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6efddac288
Expand the primary span of E0277 when the immediate unmet bound is not what the user wrote:
```
error[E0277]: the trait bound `i32: Bar` is not satisfied
--> f100.rs:6:6
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6 | <i32 as Foo>::foo();
| ^^^ the trait `Bar` is not implemented for `i32`, which is required by `i32: Foo`
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help: this trait has no implementations, consider adding one
--> f100.rs:2:1
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2 | trait Bar {}
| ^^^^^^^^^
note: required for `i32` to implement `Foo`
--> f100.rs:3:14
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3 | impl<T: Bar> Foo for T {}
| --- ^^^ ^
| |
| unsatisfied trait bound introduced here
```
Fix #40120.
68 lines
2.2 KiB
Plaintext
68 lines
2.2 KiB
Plaintext
error[E0277]: `()` is not a future
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--> $DIR/unnecessary-await.rs:9:11
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LL | boo().await;
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| ----- ^^^^^ `()` is not a future
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| this call returns `()`
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= help: the trait `Future` is not implemented for `()`, which is required by `(): IntoFuture`
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= note: () must be a future or must implement `IntoFuture` to be awaited
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= note: required for `()` to implement `IntoFuture`
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help: remove the `.await`
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LL - boo().await;
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LL + boo();
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help: alternatively, consider making `fn boo` asynchronous
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LL | async fn boo() {}
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| +++++
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error[E0277]: `()` is not a future
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--> $DIR/unnecessary-await.rs:28:10
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LL | e!().await;
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| -^^^^^
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| |`()` is not a future
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| help: remove the `.await`
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= help: the trait `Future` is not implemented for `()`, which is required by `(): IntoFuture`
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= note: () must be a future or must implement `IntoFuture` to be awaited
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= note: required for `()` to implement `IntoFuture`
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error[E0277]: `()` is not a future
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--> $DIR/unnecessary-await.rs:22:15
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LL | $expr.await
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| ^^^^^
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| `()` is not a future
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| remove the `.await`
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...
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LL | f!(());
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| ------ in this macro invocation
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= help: the trait `Future` is not implemented for `()`, which is required by `(): IntoFuture`
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= note: () must be a future or must implement `IntoFuture` to be awaited
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= note: required for `()` to implement `IntoFuture`
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= note: this error originates in the macro `f` (in Nightly builds, run with -Z macro-backtrace for more info)
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error[E0277]: `()` is not a future
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--> $DIR/unnecessary-await.rs:36:20
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LL | for x in [] {}.await
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| -^^^^^
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| |`()` is not a future
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| help: remove the `.await`
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= help: the trait `Future` is not implemented for `()`, which is required by `(): IntoFuture`
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= note: () must be a future or must implement `IntoFuture` to be awaited
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= note: required for `()` to implement `IntoFuture`
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error: aborting due to 4 previous errors
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For more information about this error, try `rustc --explain E0277`.
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