Grab() function of QQuickView would crash on android

[stereomatching]

mac OS X 10.8.5
Qt5.2

tried api 10,14,15,19
compile with armeabi

error message
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&#40;QStringLiteral("qml/androidTest/main.qml"&#41;&#41;;
viewer.showExpanded();

return app.exec&#40;&#41;;

}

@

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()
    }
}    

}

@