QDataStream "stopped working"

[rackover]

Hello,

I'm doing the following operation :

char firstQuery[512] = "{'command':'ask_session','version':'1.0','user_agent':'faf-client'}";

 QByteArray *block;
    QDataStream *out = new QDataStream(block, QIODevice::ReadWrite);
    out->setVersion(QDataStream::Qt_5_10);

    uint length = (2*sizeof(firstQuery) + 4);
    qDebug() << length;

    out->writeBytes((const char*)firstQuery, length);

The next step would be to send this block into a socket.
But I have a problem : the last function call "writeBytes" causes the app to "Stop working" with no error messages.

Am I doing something wrong ?

[VRonin]

@rackover said in QDataStream "stopped working":

QByteArray *block;

dangling pointer

out->writeBytes((const char*)firstQuery, length);

out of bounds ( length>=std::extent<decltype(firstQuery)>::value)

---

const QByteArray firstQuery ("{'command':'ask_session','version':'1.0','user_agent':'faf-client'}");

 QByteArray block;
    QDataStream out (&block, QIODevice::ReadWrite);
    out.setVersion(QDataStream::Qt_5_10);
    out.write(firstQuery);