Unable to assign [undefined] to double error when using PathAttributes with PathView

Suppose a Path containing PathAttributes e.g.

PathAttribute

{ name: "myValue"; value: 0}

PathAttribute

{ name: "myValue"; value: 1000}

and suppose a text delegate which should show the "myValue" property value:

delegate: Text

{ text: PathView.myValue }

the text value is indeed assigned, but application outputs:

Unable to assign [undefined] to QString

where the [undefined] refers to the attached property.

Of course, as the list is moved around, more errors are produced even though there doesn't seem to have been a failure.