grab() function of QQuickView would crash on android

F/libc    (30728): Fatal signal 11 (SIGSEGV) at 0x00000004 (code=1), thread 30752 (ple.androidTest)

.hpp
@
#ifndef SCREENCAPTURE_HPP
#define SCREENCAPTURE_HPP

#include <QObject>

class QQuickView;

class screenCapture : public QObject
{
    Q_OBJECT
public:    
    explicit screenCapture(QQuickView *parent = 0);
    screenCapture& operator=(screenCapture const&) = delete;
    screenCapture(screenCapture const&) = delete;
    
    Q_INVOKABLE void capture();

private:
    //QtQuick2ApplicationViewer *currentView_;
    QQuickView *currentView_;

    QString previous_name_;
    
};

#endif // SCREENCAPTURE_HPP
@

.cpp
@
#include <QQuickView>

#include "screenCapture.hpp"

screenCapture::screenCapture(QQuickView *parent) :
    QObject(nullptr), currentView_(parent)
{
}

/**
 * @brief capture screen
 */
void screenCapture::capture()
{
    currentView_->grabWindow();
}
@

main.cpp
@
#include <QtGui/QGuiApplication>
#include "qtquick2applicationviewer.h"

#include <QQuickPaintedItem>

#include "screenCapture.hpp"

int main(int argc, char *argv[])
{
    QGuiApplication app(argc, argv);

    qmlRegisterType<screenCapture>("ScreenCapture", 1, 0, "ScreenCap");

    QtQuick2ApplicationViewer viewer;
    viewer.setMainQmlFile(QStringLiteral("qml/androidTest/main.qml"));
    viewer.showExpanded();

    return app.exec();
}

@

main.qml
@
import QtQuick 2.0

import ScreenCapture 1.0

Rectangle {
    width: 360
    height: 360

    ScreenCap{id: cap}

    MouseArea {
        id: mouseArea

        anchors.fill: parent

        onClicked: {
            cap.capture()
        }
    }    
}