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rust/tests/ui/async-await/async-is-unwindsafe.stderr
Esteban Küber 284437d434 Special case when a code line only has multiline span starts
```
3 |       X0 Y0 Z0
  |  _____^  -  -
  | | _______|  |
  | || _________|
4 | |||   X1 Y1 Z1
5 | |||   X2 Y2 Z2
  | |||____^__-__- `Z` label
  | ||_____|__|
  | |______|  `Y` is a good letter too
  |        `X` is a good letter
```
2024-06-23 22:00:52 +00:00

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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`.