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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.
115 lines
5.3 KiB
Plaintext
115 lines
5.3 KiB
Plaintext
error[E0277]: `a::Inner<T>` doesn't implement `Debug`
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--> $DIR/derive-macro-missing-bounds.rs:12:21
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LL | #[derive(Debug)]
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| ----- in this derive macro expansion
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LL | struct Outer<T>(Inner<T>);
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| ^^^^^^^^ `a::Inner<T>` cannot be formatted using `{:?}`
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= help: the trait `Debug` is not implemented for `a::Inner<T>`, which is required by `&a::Inner<T>: Debug`
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= note: add `#[derive(Debug)]` to `a::Inner<T>` or manually `impl Debug for a::Inner<T>`
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= note: this error originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
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help: consider annotating `a::Inner<T>` with `#[derive(Debug)]`
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LL + #[derive(Debug)]
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LL | struct Inner<T>(T);
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help: consider introducing a `where` clause, but there might be an alternative better way to express this requirement
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LL | struct Outer<T>(Inner<T>) where a::Inner<T>: Debug;
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| ++++++++++++++++++++++++
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error[E0277]: the trait bound `T: c::Trait` is not satisfied
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--> $DIR/derive-macro-missing-bounds.rs:41:21
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LL | #[derive(Debug)]
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| ----- in this derive macro expansion
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LL | struct Outer<T>(Inner<T>);
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| ^^^^^^^^ the trait `c::Trait` is not implemented for `T`, which is required by `&c::Inner<T>: Debug`
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note: required for `c::Inner<T>` to implement `Debug`
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--> $DIR/derive-macro-missing-bounds.rs:34:28
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LL | impl<T: Debug + Trait> Debug for Inner<T> {
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| ----- ^^^^^ ^^^^^^^^
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| |
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| unsatisfied trait bound introduced here
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= note: 1 redundant requirement hidden
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= note: required for `&c::Inner<T>` to implement `Debug`
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= note: required for the cast from `&&c::Inner<T>` to `&dyn Debug`
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= note: this error originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
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help: consider restricting type parameter `T`
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LL | struct Outer<T: c::Trait>(Inner<T>);
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| ++++++++++
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error[E0277]: the trait bound `T: d::Trait` is not satisfied
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--> $DIR/derive-macro-missing-bounds.rs:56:21
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LL | #[derive(Debug)]
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| ----- in this derive macro expansion
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LL | struct Outer<T>(Inner<T>);
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| ^^^^^^^^ the trait `d::Trait` is not implemented for `T`, which is required by `&d::Inner<T>: Debug`
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note: required for `d::Inner<T>` to implement `Debug`
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--> $DIR/derive-macro-missing-bounds.rs:49:13
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LL | impl<T> Debug for Inner<T> where T: Debug, T: Trait {
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| ^^^^^ ^^^^^^^^ ----- unsatisfied trait bound introduced here
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= note: 1 redundant requirement hidden
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= note: required for `&d::Inner<T>` to implement `Debug`
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= note: required for the cast from `&&d::Inner<T>` to `&dyn Debug`
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= note: this error originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
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help: consider restricting type parameter `T`
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LL | struct Outer<T: d::Trait>(Inner<T>);
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| ++++++++++
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error[E0277]: the trait bound `T: e::Trait` is not satisfied
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--> $DIR/derive-macro-missing-bounds.rs:71:21
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LL | #[derive(Debug)]
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| ----- in this derive macro expansion
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LL | struct Outer<T>(Inner<T>);
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| ^^^^^^^^ the trait `e::Trait` is not implemented for `T`, which is required by `&e::Inner<T>: Debug`
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note: required for `e::Inner<T>` to implement `Debug`
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--> $DIR/derive-macro-missing-bounds.rs:64:13
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LL | impl<T> Debug for Inner<T> where T: Debug + Trait {
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| ^^^^^ ^^^^^^^^ ----- unsatisfied trait bound introduced here
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= note: 1 redundant requirement hidden
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= note: required for `&e::Inner<T>` to implement `Debug`
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= note: required for the cast from `&&e::Inner<T>` to `&dyn Debug`
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= note: this error originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
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help: consider restricting type parameter `T`
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LL | struct Outer<T: e::Trait>(Inner<T>);
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| ++++++++++
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error[E0277]: the trait bound `T: f::Trait` is not satisfied
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--> $DIR/derive-macro-missing-bounds.rs:86:21
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LL | #[derive(Debug)]
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| ----- in this derive macro expansion
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LL | struct Outer<T>(Inner<T>);
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| ^^^^^^^^ the trait `f::Trait` is not implemented for `T`, which is required by `&f::Inner<T>: Debug`
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note: required for `f::Inner<T>` to implement `Debug`
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--> $DIR/derive-macro-missing-bounds.rs:79:20
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LL | impl<T: Debug> Debug for Inner<T> where T: Trait {
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| ^^^^^ ^^^^^^^^ ----- unsatisfied trait bound introduced here
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= note: 1 redundant requirement hidden
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= note: required for `&f::Inner<T>` to implement `Debug`
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= note: required for the cast from `&&f::Inner<T>` to `&dyn Debug`
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= note: this error originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
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help: consider restricting type parameter `T`
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LL | struct Outer<T: f::Trait>(Inner<T>);
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| ++++++++++
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error: aborting due to 5 previous errors
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For more information about this error, try `rustc --explain E0277`.
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