protocol buffers - zeromq with protobuf segmentation fault while parsing in c++ -

i using zeromq protobuf send/recieve messages code crashing on receiver end segmentation fault (core dumped) error while parsing received data.

scan message.

sender.cpp

scan proto_ls_msg; proto_ls_msg.set_angle_min(0.0); proto_ls_msg.set_angle_max(180.5); std::string ls_msg_str; proto_ls_msg.serializetostring(&ls_msg_str); zmq::message_t request (ls_msg_str.size()); memcpy (request.data(), ls_msg_str.c_str(),ls_msg_str.size()); socket.send (request); 

collector.cpp

zmq::message_t recieved; socket.recv (&recieved); //thanks πάντα ῥεῖ std::string ls_msg_str((char*)recieved.data(),recieved.size());  scan *pb_laser_msg_rcv; pb_laser_msg_rcv->parsefromstring(ls_msg_str); // <--  segmentation fault here 

i tried different way of converting zmq::message_t std::string still gives segmentation fault.

edit update:

//std::string ls_msg_str((char*)recieved);    std::string ls_msg_str((char*)recieved.data(),recieved.size()); 

thanks.

iirc can't directly cast zmq::message_t string. should use data member create string. recieved.data not '\0' terminated, need pass size when construct ls_msg_str instance:

std::string ls_msg_str((char*)recieved.data,recieved.size);                                     // ^^^^          ^^^^