mirror of
https://github.com/rust-lang/rust.git
synced 2024-11-23 15:23:46 +00:00
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
|
6 | <i32 as Foo>::foo();
| ^^^ the trait `Bar` is not implemented for `i32`, which is required by `i32: Foo`
|
help: this trait has no implementations, consider adding one
--> f100.rs:2:1
|
2 | trait Bar {}
| ^^^^^^^^^
note: required for `i32` to implement `Foo`
--> f100.rs:3:14
|
3 | impl<T: Bar> Foo for T {}
| --- ^^^ ^
| |
| unsatisfied trait bound introduced here
```
Fix #40120.
37 lines
1.6 KiB
Plaintext
37 lines
1.6 KiB
Plaintext
error[E0277]: the type `&mut Context<'_>` may not be safely transferred across an unwind boundary
|
|
--> $DIR/async-is-unwindsafe.rs:12:5
|
|
|
|
|
LL | is_unwindsafe(async {
|
|
| _____^_____________-
|
|
| |_____|
|
|
| ||
|
|
LL | ||
|
|
LL | || use std::ptr::null;
|
|
LL | || use std::task::{Context, RawWaker, RawWakerVTable, Waker};
|
|
... ||
|
|
LL | || drop(cx_ref);
|
|
LL | || });
|
|
| ||_____-^ `&mut Context<'_>` may not be safely transferred across an unwind boundary
|
|
| |_____|
|
|
| within this `{async block@$DIR/async-is-unwindsafe.rs:12:19: 29:6}`
|
|
|
|
|
= help: within `{async block@$DIR/async-is-unwindsafe.rs:12:19: 29:6}`, the trait `UnwindSafe` is not implemented for `&mut Context<'_>`, which is required by `{async block@$DIR/async-is-unwindsafe.rs:12:19: 29:6}: UnwindSafe`
|
|
= note: `UnwindSafe` is implemented for `&Context<'_>`, but not for `&mut Context<'_>`
|
|
note: future does not implement `UnwindSafe` as this value is used across an await
|
|
--> $DIR/async-is-unwindsafe.rs:25:18
|
|
|
|
|
LL | let cx_ref = &mut cx;
|
|
| ------ has type `&mut Context<'_>` which does not implement `UnwindSafe`
|
|
LL |
|
|
LL | async {}.await; // this needs an inner await point
|
|
| ^^^^^ await occurs here, with `cx_ref` maybe used later
|
|
note: required by a bound in `is_unwindsafe`
|
|
--> $DIR/async-is-unwindsafe.rs:3:26
|
|
|
|
|
LL | fn is_unwindsafe(_: impl std::panic::UnwindSafe) {}
|
|
| ^^^^^^^^^^^^^^^^^^^^^^ required by this bound in `is_unwindsafe`
|
|
|
|
error: aborting due to 1 previous error
|
|
|
|
For more information about this error, try `rustc --explain E0277`.
|