Qt queued connection of custom object leads to runtime error - c++

Question

I am using Qt5.15.2.
I have a QObject used in my GUI and defined as below:
#pragma once
#include "actionstep.h"
#include "anotherthread.h"
#include <QTableWidget>
class TableWidget : public QTableWidget {
Q_OBJECT
public:
TableWidget(QWidget *parent = nullptr) : QTableWidget(4, 4, parent) {
int id = qRegisterMetaType<ActionStep::ActionStatusInfos>();
std::cout << id << std::endl;
connect(this, &TableWidget::SigUpdateActionStatusInfos, this,
&TableWidget::SlotUpdateActionStatusInfos,
Qt::ConnectionType::QueuedConnection);
th.start();
}
void methodCalledByAnotherThread(ActionStep::ActionStatusInfos ActionStepInfosObj)
{
emit SigUpdateActionStatusInfos(ActionStepInfosObj);
}
signals:
void SigUpdateActionStatusInfos(ActionStep::ActionStatusInfos as);
private slots:
void SlotUpdateActionStatusInfos(ActionStep::ActionStatusInfos as) {
}
private:
AnotherThread th;
};
The idea is to be able to send my custom object of type ActionStep::ActionStatusInfos through the signal/slot service.
Content of "actionstep.h", which contains my custom object:
#pragma once
#include <iostream>
#include <QMetaType>
class ActionStep {
public:
class ActionStatusInfos {
public:
// Default constructor
ActionStatusInfos() : Progress(0) {
}
// Default destructor
~ActionStatusInfos() = default;
// Copy constructor
ActionStatusInfos(ActionStatusInfos &source) {
SetProgress(source.GetProgress());
}
// Copy assignment
ActionStatusInfos &operator=(ActionStatusInfos &source) {
SetProgress(source.GetProgress());
return *this;
}
// move constructor
ActionStatusInfos(ActionStatusInfos &&source) noexcept
{
SetProgress(source.GetProgress());
}
//move assignment
ActionStatusInfos &operator=(ActionStatusInfos &&source) noexcept
{
SetProgress(source.GetProgress());
return *this;
}
void SetProgress(int pg) {
Progress = pg;
}
int GetProgress() {
return Progress;
}
private:
int Progress;
};
};
Q_DECLARE_METATYPE(ActionStep::ActionStatusInfos)
I've added both Q_DECLARE_METATYPE(ActionStep::ActionStatusInfos) and qRegisterMetaType<ActionStep::ActionStatusInfos>(), and my class seems to meet the minimum requirements needed by Qt for registering a custom class (default ctor, dtor and copy ctor).
At runtime, methodCalledByAnotherThread is called by a different thread than the GUI. After a few cycles, I get a SIGFAULT, and the debugger shows that there is a dangling reference when the Qt stuff is executed.
Am I missing something obvious?