QList::swap causes QList entries to appear the same on subsequent query

This code:

  intersections = QList<QPointF>() << QPointF(1, 0) << QPointF(2, 0);
  intersections.swap(0, 1);
  qDebug() << intersections.at(0).x();
  qDebug() << intersections.at(1).x();

causes the two entries to be identical in release mode, under some circumstances (outputs 1\n1 instead of 2\n1). This does not happen if one just puts qDebug() << "test" after the swap. It's not an issue with qDebug() because actual code that depends on the items behaves accordingly strange, too.

Seems to not happen on Windows or Mac OS, at least according to this forum thread I've created beforehand (to make sure this isn't only a problem with my system): http://qt-project.org/forums/viewthread/51346

Example project attached.