src/rpcmining.cpp: In function ‘json_spirit::Value GetNetworkHashPS(int)’:
src/rpcmining.cpp:121:38: error: cannot convert ‘CBlockIndex::IsProofOfWork’ from type ‘bool (CBlockIndex::)() const’ to type ‘bool’
         if (pindexLast->IsProofOfWork) {
                                      ^