Qt network issue: QNetworkReplyHttpImplPrivate::_q_startOperation was called more than once QUrl

[Cobra91151]

Hello!

When I have installed Qt 5.9.9 and use QNetworkAccessManager, it displays the following issue:

QNetworkReplyHttpImplPrivate::_q_startOperation was called more than once QUrl("https://....")

No such issue was present in the Qt 5.9.8. Any ideas how to fix it? Or is it a bug in Qt 5.9.9? Thanks.

[Cobra91151]

Yes, it is a bug. I have checked the code from Qt 5.9.9 - qnetworkreplyhttpimpl.cpp:

void QNetworkReplyHttpImplPrivate::_q_startOperation()
{
    Q_Q(QNetworkReplyHttpImpl);

    // ensure this function is only being called once
    if (state == Working) {
        qDebug() << "QNetworkReplyHttpImplPrivate::_q_startOperation was called more than once" << url;
        return;
    }
    state = Working;
...

And from Qt 5.13.2 and Qt 5.14.0:

void QNetworkReplyHttpImplPrivate::_q_startOperation()
{
    Q_Q(QNetworkReplyHttpImpl);

    if (state == Working) // ensure this function is only being called once
        return;

    state = Working;
...

As you can see in Qt 5.13.2 and Qt 5.14.0 code, no qDebug() is found, but it is present in Qt 5.9.9. I will report it.

[Christian Ehrlicher]

@Cobra91151 said in Qt network issue: QNetworkReplyHttpImplPrivate::_q_startOperation was called more than once QUrl:

I will report it.

It was already fixed, no need to open another report for it.

[Cobra91151]

@Christian-Ehrlicher

Hello!

You mean it was fixed in Qt 5.12.2: https://bugreports.qt.io/browse/QTBUG-72463? I need it for Qt 5.9.9. I will fix it by myself. Thanks.

[Christian Ehrlicher]

@Cobra91151 Correct, it was not backported because it's not really critical, only a (wrong) warning

[Cobra91151]

So, I have fixed this issue and successfully rebuilt Qt 5.9.9. Now it works well. The issue is resolved.