问使用调试版本静态库时，未初始化C++成员变量。

EN

Tileset::Tileset(
    const TilesetExternals& externals,
    const std::string& url,
    const TilesetOptions& options)
    : _externals(externals),
      _asyncSystem(externals.asyncSystem),
      _userCredit(
          (options.credit && externals.pCreditSystem)
              ? std::optional<Credit>(externals.pCreditSystem->createCredit(
                    options.credit.value(),
                    options.showCreditsOnScreen))
              : std::nullopt),
      _url(url),
      _isRefreshingIonToken(false),
      _options(options),
      _pRootTile(),
      _previousFrameNumber(0),
      _loadsInProgress(0),
      _subtreeLoadsInProgress(0),
      _overlays(*this),
      _tileDataBytes(0),
      _supportsRasterOverlays(false),
      _gltfUpAxis(CesiumGeometry::Axis::Y),
      _distancesStack(),
      _nextDistancesVector(0) {
  if (!url.empty()) {
    CESIUM_TRACE_USE_TRACK_SET(this->_loadingSlots);
    this->notifyTileStartLoading(nullptr);
    LoadTilesetDotJson::start(*this, url).thenInMainThread([this]() {
      this->notifyTileDoneLoading(nullptr);
    });
  }
}