C++ model crashes QML

Setting a QList<QObject *> model as the model for a GridView causes a crash when a new model is set. Basic idea is:

QtDeclarative view;
QList<QObject *> model1;
model1 << ....;
view.rootContext()->setContextProperty("modle", QVariant::fromValue( model ) );

No problems here, the model data is used without an problems. Create a new list with data of the same type, but with fewer elements than in model1:

QList<QObject *> model2;
model2 << ....;
view.rootContext()->setContextProperty("modle", QVariant::fromValue( model ) );

This will crash. If model2 contains more elements than model1 it works ok, so the key seems to be that the second model must have less items.