WebEngineView segmentation fault on a simple example

Anything that utilizes WebEngineView constantly crashes (100% of the times) with some apps, including the default projects created with QtCreator (those are based on `QQmlApplicationEngine` and `QGuiApplication`), and the bundled `qml` binary (about that one I was told that a sigsegv is expected, though).

`qmlscene` somewhy works without crashes. What is the difference between those, btw? Perhaps this could point to a workaround?

Code to test this could be taken from here: http://doc.qt.io/qt-5/qml-qtwebengine-webengineview.html#loading-web-pages , for an example. Just save it to a `test.qml` file and launch with `qml test.qml`.

This happens consistently on different platforms.