I have a problem with passing Q_PROPERTY as QVariantMap to QML - Segmentation fault.
I created simple app to show the problem.
When I'm using compiler MinGW 11.2 everything is fine, but the problem is under Clang 15.0.4.
I have installed Clang by msys2 mingw-w64-x86_64-clang and mingw-w64-clang-x86_64-toolchain. Installing mingw-w64-clang-x86_64-qt6 also didn't help.
Kit:
Compiler:
Error:
Code:
main.cpp
#include "TestClass.h"
#include <QGuiApplication>
#include <QQmlApplicationEngine>
#include <QQmlContext>
int main(int argc, char *argv[]) {
QGuiApplication app(argc, argv);
QQmlApplicationEngine engine;
TestClass t;
engine.rootContext()->setContextProperty("testClass", &t);
const QUrl url(u"qrc:/QuickUI/qml/main.qml"_qs);
QObject::connect(
&engine, &QQmlApplicationEngine::objectCreated, &app,
[url](QObject *obj, const QUrl &objUrl) {
if (!obj && url == objUrl)
QCoreApplication::exit(-1);
},
Qt::QueuedConnection);
engine.load(url);
return app.exec();
}
TestClass.cpp
#pragma once
#include <QObject>
#include <QVariantMap>
#include <QDebug>
class TestClass : public QObject {
Q_OBJECT
Q_PROPERTY(QVariantMap testMap MEMBER testMap NOTIFY testMapChanged)
Q_PROPERTY(QString testStr MEMBER testStr NOTIFY testMapChanged)
public:
TestClass() : QObject() {}
QVariantMap testMap;
QString testStr = "test";
Q_INVOKABLE void start() {
qDebug() << "Kliknalem";
testMap.insert("t1", "Mam 1");
testMap.insert("t2", "Mam 2");
emit testMapChanged();
}
signals:
void testMapChanged();
};
main.qml
import QtQuick
import QtQuick.Layouts
import QtQuick.Controls
Window {
width: 640
height: 480
visible: true
title: qsTr("Hello World")
Rectangle {
anchors.fill: parent
color: "#FFFFFF"
}
ColumnLayout {
anchors.top: parent.top
anchors.left: parent.left
anchors.margins: 20
spacing: 20
Button {
Layout.preferredHeight: 30
Layout.fillWidth: true
text: "Klik"
onClicked: {
testClass.start();
}
}
Text {
text: testClass.testStr
}
Text {
text: testClass.testMap.t1
}
Text {
text: testClass.testMap.t2
}
}
}
Stack:
1 QV4::ExecutionEngine::newIdentifier
2 variantMapToJS
3 QV4::ExecutionEngine::fromData
4 QV4::ExecutionEngine::fromVariant
5 loadProperty
6 QV4::Moth::VME::interpret
7 QV4::Moth::VME::exec
8 QV4::Function::call
9 QQmlJavaScriptExpression::evaluate
10 QQmlBinding::evaluate
11 QQmlNonbindingBinding::doUpdate
12 QQmlBinding::update
13 QQmlNotifier::emitNotify
14 doActivate<false>
15 TestClass::start()
16 TestClass::qt_metacall(QMetaObject::Call, int, void * *)
17 QQmlObjectOrGadget::metacall
18 CallMethod
19 CallPrecise
20 operator()
21 operator()<QV4::QObjectMethod::callInternal(const QV4::Value *, const QV4::Value *, int) const::<lambda()>>
22 QV4::QObjectMethod::callInternal
23 QV4::FunctionObject::call
24 QV4::Moth::VME::interpret
25 QV4::Moth::VME::exec
26 QV4::Function::call
27 operator()
28 QV4::convertAndCall<QV4::Function::call(QObject *, void * *, const QMetaType *, int, QV4::ExecutionContext *)::<lambda(const QV4::Value *, const QV4::Value *, int)>>
29 QV4::Function::call
30 QQmlJavaScriptExpression::evaluate
31 QQmlBoundSignalExpression::evaluate
32 QQmlBoundSignal_callback
33 QQmlNotifier::emitNotify
34 doActivate<false>
35 QMetaObject::activate
36 QQuickAbstractButton::doubleClicked
37 QQuickAbstractButtonPrivate::handleRelease
38 QQuickControl::mouseReleaseEvent
39 QQuickItem::event
40 QCoreApplication::notifyInternal2
41 QCoreApplication::sendEvent
42 QQuickDeliveryAgentPrivate::deliverMatchingPointsToItem
43 QQuickDeliveryAgentPrivate::deliverUpdatedPoints
44 QQuickDeliveryAgentPrivate::deliverPointerEvent
45 QQuickDeliveryAgentPrivate::handleMouseEvent
46 QQuickDeliveryAgent::event
47 QQuickWindow::event
48 QCoreApplication::notifyInternal2
49 QCoreApplication::sendSpontaneousEvent
50 QGuiApplicationPrivate::processMouseEvent
51 QWindowSystemInterface::sendWindowSystemEvents
52 QEventDispatcherWin32::processEvents
53 QWindowsGuiEventDispatcher::processEvents
54 QEventLoop::processEvents
55 QEventLoop::exec
56 QCoreApplication::exec
57 qMain(int, char * *)
58 WinMain
59 main
60 __tmainCRTStartup
61 WinMainCRTStartup
