The gui application crashes straightaway, no gui comes up. The gui is just one window with a couple of buttons and a space to show images.

The main entry is this:

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    MainWindow w;
    w.show();

    return a.exec();
}

The crash occurs in the moc generated code for setupUI:

void setupUi(QMainWindow *MainWindow)
    {
        if (MainWindow->objectName().isEmpty())
            MainWindow->setObjectName(QStringLiteral("MainWindow"));
        MainWindow->resize(905, 587);
        MainWindow->setMinimumSize(QSize(0, 340));
        actionQuit = new QAction(MainWindow);
        actionQuit->setObjectName(QStringLiteral("actionQuit"));
        centralWidget = new QWidget(MainWindow);
        centralWidget->setObjectName(QStringLiteral("centralWidget"));
        verticalLayout = new QVBoxLayout(centralWidget);
        verticalLayout->setSpacing(6);
        verticalLayout->setContentsMargins(11, 11, 11, 11);
        verticalLayout->setObjectName(QStringLiteral("verticalLayout"));
        widgetScreen = new ImageView(centralWidget);
        widgetScreen->setObjectName(QStringLiteral("widgetScreen"));
        QSizePolicy sizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
        sizePolicy.setHorizontalStretch(0);
        sizePolicy.setVerticalStretch(0);
        sizePolicy.setHeightForWidth(widgetScreen->sizePolicy().hasHeightForWidth());
        widgetScreen->setSizePolicy(sizePolicy);

        verticalLayout->addWidget(widgetScreen);

        checkBoxFlipRegistration = new QCheckBox(centralWidget);
        checkBoxFlipRegistration->setObjectName(QStringLiteral("checkBoxFlipRegistration"));
        checkBoxFlipRegistration->setToolTipDuration(-1);

        verticalLayout->addWidget(checkBoxFlipRegistration);

        horizontalLayout = new QHBoxLayout();
        horizontalLayout->setSpacing(6);
        horizontalLayout->setObjectName(QStringLiteral("horizontalLayout"));
        horizontalLayout->setContentsMargins(-1, 0, -1, -1);
        pushButtonLoad = new QPushButton(centralWidget);
        pushButtonLoad->setObjectName(QStringLiteral("pushButtonLoad"));

        horizontalLayout->addWidget(pushButtonLoad);

        horizontalSpacer = new QSpacerItem(80, 20, QSizePolicy::Minimum, QSizePolicy::Minimum);

        horizontalLayout->addItem(horizontalSpacer);

        ///////////////////////////////////////////////////////////////////////
        // APPLICATION CRASHES HERE
        pushButtonDesine = new QPushButton(centralWidget);
        pushButtonDesine->setObjectName(QStringLiteral("pushButtonDesine"));

        horizontalLayout->addWidget(pushButtonDesine);

        pushButtonExport = new QPushButton(centralWidget);
        pushButtonExport->setObjectName(QStringLiteral("pushButtonExport"));

        horizontalLayout->addWidget(pushButtonExport);


        verticalLayout->addLayout(horizontalLayout);

        MainWindow->setCentralWidget(centralWidget);
        menuBar = new QMenuBar(MainWindow);
        menuBar->setObjectName(QStringLiteral("menuBar"));
        menuBar->setGeometry(QRect(0, 0, 905, 21));
        menuFile = new QMenu(menuBar);
        menuFile->setObjectName(QStringLiteral("menuFile"));
        MainWindow->setMenuBar(menuBar);
        statusBar = new QStatusBar(MainWindow);
        statusBar->setObjectName(QStringLiteral("statusBar"));
        MainWindow->setStatusBar(statusBar);

        menuBar->addAction(menuFile->menuAction());
        menuFile->addAction(actionQuit);

        retranslateUi(MainWindow);
        QObject::connect(actionQuit, SIGNAL(triggered()), MainWindow, SLOT(close()));

        QMetaObject::connectSlotsByName(MainWindow);
    }

I've seen similar problems occur when I have failed to initialize my objects correctly, but in those cases I would see a crash in the Release build whether I ran it from the debugger or standalone. It doesn't look like an OpenCV debug/release issue as we don't even get to code that loads that library.

Does anyone have any thoughts on what to do next? I'm stumped.

Thanks!