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