Error messages give no "backtrace" from components to instances.

Given:

Text {
    property variant a
    text: a.text
}

Text { text: "bar" }

This code has an error that Foo::a is expected to be an object, yet 25 is being assigned:

import Qt 4.7
Row {
    Foo { a: 25 } // Actual mistake is here
    Foo { a: Bar { } } // Mistake is not here
}

However, the error produced is relative to Foo.qml, not Test.qml (where the error occurs):

Foo.qml:5: Unable to assign [undefined] to QString text

Would it be possible to give a "back trace" in such cases:

In Foo instantiated at Test.qml:3:
Foo.qml:5: Unable to assign [undefined] to QString text

(in the example, changing the property to QtObject is sufficient in this case, but that's not always possible)