added a test to make sure struct/dc signals an error when getting an impersonator contract on an immutable field that has no dependencies
added a test to make sure struct/dc signals an error when getting an impersonator
contract on an immutable field that has no dependencies

mafagafogigante/racket,mafagafogigante/racket,mafagafogigante/racket,mafagafogigante/racket,mafagafogigante/racket,mafagafogigante/racket,mafagafogigante/racket,mafagafogigante/racket,mafagafogigante/racket