If struct A implements trait S and trait T, and there are two functions fn foo(x: &S); fn foo(y: &T); in scope, then the compiler needs you to disambi

If struct A implements trait S and trait T, and there are two functions fn foo(x: &S); fn foo(y: &T); in scope, then the compiler needs you to disambiguate foo(&a) if a: A. This isn't a whole lot different than disambiguating the same expression if the functions are: fn foo(x: &A); fn foo(x: &mut A);