Class <DMainWindow> causes crash when executing close() on pgw devices

[uniontechzhangsong]

SUMMARY | 问题概要

Here is my method to reproduce the problem:
create 3 windows inherited from DMainWindow, each window contains a webengineview and open the web page, crash after closing any window; keep the code unchanged, just change the inherited DMainWindow to inherit QMainWindow, and close the windows in turn without the related crash phenomenon.

DTK and OS VERSIONS | DTK&系统版本信息

Device: HUAWEI QingYun W525 PGUW-WBX0 Desktop Computer
OS: UnionTech OS Desktop 20 Professional Linux version 4.19.90-arm64-desktop #1.1.9-uos SMP PREEMPT Mon May 15 20:48:14 CST 2023
Processor: PANGU M900 (octa-core / octa-logic processor)
Motherboard: SP1PGUWM
Memory: 8GB (DDR4 3195 MT/s)
Display Adapter: PANGU M900 Intergrated Graphics
Audio Adapter: OnBoard Audio
Storage Device: KXG60ZNV256G TOSHIBA (256 GB)
Network adapter: Ethernet interface
Mouse: Optical Mouse (Pixart Imaging Optical Mouse)
Keyboard: USB Keyboard (China Resource Semico USB Keyboard)
Display device: Monitor VSC (23.8 inches (53cm X 29cm))
CD-ROM drive: DVD A DU8AENH
Qt-version: 5.11.3
Libdtkwidget: 5.5.62

Minimal Reproducible Case Code | 最小复现案例代码

class MainWindow : public DMainWindow
{
Q_OBJECT

public:
explicit MainWindow(QWidget *parent = nullptr);
};

MainWindow::MainWindow(QWidget *parent)
: DMainWindow(parent)
{
setMinimumSize(QSize(960, 620));

QWebEngineView *webView = new QWebEngineView(this);
webView->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);

webView->load(QUrl(DEFAULT_URL));
setCentralWidget(webView);

}

int main(int argc, char *argv[])
{
qputenv("QTWEBENGINE_CHROMIUM_FLAGS", "--disable-gpu");

QApplication a(argc, argv);

QSurfaceFormat format;
format.setRenderableType(QSurfaceFormat::OpenGLES);
format.setDefaultFormat(format);

MainWindow w;
w.show();

MainWindow w2;
w2.show();

MainWindow w3;
w3.show();

return a.exec();

}

OBSERVED RESULT | 观察到的结果

 each window contains a webengineview and open the web page, crash after closing any window; keep the code untouched, just change the inherited DMainWindow to inherit QMainWindow, and close the windows in turn without the related crash phenomenon. 

EXPECTED RESULT | 期望的结果

I hope it will be as stable as QMainwindow on pgw

ADDITIONAL INFORMATION | 额外补充

pms link contains the demo I uploaded:
https://pms.uniontech.com/bug-view-202401.html

[kegechen]

客户端缓存，避免缓存重复释放导致的闪退。和 DMainWIndow 无关