[core] Skip duplicated IDs when querying point annotations

1 files changed, 5 insertions, 3 deletions

diff --git a/src/mbgl/map/map.cpp b/src/mbgl/map/map.cpp
index 95958602bc..bf2462e2ab 100644
--- a/src/mbgl/map/map.cpp
+++ b/src/mbgl/map/map.cpp
@@ -750,13 +750,15 @@ std::vector<Feature> Map::queryRenderedFeatures(const ScreenBox& box, const opti
 
 AnnotationIDs Map::queryPointAnnotations(const ScreenBox& box) {
     auto features = queryRenderedFeatures(box, {{ AnnotationManager::PointLayerID }});
-    AnnotationIDs ids;
-    ids.reserve(features.size());
+    std::set<AnnotationID> set;
     for (auto &feature : features) {
         assert(feature.id);
         assert(*feature.id <= std::numeric_limits<AnnotationID>::max());
-        ids.push_back(static_cast<AnnotationID>(feature.id->get<uint64_t>()));
+        set.insert(static_cast<AnnotationID>(feature.id->get<uint64_t>()));
     }
+    AnnotationIDs ids;
+    ids.reserve(set.size());
+    std::move(set.begin(), set.end(), std::back_inserter(ids));
     return ids;
 }