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b166642c35
Tweak errors coming from `for`-loop, `?` and `.await` desugaring
* Suggest removal of `.await` on non-`Future` expression
* Keep track of obligations introduced by desugaring
* Remove span pointing at method for obligation errors coming from desugaring
* Point at called local sync `fn` and suggest making it `async`
```
error[E0277]: `()` is not a future
--> $DIR/unnecessary-await.rs:9:10
|
LL | boo().await;
| -----^^^^^^ `()` is not a future
| |
| this call returns `()`
|
= help: the trait `Future` is not implemented for `()`
help: do not `.await` the expression
|
LL - boo().await;
LL + boo();
|
help: alternatively, consider making `fn boo` asynchronous
|
LL | async fn boo () {}
| +++++
```
Fix #66731.
|
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| .. | ||
| cargo | ||
| ui | ||
| ui-cargo | ||
| ui-internal | ||
| ui-toml | ||
| ui_test | ||
| clippy.toml | ||
| compile-test.rs | ||
| dogfood.rs | ||
| fmt.rs | ||
| integration.rs | ||
| lint_message_convention.rs | ||
| missing-test-files.rs | ||
| versioncheck.rs | ||