QWebPage::extension

[Vladimir123]

Hello.

I'm having a problem with overloading QWebPage::extension().
Here's my subclass:

class WebPage : public QWebPage
{
    Q_OBJECT
public:
    explicit WebPage(QObject *parent = 0);
 
    QString userAgentForUrl ( const QUrl & url ) const;
    bool extension(Extension extension, const ExtensionOption *option = 0, ExtensionReturn *output = 0);
};

class WebPage : public QWebPage
{
    Q_OBJECT
public:
    explicit WebPage(QObject *parent = 0);

    QString userAgentForUrl ( const QUrl & url ) const;
    bool extension(Extension extension, const ExtensionOption *option = 0, ExtensionReturn *output = 0);
};

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However extension overload doesn't get called when loadFinished() is invoked with ok == false. What am I doing wrong?