On windows text copied to the clipboard is lost when application quits

    if iswindows:
        def exec_(self):
            try:
                return QApplication.exec_()
            finally:
                try:
                    if self.clipboard().ownsClipboard():
                        import ctypes
                        ctypes.WinDLL('ole32.dll').OleFlushClipboard()
                except Exception:
                    import traceback
                    traceback.print_exc()