Conversion to Qt5 connect doesn't work for "implicit" pointers

#include <QAction>
#include <QPointer>
#include <QObject>

class Class : public QObject
{
    Q_OBJECT

private slots:
    void slot() {}

    void func()
    {
        QPointer<QAction> action;
        connect(action, SIGNAL(triggered()), this, SLOT(slot()));
    }
};