When closing application Exception Triggered.

[SPlatten]

@mrjj , at the moment the application is in very early stages for the MainWindow class contains just:

DataSets* mpDataSetsDlg;
Ui::MainWindow* mpui;

In the constructor:

MainWindow::MainWindow(QWidget* pParent) : QMainWindow(pParent),
                                           mpDataSetsDlg(nullptr),
                                           mpui(new Ui:MainWindow)
{
    mpui->setupUi(this);
    connect(mpui->btnDataSets, &QPushButton->clicked,
            this, &MainWindow::dataSetsBtnClicked);
}    

In the destructor:

void MainWindow::~MainWindow()
{
    if ( mpDataSetsDlg != nullptr )
    {
        delete mpDataSetsDlg;
        mpDataSetsDlg = nullptr;
    }
    delete mpui;
    mpui = nullptr;
}

[JonB]

@SPlatten
Remove all your #includes, other than what is required to get a minimal Qt program open a main window. It should be 10 lines long. No Trainer object No Trainer include files. Does it work?

If your program only crashes with Trainer and its include files, I still don't understand what we can say since we don't even know what it is.

[SPlatten]

@JonB , I modified main.cpp to:

#include <QApplication> //Add this
#include "main window.h"
//#include "trainer.h"

int main(int argc, char* argv[])
{
    //Trainer trainer(argc, argv);
    QApplication a(argc, argv);
    MainWindow w;
    w.show();
    return a.exec();
    //return trainer.exec();
}

Rebuilt and it does exactly the same, crash location is in exactly the same place.

[J.Hilk]

@SPlatten well, in the stack trace, what's the first entry, thats from your code ?

you know that you can step back, when you're in assembler code right?

[JonB]

@SPlatten
Remove #include "main window.h" and replace MainWindow w; by QMainWindow w; (with presumably #include <QMainWindow>).

If that does not work, since it is the minimal Qt application what has changed for you since you last successfully built/ran any Qt GUI program?

[SPlatten]

@JonB , to be honest, it could be the build of the laptop, its an older version of Qt:

Qt Creator 4.4.1
Based on Qt 5.9.2 (MSVC 2015, 32 bit)

I have no control over the laptop or the version of Qt being used, this is supplied by the company I am contracted to.

[SPlatten]

@J-Hilk , I've expanded the stack trace and there is no call the traces back to my source, the first call is in Function: RtlGetAppContainerNamedObjectPath, File: ntdll

[J.Hilk]

@SPlatten thats unfortunate

since this is a basic and small project so far, can you share, the minimal example ?

that means probably only your custom MainWindow, so we can check ourselves, and check it against different Qt versions as well

[JonB]

@J-Hilk
That is why I suggested @SPlatten should use QMainWindow, not his own MainWindow, to test. If that still does not work (I'm not sure if he has answered that), then something is fundamentally with his Qt/environment. I would do that before examining anything about a custom MainWindow or header file.

[SPlatten]

@J-Hilk , in doing this, I decided to go one better. I did the following in Qt Creator:

1. Clicked on File top line menu
2. Selected New File or Project...
3. Selected Application and Qt Widgets Application
4. Clicked on the Choose... button
5. Entered test into Name: text box and clicked the Next button
6. Checked only Desktop Qt 5.9.2 MSVC2015 32bit in Kit Selection
7. Clicked Next button
8. Clicked Next button
9. Clicked Finish button
10. Right clicked project and selected Rebuild
11. Run application in debug mode and clicked the close widget in the MainWindow

Same thing happens, application stops and Exception Triggered dialog is displayed.

[JoeCFD]

@SPlatten Is it a 32bit bug? Try to make a 64bit build to see if you have the same problem.

[SPlatten]

@JoeCFD , thank you, thats a shame, the problem is the target is 32 bit so regardless of if it works in 64 bit, thats not an option.

[JoeCFD]

@SPlatten That is unlucky. Install a 32 bit debug build of Qt 5.9.2 and debug into qt code to see the cause.

[SPlatten]

@JoeCFD , sorry I just don't have the time.