Error: Cannot connect (null)::readyRead() to mythread::readyRead() - c++

Question

I am writing a multithread server but during the compile in "mythraed" class i get the following errors":
1) Cannot connect (null)::readyRead() to mythread::readyRead()
2) Cannot connect (null)::disconnected() to mythread::disconnected()
How should i fix it?
here is my code:
void mythread::run()
{
qDebug() << " Thread started";
connect(m_client, SIGNAL(readyRead()), this, SLOT(readyRead()), Qt::DirectConnection);
connect(m_client, SIGNAL(disconnected()), this, SLOT(disconnected()));
qDebug() << " Client connected";
exec();
}
void mythread::readyRead()
{
QByteArray Data = m_client->readAll();
qDebug()<< " Data in: " << Data;
m_client->write(Data);
}
void mythread::disconnected()
{
qDebug() << " Disconnected";
m_client->deleteLater();
exit(0);
}
myclient:
myclient::myclient(QObject* parent): QObject(parent)
{
QObject::connect(&m_client, SIGNAL(connected()),this, SLOT(startTransfer()));
}
void myclient::start(QString address, quint16 port)
{
QHostAddress LocalHost;
m_client.connectToHost(LocalHost, 6666);
}
void myclient::startTransfer()
{
m_client.write("Hello", 5);
}

Answer 1

Apparently, m_client is nullptr.
if (m_client) {
connect(m_client, SIGNAL(readyRead()), this, SLOT(readyRead()), Qt::DirectConnection);
}
Also you don't need explicitly disconnect your connection, from documentation:
All signals to and from the object are automatically disconnected, and any pending posted events for the object are removed from the event queue. However, it is often safer to use deleteLater() rather than deleting a QObject subclass directly.