In the interactions window, trying to re-bind an identifier prompts the error "The declaration of x shadows a previous declaration of x", which could lead the reader to believe that the shadowing has occurred. I would instead prefer "The declaration of x would shadow a previous declaration of x", to make it clear that no changes occurred.
(a) let me know if you're not looking for this kind of issue report!
(b) let me know if this is something I'm likely to be able to make a PR for myself!