A new defect has been detected and assigned to siyuan.zhou@10gen.com in Coverity Connect.
http://coverity.mongodb.com//sourcebrowser.htm?projectId=10001#mergedDefectId=72592
The defect was flagged by checker NEGATIVE_RETURNS in
file /src/mongo/db/exec/geo_near.cpp
function mongo::GeoNear2DSphereStage::DensityEstimator::buildIndexScan(mongo::OperationContext *, mongo::WorkingSet *, mongo::Collection *)
and this ticket was created by amalia.hawkins@10gen.com