error message for casting generic to incompatible type does not work properly with nested generics

[Book-reader]

def Test = List(<List(<List(<char>)>)>);


fn void main()
{
  (String)Test{}; // Error: It is not possible to cast 'Test' (List(<List>)) to 'String'.
}

it makes it harder to tell the actual type with the error as part of it is cut off

I think that this worked at some point?
edit: it doesn't seem like it ever did