A new defect has been detected and assigned to renctan in Coverity Connect.
http://coverity.mongodb.com//sourcebrowser.htm?projectId=10001#mergedDefectId=30519
The defect was flagged by checker DEADCODE in
file /src/mongo/s/d_state.cpp
function mongo::_checkShardVersion(mongo::Message &, mongo::DbResponse *)
and this ticket was created by asya