zeromq with protobuf segmentation fault while parsing in c++

[Nayab Rasul]

I am using zeromq with protobuf to send/recieve messages but code was crashing on receiver end while ParseFromString with Segmentation fault error.

Scan is my message and i has float data types as repeated filed.

sender.cpp   // part of code sending

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 // part of code recieving

zmq::message_t recieved;

socket.recv (&recieved);

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

Is there any example code for sending/recieving with repeated float fields.

thank you.

[Henner Zeller]

no wonder, pb_laser_msg_rcv is an uninitizliaed pointer.

Do

Scan *b_laser_msg_rcv = new Scan();

pb_laser_msg_rcv->...

(or allocate it on the stack or elsewhere).

Is there any example code for sending/recieving with repeated float fields.

thank you.

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