1 error[E0277]: cannot add `Vec<B>` to `()`
2 --> $DIR/issue-2149.rs:8:33
4 LL | for elt in self { r = r + f(*elt); }
5 | ^ no implementation for `() + Vec<B>`
7 = help: the trait `Add<Vec<B>>` is not implemented for `()`
9 error[E0599]: no method named `bind` found for array `[&str; 1]` in the current scope
10 --> $DIR/issue-2149.rs:13:12
12 LL | ["hi"].bind(|x| [x] );
13 | ^^^^ method not found in `[&str; 1]`
15 = help: items from traits can only be used if the trait is implemented and in scope
16 note: `VecMonad` defines an item `bind`, perhaps you need to implement it
17 --> $DIR/issue-2149.rs:1:1
19 LL | trait VecMonad<A> {
22 error: aborting due to 2 previous errors
24 Some errors have detailed explanations: E0277, E0599.
25 For more information about an error, try `rustc --explain E0277`.