#2229: Return nullptr for metadata's attribute field when we don't ha…

…ve any
DARMA-tasking · Feb 22, 2024 · 81d91e0 · 81d91e0
1 parent 01039e3
commit 81d91e0
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/src/vt/vrt/collection/balance/lb_data_holder.cc b/src/vt/vrt/collection/balance/lb_data_holder.cc
@@ -126,6 +126,10 @@ std::unique_ptr<nlohmann::json> LBDataHolder::metadataToJson() const {
 }
 
 std::unique_ptr<nlohmann::json> LBDataHolder::rankAttributesToJson() const {
+  if (rank_attributes_.empty()) {
+    return nullptr;
+  }
+
   nlohmann::json j;
 
   for (auto const& [key, value] : rank_attributes_) {