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Fix mixed use of "a" / "an" article in E0277#158518

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rust-lang:mainfrom
ElectrifyPro:20777-thing
Jun 28, 2026
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Fix mixed use of "a" / "an" article in E0277#158518
rust-bors[bot] merged 3 commits into
rust-lang:mainfrom
ElectrifyPro:20777-thing

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@ElectrifyPro ElectrifyPro commented Jun 28, 2026

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This PR fixes a tiny little annoyance typo in error E0277. Currently, this code fails to compile (correctly) with the following error:

struct A<F: Fn()>(F);

impl<F> A<F> {}

fn main() {}
error[E0277]: expected a `Fn()` closure, found `F`
 --> src/main.rs:3:9
  |
3 | impl<F> A<F> {}
  |         ^^^^ expected an `Fn()` closure, found `F`
  |
  = note: wrap the `F` in a closure with no arguments: `|| { /* code */ }`
... truncated

Unfortunately, the first line of the error message uses the article "a", when it should be "an" for the Fn trait and friends. The help label does use the correct article, "an".

Unless if I have been pronouncing Fn incorrectly...

@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. T-libs Relevant to the library team, which will review and decide on the PR/issue. labels Jun 28, 2026
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r? @petrochenkov

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@rustbot rustbot added the WG-trait-system-refactor The Rustc Trait System Refactor Initiative (-Znext-solver) label Jun 28, 2026
JonathanBrouwer
JonathanBrouwer approved these changes Jun 28, 2026
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Agreed, I've always pronounced this Ef En closure, so the an article makes sense

@bors r+ rollup

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📌 Commit fd67621 has been approved by JonathanBrouwer

It is now in the queue for this repository.

@rust-bors rust-bors Bot 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 Jun 28, 2026
@JonathanBrouwer JonathanBrouwer mentioned this pull request Jun 28, 2026
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rust-bors Bot pushed a commit that referenced this pull request Jun 28, 2026
@bors
Auto merge of #158524 - JonathanBrouwer:rollup-75ZlceV, r=JonathanBro…
7b53105 
…uwer

Rollup of 4 pull requests

Successful merges:

 - #158486 (std: treat ENFILE as transient in the pidfd support probe)
 - #158454 (regression test for `Trait<A><B>` in "consider further restricting this bound" suggestion)
 - #158518 (Fix mixed use of "a" / "an" article in E0277)
 - #158519 (add crashtests [2/N])
rust-bors Bot pushed a commit that referenced this pull request Jun 28, 2026
@bors
Auto merge of #158524 - JonathanBrouwer:rollup-75ZlceV, r=JonathanBro…
2574810 
…uwer

Rollup of 4 pull requests

Successful merges:

 - #158486 (std: treat ENFILE as transient in the pidfd support probe)
 - #158454 (regression test for `Trait<A><B>` in "consider further restricting this bound" suggestion)
 - #158518 (Fix mixed use of "a" / "an" article in E0277)
 - #158519 (add crashtests [2/N])
@rust-bors rust-bors Bot merged commit 5a890e9 into rust-lang:main Jun 28, 2026
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@rustbot rustbot added this to the 1.98.0 milestone Jun 28, 2026
@ElectrifyPro ElectrifyPro deleted the 20777-thing branch June 28, 2026 22:29
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@JonathanBrouwer JonathanBrouwer JonathanBrouwer approved these changes

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