CTOR 171672 Non-static class member "_result" is not initialized in this constructor nor in any functions that it calls.