terminate called without an active exception

[steven.hou]

Hi, I am working on eglfs with qt-everywhere-opensource-src-5.9.7. I got a terminate error which can be simulated by a sample. It works fine on linuxfb. Is it a bug on eglfs?
I find it crash at "if (!surface->surfaceHandle())" of makeCurrent in qtbase/src/gui/kernel/qopenglcontext.cpp.

Here is the error message:
pure virtual method called
terminate called without an active exception
Aborted

Here is the sample code:
#include <QApplication>
#include <QtWidgets>

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

QWidget *m_lpFirstTmpWindow;
m_lpFirstTmpWindow = new QWidget();
m_lpFirstTmpWindow->show();
m_lpFirstTmpWindow->hide();

QWidget *m_lpSecondTmpWindow;
m_lpSecondTmpWindow = new QWidget();
m_lpSecondTmpWindow->show();

delete m_lpFirstTmpWindow;
m_lpFirstTmpWindow = NULL;

return a.exec();

}

[gde23]

You should use deleteLater() instead of delete for QWidgets which will delete them after the eventLoop is done.

[steven.hou]

Still error with deleteLater(). Maybe I have to keep the m_lpFirstTmpWindow. But I am confused why it works fine on linuxfb.