Description
With QSG_RHI_BACKEND=vulkan, the lancelot scenegrabber crashes when it tries to render the scene custommaterial/customscreentexture_unshaded.qml. See attached debugger log.
Bisecting showed that this issue started with commit 68b303746295b8f87f7d4ee0492212670a5522cb Add custom material editor: https://codereview.qt-project.org/c/qt/qtquick3d/+/383094