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Add a note for ? on a impl Future<Output = Result<..>> in sync function #131549

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merged 2 commits into from
Oct 22, 2024

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It's confusing to ? a future of a result in a sync function. We have a suggestion to .await it if we're in an async function, but not a sync function. Note that this is the case for sync functions, at least.

Let's be a bit more vague about a fix, since it's somewhat context dependent. For example, you could block on it, or you could make your function asynchronous. 🤷

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rustbot commented Oct 11, 2024

r? @spastorino

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@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 Oct 11, 2024
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@bors r+ rollup

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bors commented Oct 22, 2024

📌 Commit c8b71ef has been approved by spastorino

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 Oct 22, 2024
bors added a commit to rust-lang-ci/rust that referenced this pull request Oct 22, 2024
…iaskrgr

Rollup of 8 pull requests

Successful merges:

 - rust-lang#125205 (Fixup Windows verbatim paths when used with the `include!` macro)
 - rust-lang#131049 (Validate args are correct for `UnevaluatedConst`, `ExistentialTraitRef`/`ExistentialProjection`)
 - rust-lang#131549 (Add a note for `?` on a `impl Future<Output = Result<..>>` in sync function)
 - rust-lang#131731 (add `TestFloatParse` to `tools.rs` for bootstrap)
 - rust-lang#131732 (Add doc(plugins), doc(passes), etc. to INVALID_DOC_ATTRIBUTES)
 - rust-lang#132006 (don't stage-off to previous compiler when CI rustc is available)
 - rust-lang#132022 (Move `cmp_in_dominator_order` out of graph dominator computation)
 - rust-lang#132033 (compiletest: Make `line_directive` return a `DirectiveLine`)

r? `@ghost`
`@rustbot` modify labels: rollup
@bors bors merged commit 457087e into rust-lang:master Oct 22, 2024
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@rustbot rustbot added this to the 1.84.0 milestone Oct 22, 2024
rust-timer added a commit to rust-lang-ci/rust that referenced this pull request Oct 22, 2024
Rollup merge of rust-lang#131549 - compiler-errors:try-in-sync, r=spastorino

Add a note for `?` on a `impl Future<Output = Result<..>>` in sync function

It's confusing to `?` a future of a result in a sync function. We have a suggestion to `.await` it if we're in an async function, but not a sync function. Note that this is the case for sync functions, at least.

Let's be a bit more vague about a fix, since it's somewhat context dependent. For example, you could block on it, or you could make your function asynchronous. 🤷
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