qml application got crashed after adding chartview.

[NIvil Wilson]

sir,
qml application got crashed after adding chartview.
the code is given below.
main.qml

import QtQuick 2.12
import QtQuick.Window 2.12
import QtCharts 2.3

Window {
    visible: true
    width: 640
    height: 480
    title: qsTr("Hello World")

    ChartView {
        width: 400
        height: 300
        theme: ChartView.ChartThemeBrownSand
        antialiasing: true

        PieSeries {
            id: pieSeries
            PieSlice { label: "eaten"; value: 94.9 }
            PieSlice { label: "not yet eaten"; value: 5.1 }
        }
    }


}

.pro file

QT += quick charts

CONFIG += c++11

# The following define makes your compiler emit warnings if you use
# any Qt feature that has been marked deprecated (the exact warnings
# depend on your compiler). Refer to the documentation for the
# deprecated API to know how to port your code away from it.
DEFINES += QT_DEPRECATED_WARNINGS

# You can also make your code fail to compile if it uses deprecated APIs.
# In order to do so, uncomment the following line.
# You can also select to disable deprecated APIs only up to a certain version of Qt.
#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0

SOURCES += \
        main.cpp

RESOURCES += qml.qrc

# Additional import path used to resolve QML modules in Qt Creator's code model
QML_IMPORT_PATH =

# Additional import path used to resolve QML modules just for Qt Quick Designer
QML_DESIGNER_IMPORT_PATH =

# Default rules for deployment.
qnx: target.path = /tmp/$${TARGET}/bin
else: unix:!android: target.path = /opt/$${TARGET}/bin
!isEmpty(target.path): INSTALLS += target

Application output

19:19:54: Starting /home/nivilwilsonp/qt_workspace/build-untitled-Desktop_Qt_5_14_2_GCC_64bit-Debug/untitled ...
QML debugging is enabled. Only use this in a safe environment.
Warning: Ignoring XDG_SESSION_TYPE=wayland on Gnome. Use QT_QPA_PLATFORM=wayland to run on Wayland anyway.
19:19:55: The program has unexpectedly finished.
19:19:55: The process was ended forcefully.
19:19:55: /home/nivilwilsonp/qt_workspace/build-untitled-Desktop_Qt_5_14_2_GCC_64bit-Debug/untitled crashed.

[ODБOï]

@NIvil-Wilson hi

Please read the note under the example here https://doc.qt.io/qt-5/qtcharts-qmlmodule.html
Are you using QApplication or QGuiApplication ?

[NIvil Wilson]

@LeLev
sir,
sorry for my ignorance and thank you for helping me .i usually use offfline documentation for application develepmemt.