XCB: Memory leak of QXcbScrollingDevicePrivate for a device that is not a mouse

==1585319== 1,112 (720 direct, 392 indirect) bytes in 2 blocks are definitely lost in loss record 110 of 123
==1585319==    at 0x483EF2F: operator new(unsigned long) (in /usr/libexec/valgrind/vgpreload_memcheck-amd64-linux.so)
==1585319==    by 0x7D01D6C: QXcbConnection::xi2SetupSlavePointerDevice(void*, bool, QPointingDevice*)::{lambda()#1}::operator()() const (qxcbconnection_xi2.cpp:262)
==1585319==    by 0x7D025C2: QXcbConnection::xi2SetupSlavePointerDevice(void*, bool, QPointingDevice*) (qxcbconnection_xi2.cpp:316)
==1585319==    by 0x7D03D2D: QXcbConnection::xi2SetupDevices() (qxcbconnection_xi2.cpp:499)
==1585319==    by 0x7CE81A3: QXcbConnection::QXcbConnection(QXcbNativeInterface*, bool, unsigned int, char const*) (qxcbconnection.cpp:105)
==1585319==    by 0x7D27BEA: QXcbIntegration::QXcbIntegration(QList<QString> const&, int&, char**) (qxcbintegration.cpp:199)
==1585319==    by 0x7C9D282: QXcbIntegrationPlugin::create(QString const&, QList<QString> const&, int&, char**) (qxcbmain.cpp:56)
==1585319==    by 0x4B516DE: QPlatformIntegration* qLoadPlugin<QPlatformIntegration, QPlatformIntegrationPlugin, QList<QString> const&, int&, char**&>(QFactoryLoader const*, QString const&, QList<QString> const&, int&, char**&) (qfactoryloader_p.h:108)
==1585319==    by 0x4B512A9: QPlatformIntegrationFactory::create(QString const&, QList<QString> const&, int&, char**, QString const&) (qplatformintegrationfactory.cpp:71)
==1585319==    by 0x4B074EC: init_platform(QString const&, QString const&, QString const&, int&, char**) (qguiapplication.cpp:1209)
==1585319==    by 0x4B0A646: QGuiApplicationPrivate::createPlatformIntegration() (qguiapplication.cpp:1491)
==1585319==    by 0x4B0A7C9: QGuiApplicationPrivate::createEventDispatcher() (qguiapplication.cpp:1508)
==1585319==    by 0x568853F: QCoreApplicationPrivate::init() (qcoreapplication.cpp:847)
==1585319==    by 0x4B0A89F: QGuiApplicationPrivate::init() (qguiapplication.cpp:1532)
==1585319==    by 0x4B05D16: QGuiApplication::QGuiApplication(int&, char**, int) (qguiapplication.cpp:653)
==1585319==    by 0x451613: main (tst_qmetatype.cpp:2141)

qt.qpa.input.devices: input device  "Wacom HID 48EE Pen stylus" ID 13
qt.qpa.input.devices:    has 8 buttons
qt.qpa.input.devices:    it's a keyboard
qt.qpa.input.devices:    has valuator "Abs X" recognized? true
qt.qpa.input.devices:    has valuator "Abs Y" recognized? true
qt.qpa.input.devices:    has valuator "Abs Pressure" recognized? true
qt.qpa.input.devices:    has valuator "Abs Tilt X" recognized? true
qt.qpa.input.devices:    has valuator "Abs Tilt Y" recognized? true
qt.qpa.input.devices:    has valuator "Abs Wheel" recognized? true
qt.qpa.input.devices:    it's a tablet with pointer type "pen"
qt.qpa.input.devices: register QPointingDevice("Wacom HID 48EE Pen stylus" Stylus id=d seat=30002 ptrType=Pen caps=Position|Pressure|MouseEmulation|Hover|XTilt|YTilt uniqueId=0)
qt.qpa.input.devices:    it's a scrolling device

$ xinput list-props 13
Device 'Wacom HID 48EE Pen stylus':
        Device Enabled (178):   1
        Coordinate Transformation Matrix (180): 1.000000, 0.000000, 0.000000, 0.000000, 1.000000, 0.000000, 0.000000, 0.000000, 1.000000
        Device Accel Profile (312):     0
        Device Accel Constant Deceleration (313):       1.000000
        Device Accel Adaptive Deceleration (314):       1.000000
        Device Accel Velocity Scaling (315):    10.000000
        Device Node (304):      "/dev/input/event14"
        Wacom Tablet Area (345):        0, 0, 28800, 18000
        Wacom Rotation (346):   0
        Wacom Pressurecurve (347):      0, 0, 100, 100
        Wacom Serial IDs (348): 18670, 0, 2, 0, 0
        Wacom Serial ID binding (349):  0
        Wacom Proximity Threshold (350):        30
        Wacom Pressure Threshold (351): 27
        Wacom Sample and Suppress (352):        2, 4
        Wacom Enable Touch (353):       0
        Wacom Hover Click (354):        1
        Wacom Enable Touch Gesture (355):       0
        Wacom Touch Gesture Parameters (356):   0, 0, 250
        Wacom Tool Type (357):  "STYLUS" (338)
        Wacom Button Actions (358):     "Wacom button action 0" (359), "Wacom button action 1" (360), "Wacom button action 2" (361), "None" (0), "None" (0), "None" (0), "None" (0), "Wacom button action 3" (362)
        Wacom button action 0 (359):    1572865
        Wacom button action 1 (360):    1572866
        Wacom button action 2 (361):    1572867
        Wacom button action 3 (362):    1572872
        Wacom Pressure Recalibration (363):     1
        Wacom Panscroll Threshold (364):        1300
        Device Product ID (305):        1386, 18670
        Wacom Log Mask (365):   0
        Wacom Debug Levels (366):       0, 0