qmlsc: Problems with context properties

    QQmlApplicationEngine engine;
    engine.rootContext()->setContextProperty("TestObject", new TestObject());
    const QUrl url(QStringLiteral("qrc:/main.qml"));
    QObject::connect(&engine, &QQmlApplicationEngine::objectCreated,
                     &app, [url](QObject *obj, const QUrl &objUrl) {
        if (!obj && url == objUrl)
            QCoreApplication::exit(-1);
    }, Qt::QueuedConnection);
    engine.load(url);

import QtQuick 2.12
import QtQuick.Window 2.12

import QtQuick.Controls 2.3

import com.test 1.0

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

    Label {
        anchors.centerIn: parent
        text: "TestObject value: " + TestObject.value
    }
}

#include <QObject>
#include <QQmlEngine>

class TestObject : public QObject
{
    Q_OBJECT
    Q_PROPERTY(int value READ get_value CONSTANT FINAL)
public:
    explicit TestObject(QObject *parent = nullptr);

public Q_SLOTS:
    int get_value() const {
        return 10;
    }
};

08:30:00: Running steps for project sttest...
08:30:00: Starting: "C:\QtCommercial\Tools\CMake_64\bin\cmake.exe" --build C:/Users/dev/Desktop/Projects/test/build-sttest-Desktop_Qt_6_4_0_MSVC2019_64bit-Debug --target all
[1/21 29.3/sec] Generating com/test/main.qml
[2/21 51.5/sec] Generating .rcc/qmlcache/sttest_qmlcache_loader.cpp
[3/21 27.5/sec] Running qmlimportscanner for sttest
[4/21 10.8/sec] Automatic MOC and UIC for target sttest
[5/21 12.5/sec] Running AUTOMOC file extraction for target sttest
[6/21 14.7/sec] Running rcc for resource qmake_com_test
[7/21 16.8/sec] Running rcc for resource sttest_raw_qml_0
[8/21 18.5/sec] Automatic RCC for qml.qrc
[9/21 20.0/sec] Running moc --collect-json for target sttest
[10/21 18.8/sec] Automatic QML type registration for target sttest
[11/21 16.5/sec] Generating .rcc/qmlcache/sttest_main_qml.cpp
Warning: main.qml:4:1: Warnings occurred while importing module "QtQuick.Controls":
import QtQuick.Controls 2.3
^^^^^^
---
Warning: QtQuick.Controls uses optional imports which are not supported. Some types might not be found.
---

Info: main.qml:4:1: Unused import at main.qml:4:1
import QtQuick.Controls 2.3
^^^^^^
Warning: main.qml:16:38: Unqualified access
        text: "TestObject value: " + TestObject.value
                                     ^^^^^^^^^^
Error: main.qml:16:38: Could not compile binding for text: Cannot access value for name TestObject
        text: "TestObject value: " + TestObject.value
                                     ^^^^^^^^^^
[12/21 13.2/sec] Building CXX object CMakeFiles\sttest.dir\.rcc\qrc_sttest_raw_qml_0.cpp.obj
[13/21 14.3/sec] Building CXX object CMakeFiles\sttest.dir\.rcc\qrc_qmake_com_test.cpp.obj
[14/21 15.4/sec] Building CXX object CMakeFiles\sttest.dir\sttest_autogen\EWIEGA46WW\qrc_qml.cpp.obj
[15/21 7.1/sec] Building CXX object CMakeFiles\sttest.dir\sttest_qmltyperegistrations.cpp.obj
[16/21 7.2/sec] Building CXX object CMakeFiles\sttest.dir\sttest_autogen\mocs_compilation.cpp.obj
[17/21 7.7/sec] Building CXX object CMakeFiles\sttest.dir\testobject.cpp.obj
[18/21 7.7/sec] Building CXX object CMakeFiles\sttest.dir\main.cpp.obj
[19/21 7.9/sec] Building CXX object CMakeFiles\sttest.dir\.rcc\qmlcache\sttest_main_qml.cpp.obj
[20/21 7.7/sec] Building CXX object CMakeFiles\sttest.dir\.rcc\qmlcache\sttest_qmlcache_loader.cpp.obj
[21/21 7.7/sec] Linking CXX executable sttest.exe
08:30:03: The process "C:\QtCommercial\Tools\CMake_64\bin\cmake.exe" exited normally.
08:30:03: Elapsed time: 00:03.

