void QrMosquitto::setLeds(short mask)
{
    log_warn << "STALE OK";
    fbb.Clear();
    log_warn << "UZ SE NEVYPISE";
    auto mloc = Angee::CreateLedState(fbb, mask);
    FinishLedStateBuffer(fbb, mloc);
    sendBuffer(fbb.GetBufferPointer(), fbb.GetSize(), "led/state");
}

void QrMosquitto::sendCode(const char* data)
{
    std::string encoded(data);
    std::string decoded = base64decode(encoded);

    QrCode qr;
    if(qr.ParseFromString(decoded)) {
        log_warn << "PROTOBUF Z QR: " << qr.SerializeAsString();
        setLeds(3);                         // !!!!!
        log_warn << "UZ SE NEVYPISE";
        fbb.Clear();
        std::vector<Offset<String>> my;
        my.push_back(fbb.CreateString("sound_beep"));
        auto vec = fbb.CreateVector(my);
....

/*
(gdb) run
Starting program: /home/martin/workspace/ang-qr-scanner/build/bin/ang-qr-scanner
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[New Thread 0x7ffff46bc700 (LWP 18623)]
[INFO] /home/martin/workspace/ang-qr-scanner/src/qr_scanner.cpp:32:myHandler()> QR-Code DATA= CghrdW5kb21yZBIAGhBrTmJMUUIwYU96QlVDcGVJIihkZXZlbDIubWVldGFuZ2VlLmNvbTo5MDAwL2FwaS8yLjAvZGV2aWNlKgAyAA==
[WARN] /home/martin/workspace/ang-qr-scanner/src/qr_mosquitto.cpp:89:sendCode()> PROTOBUF Z QR:
kundomrdkNbLQB0aOzBUCpeI"(devel2.meetangee.com:9000/api/2.0/device*2
[WARN] /home/martin/workspace/ang-qr-scanner/src/qr_mosquitto.cpp:48:setLeds()> STALE OK

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x7ffff46bc700 (LWP 18623)]
0x00000000004176b2 in flatbuffers::vector_downward::clear() ()
(gdb) bt
#0  0x00000000004176b2 in flatbuffers::vector_downward::clear() ()
#1  0x0000000000417cd2 in flatbuffers::FlatBufferBuilder::Clear() ()
#2  0x0000000000415b49 in QrMosquitto::setLeds(short) ()
#3  0x0000000000416346 in QrMosquitto::sendCode(char const*) ()
#4  0x0000000000415045 in QrScanner::myHandler(zbar::zbar_image_s*, void const*) ()
#5  0x00007ffff7686a30 in ?? () from /usr/lib/libzbar.so.0
#6  0x00007ffff76a5981 in ?? () from /usr/lib/libzbar.so.0
#7  0x00007ffff76a5c6f in ?? () from /usr/lib/libzbar.so.0
#8  0x00007ffff76a5d3f in ?? () from /usr/lib/libzbar.so.0
#9  0x00007ffff7686f7b in ?? () from /usr/lib/libzbar.so.0
#10 0x00007ffff68f26aa in start_thread (arg=0x7ffff46bc700) at pthread_create.c:333
#11 0x00007ffff6e1feed in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109
(gdb)
*/