error.badfetch on non existent root document

Hello,

I have a question about where the error.badfetch is thrown and caught when a called document has non existent root document.

Take the following scenario.
The document 1 makes a transition to document 2 whose root document does not exist.
document 1 and document 2 have error.badfetch handler at the document level.
Where is the error supposed to be caught?

I think the question could be the same for the following assertion: 
If a document's application attribute refers to a document that also has an application attribute specified, an error.semantic event is thrown. 

Thanks,

Arnaud.