rust/tests/ui/derives/derives-span-Debug-tuple-struct.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

22 lines
793 B
Plaintext

error[E0277]: `Error` doesn't implement `Debug`
--> $DIR/derives-span-Debug-tuple-struct.rs:8:5
|
LL | #[derive(Debug)]
| ----- in this derive macro expansion
LL | struct Struct(
LL | Error
| ^^^^^ `Error` cannot be formatted using `{:?}`
|
= help: the trait `Debug` is not implemented for `Error`, which is required by `&Error: Debug`
= note: add `#[derive(Debug)]` to `Error` or manually `impl Debug for Error`
= note: this error originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
help: consider annotating `Error` with `#[derive(Debug)]`
|
LL + #[derive(Debug)]
LL | struct Error;
|
error: aborting due to 1 previous error
For more information about this error, try `rustc --explain E0277`.