This code inside a scroll view is broken in 2 ways, but there are no warnings at all.

ScrollView {
       id: test2
       clip: false       ColumnLayout {
         // anchors.left: parent.left
         // anchors.right: parent.right
         // anchors.top: parent.top
        width: parent.width
..... 

1) Setting anchors in a Scrollview doesn't make sense and should throw a warning.

2) `width: parent.width` will not give the desired result–it will return test2.contentWidth.
The desired effect can be achieved with `width: test2.width`, but again, no warning is given.

In the case of a ScrollView, almost any setting referring to "parent" will be wrong, so a warning should be given. I can't think of anything off the top of my head, but I'm sure there are other Types that have similar behavior. (maybe ScrollLayout?)