[core] Ensure that TileWorker can retain tileData after layout

2 files changed, 5 insertions, 0 deletions

diff --git a/src/mbgl/annotation/annotation_tile.cpp b/src/mbgl/annotation/annotation_tile.cpp
index 6b225ce20b..c9ad9b5214 100644
--- a/src/mbgl/annotation/annotation_tile.cpp
+++ b/src/mbgl/annotation/annotation_tile.cpp
@@ -40,6 +40,10 @@ optional<Value> AnnotationTileFeature::getValue(const std::string& key) const {
 AnnotationTileLayer::AnnotationTileLayer(std::string name_)
     : name(std::move(name_)) {}
 
+std::unique_ptr<GeometryTileData> AnnotationTileData::clone() const {
+    return std::make_unique<AnnotationTileData>(*this);
+}
+
 const GeometryTileLayer* AnnotationTileData::getLayer(const std::string& name) const {
     auto it = layers.find(name);
     if (it != layers.end()) {
diff --git a/src/mbgl/annotation/annotation_tile.hpp b/src/mbgl/annotation/annotation_tile.hpp
index 19a731ee7b..d43ec82d38 100644
--- a/src/mbgl/annotation/annotation_tile.hpp
+++ b/src/mbgl/annotation/annotation_tile.hpp
@@ -56,6 +56,7 @@ private:
 
 class AnnotationTileData : public GeometryTileData {
 public:
+    std::unique_ptr<GeometryTileData> clone() const override;
     const GeometryTileLayer* getLayer(const std::string&) const override;
 
     std::unordered_map<std::string, AnnotationTileLayer> layers;