Pyside2 using the division and multiplication will return and change original value in release version

C:\Python27\python.exe setup.py build --ignore-git --qmake=C:\Qt\5.6\msvc2015_64\bin\qmake.exe --cmake="C:\Program Files (x86)\CMake\bin\cmake.exe" --jobs=9 --jom --verbose

from PySide2.QtGui import *
from PySide2.QtCore import *

vals = [QTransform(), QMatrix4x4(), QSize(1, 1), QSizeF(1, 1), QPoint(1, 1), QQuaternion(1, 1, 1, 1), QVector2D(1, 1), QVector3D(1, 1, 1), QVector4D(1, 1, 1, 1)]
for a in vals:
    print(type(a))
    print(" org: %r" % a)
    x = (a * 2)
    print(" mul: %r" % a)
    y = (a / 2)
    print(" div: %r" % a)
    print(" test x: %r %r" % (a == x, id(a) == id(x)))
    print(" test y: %r %r" % (a == y, id(a) == id(y)))

<type 'PySide2.QtGui.QTransform'>
 org: PySide2.QtGui.QTransform(1.000000, 0.000000, 0.000000, 0.000000, 1.000000,
 0.000000, 0.000000, 0.000000, 1.000000)
 mul: PySide2.QtGui.QTransform(1.000000, 0.000000, 0.000000, 0.000000, 1.000000,
 0.000000, 0.000000, 0.000000, 1.000000)
 div: PySide2.QtGui.QTransform(0.500000, 0.000000, 0.000000, 0.000000, 0.500000,
 0.000000, 0.000000, 0.000000, 0.500000)
 test x: False False
 test y: True True
<type 'PySide2.QtGui.QMatrix4x4'>
 org: PySide2.QtGui.QMatrix4x4((1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1))

 mul: PySide2.QtGui.QMatrix4x4((1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1))

 div: PySide2.QtGui.QMatrix4x4((0.5, 0, 0, 0, 0, 0.5, 0, 0, 0, 0, 0.5, 0, 0, 0,
0, 0.5))
 test x: False False
 test y: True True
<type 'PySide2.QtCore.QSize'>
 org: PySide2.QtCore.QSize(1, 1)
 mul: PySide2.QtCore.QSize(2, 2)
 div: PySide2.QtCore.QSize(1, 1)
 test x: True True
 test y: True True
<type 'PySide2.QtCore.QSizeF'>
 org: PySide2.QtCore.QSizeF(1.000000, 1.000000)
 mul: PySide2.QtCore.QSizeF(2.000000, 2.000000)
 div: PySide2.QtCore.QSizeF(1.000000, 1.000000)
 test x: True True
 test y: True True
<type 'PySide2.QtCore.QPoint'>
 org: PySide2.QtCore.QPoint(1, 1)
 mul: PySide2.QtCore.QPoint(2, 2)
 div: PySide2.QtCore.QPoint(1, 1)
 test x: True True
 test y: True True
<type 'PySide2.QtGui.QQuaternion'>
 org: PySide2.QtGui.QQuaternion(1.000000, 1.000000, 1.000000, 1.000000)
 mul: PySide2.QtGui.QQuaternion(1.000000, 1.000000, 1.000000, 1.000000)
 div: PySide2.QtGui.QQuaternion(0.500000, 0.500000, 0.500000, 0.500000)
 test x: False False
 test y: True True
<type 'PySide2.QtGui.QVector2D'>
 org: PySide2.QtGui.QVector2D(1.000000, 1.000000)
 mul: PySide2.QtGui.QVector2D(1.000000, 1.000000)
 div: PySide2.QtGui.QVector2D(0.500000, 0.500000)
 test x: False False
 test y: True True
<type 'PySide2.QtGui.QVector3D'>
 org: PySide2.QtGui.QVector3D(1.000000, 1.000000, 1.000000)
 mul: PySide2.QtGui.QVector3D(1.000000, 1.000000, 1.000000)
 div: PySide2.QtGui.QVector3D(0.500000, 0.500000, 0.500000)
 test x: False False
 test y: True True
<type 'PySide2.QtGui.QVector4D'>
 org: PySide2.QtGui.QVector4D(1.000000, 1.000000, 1.000000, 1.000000)
 mul: PySide2.QtGui.QVector4D(1.000000, 1.000000, 1.000000, 1.000000)
 div: PySide2.QtGui.QVector4D(0.500000, 0.500000, 0.500000, 0.500000)
 test x: False False
 test y: True True

Qt 5.6.2 (x86_64-little_endian-lp64 shared (dynamic) debug build; by GCC 5.3.1 20160413)
FAILS:   [QPoint*] [QPoint/] [QPointF*] [QPointF/] [QSize*] [QSize/] [QSizeF*] [QSizeF/] [QMargins*] [QMargins/] [QTransform*] [QMatrix4x4*] [QVector2D*] [QVector3D*] [QVector4D*] [QQuaternion*]

Qt 5.6.2 (x86_64-little_endian-lp64 shared (dynamic) debug build; by GCC 5.3.1 20160413)
FAILS:  [QPoint*] [QPoint/] [QPointF*] [QPointF/] [QSize*] [QSize/] [QSizeF*] [QSizeF/] [QMargins*] [QMargins/] [QTransform/] [QMatrix4x4/] [QVector2D/] [QVector3D/] [QVector4D/] [QQuaternion/]

Qt 5.6.2 (x86_64-little_endian-llp64 shared (dynamic) release build; by MSVC 2015)
FAILS:  [QPoint/] [QSize/]