#include <QObject>
#include <QQmlEngine>

class TestObject : public QObject
{
    Q_OBJECT
    QML_ELEMENT // This causes the "undefined" problem
    Q_PROPERTY(int value READ get_value CONSTANT FINAL)
public:
    explicit TestObject(QObject *parent = nullptr);

public Q_SLOTS:
    int get_value() const {
        return 10;
    }
};

08:28:18: Running steps for project sttest...
08:28:18: Starting: "C:\QtCommercial\Tools\CMake_64\bin\cmake.exe" --build C:/Users/dev/Desktop/Projects/test/build-sttest-Desktop_Qt_6_4_0_MSVC2019_64bit-Debug --target all
[1/21 31.1/sec] Generating com/test/main.qml
[2/21 47.7/sec] Generating .rcc/qmlcache/sttest_qmlcache_loader.cpp
[3/21 14.6/sec] Running qmlimportscanner for sttest
[4/21 11.2/sec] Automatic MOC and UIC for target sttest
[5/21 12.9/sec] Running AUTOMOC file extraction for target sttest
[6/21 15.2/sec] Running rcc for resource sttest_raw_qml_0
[7/21 17.7/sec] Running rcc for resource qmake_com_test
[8/21 19.3/sec] Automatic RCC for qml.qrc
[9/21 21.2/sec] Running moc --collect-json for target sttest
[10/21 19.9/sec] Automatic QML type registration for target sttest
[11/21 17.3/sec] Generating .rcc/qmlcache/sttest_main_qml.cpp
Warning: main.qml:4:1: Warnings occurred while importing module "QtQuick.Controls":
import QtQuick.Controls 2.3
^^^^^^
---
Warning: QtQuick.Controls uses optional imports which are not supported. Some types might not be found.
---

Info: main.qml:4:1: Unused import at main.qml:4:1
import QtQuick.Controls 2.3
^^^^^^
Warning: main.qml:16:49: Property "value" not found on type "TestObject"
        text: "TestObject value: " + TestObject.value
                                                ^^^^^
Error: main.qml:16:49: Could not compile binding for text: Cannot load property value from const QMetaObject of const QMetaObject.
        text: "TestObject value: " + TestObject.value
                                                ^^^^^
[12/21 13.9/sec] Building CXX object CMakeFiles\sttest.dir\.rcc\qrc_sttest_raw_qml_0.cpp.obj
[13/21 15.0/sec] Building CXX object CMakeFiles\sttest.dir\.rcc\qrc_qmake_com_test.cpp.obj
[14/21 16.2/sec] Building CXX object CMakeFiles\sttest.dir\sttest_autogen\EWIEGA46WW\qrc_qml.cpp.obj
[15/21 6.9/sec] Building CXX object CMakeFiles\sttest.dir\testobject.cpp.obj
[16/21 7.3/sec] Building CXX object CMakeFiles\sttest.dir\sttest_autogen\mocs_compilation.cpp.obj
[17/21 7.6/sec] Building CXX object CMakeFiles\sttest.dir\sttest_qmltyperegistrations.cpp.obj
[18/21 7.6/sec] Building CXX object CMakeFiles\sttest.dir\main.cpp.obj
[19/21 7.9/sec] Building CXX object CMakeFiles\sttest.dir\.rcc\qmlcache\sttest_main_qml.cpp.obj
[20/21 7.8/sec] Building CXX object CMakeFiles\sttest.dir\.rcc\qmlcache\sttest_qmlcache_loader.cpp.obj
[21/21 7.8/sec] Linking CXX executable sttest.exe
08:28:21: The process "C:\QtCommercial\Tools\CMake_64\bin\cmake.exe" exited normally.
08:28:21: Elapsed time: 00:03.