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Provide more context on derived obligation error primary label #120469

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merged 1 commit into from
Jan 31, 2024

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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.

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rustbot commented Jan 29, 2024

r? @TaKO8Ki

(rustbot has picked a reviewer for you, use r? to override)

@rustbot rustbot added S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue. labels Jan 29, 2024
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bors commented Jan 30, 2024

☔ The latest upstream changes (presumably #120496) made this pull request unmergeable. Please resolve the merge conflicts.

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 rust-lang#40120.
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TaKO8Ki commented Jan 31, 2024

@bors r+ rollup

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bors commented Jan 31, 2024

📌 Commit 6efddac has been approved by TaKO8Ki

It is now in the queue for this repository.

@bors bors added S-waiting-on-bors Status: Waiting on bors to run and complete tests. Bors will change the label on completion. and removed S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. labels Jan 31, 2024
Nadrieril added a commit to Nadrieril/rust that referenced this pull request Jan 31, 2024
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 rust-lang#40120.
bors added a commit to rust-lang-ci/rust that referenced this pull request Jan 31, 2024
Rollup of 9 pull requests

Successful merges:

 - rust-lang#120207 (check `RUST_BOOTSTRAP_CONFIG` in `profile_user_dist` test)
 - rust-lang#120321 (pattern_analysis: cleanup the contexts)
 - rust-lang#120355 (document `FromIterator for Vec` allocation behaviors)
 - rust-lang#120430 (std: thread_local::register_dtor fix proposal for FreeBSD.)
 - rust-lang#120469 (Provide more context on derived obligation error primary label)
 - rust-lang#120470 (Mark "unused binding" suggestion as maybe incorrect)
 - rust-lang#120472 (Make duplicate lang items fatal)
 - rust-lang#120495 (Remove the `abi_amdgpu_kernel` feature)
 - rust-lang#120501 (rustdoc: Correctly handle attribute merge if this is a glob reexport)

r? `@ghost`
`@rustbot` modify labels: rollup
bors added a commit to rust-lang-ci/rust that referenced this pull request Jan 31, 2024
Rollup of 9 pull requests

Successful merges:

 - rust-lang#120207 (check `RUST_BOOTSTRAP_CONFIG` in `profile_user_dist` test)
 - rust-lang#120321 (pattern_analysis: cleanup the contexts)
 - rust-lang#120355 (document `FromIterator for Vec` allocation behaviors)
 - rust-lang#120430 (std: thread_local::register_dtor fix proposal for FreeBSD.)
 - rust-lang#120469 (Provide more context on derived obligation error primary label)
 - rust-lang#120472 (Make duplicate lang items fatal)
 - rust-lang#120490 (Don't hash lints differently to non-lints.)
 - rust-lang#120495 (Remove the `abi_amdgpu_kernel` feature)
 - rust-lang#120501 (rustdoc: Correctly handle attribute merge if this is a glob reexport)

r? `@ghost`
`@rustbot` modify labels: rollup
@bors bors merged commit 0313eb2 into rust-lang:master Jan 31, 2024
11 checks passed
@rustbot rustbot added this to the 1.77.0 milestone Jan 31, 2024
rust-timer added a commit to rust-lang-ci/rust that referenced this pull request Jan 31, 2024
Rollup merge of rust-lang#120469 - estebank:issue-40120, r=TaKO8Ki

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 rust-lang#40120.
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E0277 message is misleading when there's a blanket impl
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