WebEngineNewViewRequest crash on recursive openIn() call.

I need to open popup in the same view, but it cause a crash.

Steps to reproduce:
1) Open "Quick Nano browser" example
2) Insert "request.openIn(webEngineView); return" into BrowserWindow.qml:322 (the insertion should be done in the first line of the onNewViewRequested handler).
3) Run the example
4) Open a page with popups. (scroll down on the default page (qt.io) and click on "Like" or "Follow" button on the right)
5) Click on any link leads to crash in libQt5WebEngineCore module.

I've managed to get a backtrace. Added as attachment.