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error[E0277]: the trait bound `B: Bar` is not satisfied
--> $DIR/future.rs:15:5
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LL | async move { bar.bar() }
| ^^^^^^^^^^^^^^^^^^^^^^^^ the trait `Bar` is not implemented for `B`
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note: required by a bound in `foo`
--> $DIR/future.rs:14:11
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LL | fn foo<B: Bar>(bar: B) -> FooFuture<B> {
| ^^^ required by this bound in `foo`
help: consider restricting type parameter `B` with trait `Bar`
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LL | type FooFuture<B: Bar> = impl Future<Output = ()>;
| +++++
error: aborting due to 1 previous error
For more information about this error, try `rustc --explain E0277`.
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