5b54286640
Remove the "which is required by `{root_obligation}`" post-script in
"the trait `X` is not implemented for `Y`" explanation in E0277. This
information is already conveyed in the notes explaining requirements,
making it redundant while making the text (particularly in labels)
harder to read.
```
error[E0277]: the trait bound `NotCopy: Copy` is not satisfied
--> $DIR/wf-static-type.rs:10:13
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LL | static FOO: IsCopy<Option<NotCopy>> = IsCopy { t: None };
| ^^^^^^^^^^^^^^^^^^^^^^^ the trait `Copy` is not implemented for `NotCopy`
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= note: required for `Option<NotCopy>` to implement `Copy`
note: required by a bound in `IsCopy`
--> $DIR/wf-static-type.rs:7:17
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LL | struct IsCopy<T:Copy> { t: T }
| ^^^^ required by this bound in `IsCopy`
```
vs the prior
```
error[E0277]: the trait bound `NotCopy: Copy` is not satisfied
--> $DIR/wf-static-type.rs:10:13
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LL | static FOO: IsCopy<Option<NotCopy>> = IsCopy { t: None };
| ^^^^^^^^^^^^^^^^^^^^^^^ the trait `Copy` is not implemented for `NotCopy`, which is required by `Option<NotCopy>: Copy`
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= note: required for `Option<NotCopy>` to implement `Copy`
note: required by a bound in `IsCopy`
--> $DIR/wf-static-type.rs:7:17
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LL | struct IsCopy<T:Copy> { t: T }
| ^^^^ required by this bound in `IsCopy`
```
100 lines
3.6 KiB
Plaintext
100 lines
3.6 KiB
Plaintext
error: future cannot be sent between threads safely
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--> $DIR/async-await-let-else.rs:45:13
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LL | is_send(foo(Some(true)));
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| ^^^^^^^^^^^^^^^ future returned by `foo` is not `Send`
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= help: within `impl Future<Output = ()>`, the trait `Send` is not implemented for `Rc<()>`
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note: future is not `Send` as this value is used across an await
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--> $DIR/async-await-let-else.rs:8:15
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LL | let r = Rc::new(());
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| - has type `Rc<()>` which is not `Send`
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LL | bar().await
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| ^^^^^ await occurs here, with `r` maybe used later
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note: required by a bound in `is_send`
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--> $DIR/async-await-let-else.rs:16:15
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LL | fn is_send<T: Send>(_: T) {}
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| ^^^^ required by this bound in `is_send`
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error[E0277]: `Rc<()>` cannot be sent between threads safely
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--> $DIR/async-await-let-else.rs:47:13
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LL | async fn foo2(x: Option<bool>) {
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| ------------------------------ within this `impl Future<Output = ()>`
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...
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LL | is_send(foo2(Some(true)));
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| ------- ^^^^^^^^^^^^^^^^ `Rc<()>` cannot be sent between threads safely
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| |
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| required by a bound introduced by this call
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= help: within `impl Future<Output = ()>`, the trait `Send` is not implemented for `Rc<()>`
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note: required because it's used within this `async` fn body
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--> $DIR/async-await-let-else.rs:24:29
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LL | async fn bar2<T>(_: T) -> ! {
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| _____________________________^
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LL | | panic!()
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LL | | }
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| |_^
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note: required because it's used within this `async` fn body
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--> $DIR/async-await-let-else.rs:18:32
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LL | async fn foo2(x: Option<bool>) {
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| ________________________________^
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LL | | let Some(_) = x else {
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LL | | bar2(Rc::new(())).await
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LL | | };
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LL | | }
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| |_^
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note: required by a bound in `is_send`
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--> $DIR/async-await-let-else.rs:16:15
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LL | fn is_send<T: Send>(_: T) {}
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| ^^^^ required by this bound in `is_send`
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error: future cannot be sent between threads safely
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--> $DIR/async-await-let-else.rs:49:13
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LL | is_send(foo3(Some(true)));
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| ^^^^^^^^^^^^^^^^ future returned by `foo3` is not `Send`
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= help: within `impl Future<Output = ()>`, the trait `Send` is not implemented for `Rc<()>`
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note: future is not `Send` as this value is used across an await
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--> $DIR/async-await-let-else.rs:30:29
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LL | (Rc::new(()), bar().await);
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| ----------- ^^^^^ await occurs here, with `Rc::new(())` maybe used later
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| |
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| has type `Rc<()>` which is not `Send`
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note: required by a bound in `is_send`
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--> $DIR/async-await-let-else.rs:16:15
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LL | fn is_send<T: Send>(_: T) {}
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| ^^^^ required by this bound in `is_send`
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error: future cannot be sent between threads safely
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--> $DIR/async-await-let-else.rs:51:13
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LL | is_send(foo4(Some(true)));
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| ^^^^^^^^^^^^^^^^ future returned by `foo4` is not `Send`
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= help: within `impl Future<Output = ()>`, the trait `Send` is not implemented for `Rc<()>`
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note: future is not `Send` as this value is used across an await
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--> $DIR/async-await-let-else.rs:38:15
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LL | let r = Rc::new(());
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| - has type `Rc<()>` which is not `Send`
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LL | bar().await;
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| ^^^^^ await occurs here, with `r` maybe used later
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note: required by a bound in `is_send`
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--> $DIR/async-await-let-else.rs:16:15
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LL | fn is_send<T: Send>(_: T) {}
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| ^^^^ required by this bound in `is_send`
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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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