QWebEngineView & QMacCocoaViewContainer crash

#include <QtCore>
#include <QtWidgets>
#include <QMacCocoaViewContainer>
#include <QWebEngineView>

int main(int argc, char * argv[])
{
    QApplication app(argc, argv);
    
    QMainWindow mainWindow;
    QWebEngineView *browser = new QWebEngineView;
    QMacCocoaViewContainer *container = new QMacCocoaViewContainer(0);
      
    QSplitter *splitter = new QSplitter;
    splitter->addWidget(browser);
    splitter->addWidget(container);
    mainWindow.setCentralWidget(splitter);
    mainWindow.show();
    
    return app.exec();
}

#include <QtCore>
#include <QtWidgets>
#include <QMacCocoaViewContainer>
#include <QWebEngineView>

#include <AppKit/AppKit.h>

class CocoaViewContainer : public QMacCocoaViewContainer
{
public:
    CocoaViewContainer(QWidget *parent = 0);
};	// CocoaViewContainer

CocoaViewContainer::CocoaViewContainer(QWidget *parent)
: QMacCocoaViewContainer(0, parent)
{
    setAttribute(Qt::WA_DontCreateNativeAncestors);
    
    NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
    
    NSView *videoView = [[NSView alloc] init];
    setCocoaView(videoView);
    
    [videoView release];
    [pool release];
}


int main(int argc, char * argv[])
{
    qputenv("QT_MAC_WANTS_LAYER", "1");
    
    QApplication app(argc, argv);
    QCoreApplication::setAttribute(Qt::AA_DontCreateNativeWidgetSiblings, true);
   
    QMainWindow mainWindow;
    
    QWebEngineView *browser = new QWebEngineView;
    //browser->setAttribute(Qt::WA_DontCreateNativeAncestors);
    CocoaViewContainer *container = new CocoaViewContainer;
    
    QSplitter *splitter = new QSplitter(Qt::Vertical);    
    splitter->addWidget(container);
    splitter->addWidget(browser);
    splitter->setSizes({0, 100});
    mainWindow.setCentralWidget(splitter);
    mainWindow.show();
    
    return app.exec();
}