Self-referential properties should perhaps error, or at least warn

import QtQuick 2.6

Item {
    property bool test: test
}

This code runs without errors, which seems a little bad. It's very easy to make a mistake like this (in a more complex setting) with copy/paste mistakes, or ID usage, or similar.

I think that any property that refers to its own value is probably rather suspect, and potentially an error.