Uninitialized double crashes qt5qml.dll on 32-bit Windows ARM

An uninitialized double property crashes the QML engine when the property is evaluated in QML on Qt 5.6.

This also affects applications that use qreal properties when “-qreal float” is omitted when building Qt.

Here is the relevant code:

C++:

class TestBadQReal : public QObject
{
    Q_OBJECT
    Q_PROPERTY(double badQReal  READ badQReal  WRITE setBadQReal  NOTIFY badQRealChanged)
public:
    TestBadQReal()
    {
        *reinterpret_cast<quint64 *>(&mBadQReal) = 0x7FFFFFFFFFFFFFFF;
}

QML:

    property real storage: myType.badQReal
        TestBadQreal { id: myType }

Serial port output:

PID:08A40341 TID:08030342 Exception 'Data Abort' (0x4): Thread-Id=08030342(pth=b0822538), Proc-Id=08a4033e(pprc=b08a5c18) 'BadQReal.EXE', VM-active=08a4033e(pprc=b08a5c18) 'BadQReal.EXE'

PID:08A40341 TID:08030342 PC=42bd96c1(qt5qml.dll+0x000696c1) RA=42be54fd(qt5qml.dll+0x000754fd) SP=0013f3b8, BVA=00000000

I attached a minimal project.

Can someone check if this occurs on Qt 5.12 on either 32-bit desktop or ARM?