I have a Rectangle inside a State.
I now know this is not possible and you must use PropertyChanges. However, this invalid code still caused the preview renders at the top of the Design view to display the Rectangle. I think it should not be displayed in the preview.

The Rectangle is not visible/clickable in the designer itself, and also isn't listed in the navigator.

On a side-note: maybe the Rectangle should be highlighted in the editor as invalid code? Or are there cases where this syntax IS valid?

import QtQuick 2.2

Rectangle {
	id: root
	width: 360
	height: 360

	states: [
		State {
			name: "someState"
			
			Rectangle {
				id: someRectangle
				x: 200
				y: 200
				width: 100
				height: 100
				color: "#ff0000"
				opacity: 1
			}
		}
	]
}