#include <QtCore>
#include <fenv.h>

int main(int argc, char *argv[])
{
    QCoreApplication a(argc, argv);

    feenableexcept(FE_INVALID | FE_DIVBYZERO | FE_OVERFLOW | FE_UNDERFLOW);

    qDebug() << "A1";
    auto pointF = QPointF(2.0, 2.0);
    qDebug() << "B1";
    auto point = pointF.toPoint();
    qDebug() << "C1";
    Q_UNUSED(point);

    qDebug() << "A2";
    auto pointFInf = QPointF(qInf(), qInf());
    qDebug() << "B2";
    auto pointInf = pointFInf.toPoint();
    qDebug() << "C2";
    Q_UNUSED(pointInf);

    return a.exec();
}

A1
B1
C1
A2
B2
Floating point exception (core dumped)