message: handle violation of maybe-uninitialized
diff: @@ -51,8 +51,8 @@ class BasicQuantileStatMap {
  using TimePoint = typename ClockT::time_point;
  struct StatDef {
  - ExportType type;
  - double quantile;
  + ExportType type{};
  + double quantile{};
  };
  struct SnapshotEntry {
  