Segmentation fault (core dumped) when using memcpy()

Question

I am facing segmentation fault when I'm doing memcpy():

 case 32:
        std::cout<<"ARVRPipe: RECEIVED_MAP_ROUTE_PACKET_RESULTS"<<std::endl;

        
        memcpy(&(mCommonMessagePtr->maproutePacket), inputBuffer, inputBufferSize);


        received_data.path_size = mCommonMessagePtr->maproutePacket.path_size;
        std::cout<<"Path Size  : " <<received_data.path_size<<std::endl;

        received_data.instruction_size = mCommonMessagePtr->maproutePacket.instruction_size;
        std::cout<<"Instruction Size  : " <<received_data.instruction_size<<std::endl;


        if (mCommonMessagePtr && !mCommonMessagePtr->maproutePacket.path.empty()) {

            if (mCommonMessagePtr->maproutePacket.path.size() == received_data.path_size) {
                
                std::cout<<"Inside If condition : "<<std::endl;

                received_data.path.resize(received_data.path_size);
                size_t path_coor_size = received_data.path.size();
                std::cout<<"Size of received_data path : "<<path_coor_size<<std::endl;

                // Segmentation fault in the below line
                memcpy(received_data.path.data(), mCommonMessagePtr->maproutePacket.path.data(),  path_coor_size* sizeof(std::pair<double, double>));

                // Print out path coordinates
                for (const auto& coord : received_data.path) {
                    std::cout << "Coordinate : " << coord.first << " --- " << coord.second << std::endl;
                }
            } else {
                std::cerr << "Error: Size mismatch between mCommonMessagePtr->maproutePacket.path and received_data.path_size" << std::endl;
            }

        }

so this received_data and maproutePacket both are object to the same structure given below:

struct ReceivedData
{
  int path_size;
  int instruction_size;
  std::vector<std::pair<double, double>> path;
  double distance;
  std::vector<Instruction> instructions;
  double time;
};

when I do memcpy() it shows segmentation fault in the below line:

 memcpy(received_data.path.data(), mCommonMessagePtr->maproutePacket.path.data(),  path_coor_size* sizeof(std::pair<double, double>));