QOpenGLWidget crash on destructor call

TinTin82

Hi,

i have a instance of a class derivated from QOpenGLWidget. Every time the destructor is called the application crashes.

QOpenGLWidget::~QOpenGLWidget()
{
    makeCurrent(); // <- Here the Crash happens
}

If i go deeper into the callstack ist stopps at:

QOpenGLWidget::~QOpenGLWidget()->
void QOpenGLWidget::makeCurrent()->
bool QOpenGLContext::makeCurrent(QSurface *surface)->
QOpenGLContext *QOpenGLContextPrivate::setCurrentContext(QOpenGLContext *context)->
localData()->
T *&qThreadStorage_localData(QThreadStorageData &d, T **)->
void **QThreadStorageData::get() const
{
    QThreadData *data = QThreadData::current();
    if (!data) {
        qWarning("QThreadStorage::get: QThreadStorage can only be used with threads started with QThread");
        return 0;
    }
    QVector<void *> &tls = data->tls;
    if (tls.size() <= id) // <- here
}

Anyone a idea what happens here ??

Best regards,
TinTin

TinTin82

Okay, i have the Problem

the "this" pointer of QOpenGLContextPrivate instance has been the NULL pointer.
On Accessing QThreadStorageData::id the Crash happens.

The This pointer was Zero because i used a static holder for all my instances. But i hold the QApplication in the stack.

int main(int argc, char *argv[])
{
	int retVal;

	// Make a singleton instance of QApplication
    int argc_=0;
	QApplication app(argc_,(char **)NULL);
	// Then allocate the Holder within all other QtWidgets but OsTimer and Application Scheduler
	GLOBAL_HOLDER_INSTANCE = Holder::getInstance();
...

And the holder was singleton:

Holder::getInstance()
{
     static Holder Instance;
     return &Instance;
}

So i deleted the QApplication bevor deleting the other instances....

So it was not to solve within the Information i posted here.

Best regards TinTin