5 fn f<T>(data: &[T]) -> impl Iterator<Item = Vec> {
6 //~^ ERROR: missing generics for struct `Vec` [E0107]
7 iter::empty() //~ ERROR: type annotations needed [E0282]
10 fn g<T>(data: &[T], target: T) -> impl Iterator<Item = Vec<T>> {
11 //~^ ERROR: type annotations needed [E0282]
12 f(data).filter(|x| x == target)