1 // Here we check that it is allowed to lend out an element of a
2 // (locally rooted) mutable, unique vector, and that we then prevent
3 // modifications to the contents.
5 fn takes_imm_elt<F>(_v: &isize, f: F) where F: FnOnce() {
9 fn has_mut_vec_and_does_not_try_to_change_it() {
10 let mut v: Vec<isize> = vec![1, 2, 3];
11 takes_imm_elt(&v[0], || {})
14 fn has_mut_vec_but_tries_to_change_it() {
15 let mut v: Vec<isize> = vec![1, 2, 3];
18 || { //~ ERROR cannot borrow `v` as mutable