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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
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6 | <i32 as Foo>::foo();
| ^^^ the trait `Bar` is not implemented for `i32`, which is required by `i32: Foo`
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help: this trait has no implementations, consider adding one
--> f100.rs:2:1
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2 | trait Bar {}
| ^^^^^^^^^
note: required for `i32` to implement `Foo`
--> f100.rs:3:14
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3 | impl<T: Bar> Foo for T {}
| --- ^^^ ^
| |
| unsatisfied trait bound introduced here
```
Fix #40120.
36 lines
1.5 KiB
Plaintext
36 lines
1.5 KiB
Plaintext
error[E0277]: the trait bound `Bar: Copy` is not satisfied
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--> $DIR/migrate-fail.rs:11:38
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LL | let arr: [Option<Bar>; 2] = [x; 2];
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| ^ the trait `Copy` is not implemented for `Bar`, which is required by `Option<Bar>: Copy`
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= note: required for `Option<Bar>` to implement `Copy`
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= note: the `Copy` trait is required because this value will be copied for each element of the array
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= help: consider using `core::array::from_fn` to initialize the array
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= help: see https://doc.rust-lang.org/stable/std/array/fn.from_fn.html for more information
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help: consider annotating `Bar` with `#[derive(Copy)]`
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LL + #[derive(Copy)]
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LL | struct Bar;
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error[E0277]: the trait bound `Bar: Copy` is not satisfied
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--> $DIR/migrate-fail.rs:17:38
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LL | let arr: [Option<Bar>; 2] = [x; 2];
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| ^ the trait `Copy` is not implemented for `Bar`, which is required by `Option<Bar>: Copy`
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= note: required for `Option<Bar>` to implement `Copy`
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= note: the `Copy` trait is required because this value will be copied for each element of the array
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= help: consider using `core::array::from_fn` to initialize the array
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= help: see https://doc.rust-lang.org/stable/std/array/fn.from_fn.html for more information
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help: consider annotating `Bar` with `#[derive(Copy)]`
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LL + #[derive(Copy)]
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LL | struct Bar;
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error: aborting due to 2 previous errors
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For more information about this error, try `rustc --explain E0277`.
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