rust/tests/ui/rfcs/rfc-2397-do-not-recommend/feature-gate-do_not_recommend.stderr
Esteban Küber 6efddac288 Provide more context on derived obligation error primary label
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.
2024-01-30 21:28:18 +00:00

26 lines
861 B
Plaintext

error[E0277]: the trait bound `u8: Foo` is not satisfied
--> $DIR/feature-gate-do_not_recommend.rs:19:11
|
LL | stuff(1u8);
| ----- ^^^ the trait `Foo` is not implemented for `u8`, which is required by `u8: Bar`
| |
| required by a bound introduced by this call
|
= help: the trait `Foo` is implemented for `i32`
note: required for `u8` to implement `Bar`
--> $DIR/feature-gate-do_not_recommend.rs:13:14
|
LL | impl<T: Foo> Bar for T {
| --- ^^^ ^
| |
| unsatisfied trait bound introduced here
note: required by a bound in `stuff`
--> $DIR/feature-gate-do_not_recommend.rs:16:13
|
LL | fn stuff<T: Bar>(_: T) {}
| ^^^ required by this bound in `stuff`
error: aborting due to 1 previous error
For more information about this error, try `rustc --explain E0277`.