Can't use QList in class

Question

Compiles smoothly, but crashes when using the class. When I remove QList from the class the application works fine.

Is there a bug here that I don't see?

.h

#ifndef INFOMODEL_H
#define INFOMODEL_H

#include <QString>
#include <QList>

class InfoModel
{
public:
    struct Active{
        quint8 quantity;
        quint16 validTime;
        QString name;
    }
private:
    QList<Active> actives;//Why Crash?!

public:
    InfoModel();
};

#endif // INFOMODEL_H

.cpp

#include "infomodel.h"

InfoModel::InfoModel()
{
}