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Note user-facing types of coercion failure #111451

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merged 1 commit into from
May 13, 2023

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When coercing, for example, Box<A> into Box<dyn B>, make sure that any failure notes mention those specific types, rather than mentioning inner types, like "the cast from A to dyn B".

I expect end-users are often confused when we skip layers of types and only mention the "innermost" part of a coercion, especially when other notes point at HIR, e.g. #111406.

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rustbot commented May 11, 2023

r? @b-naber

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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 May 11, 2023
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b-naber commented May 11, 2023

@bors r+ rollup

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bors commented May 11, 2023

📌 Commit ccd8ad7 has been approved by b-naber

It is now in the queue for this repository.

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bors commented May 11, 2023

🌲 The tree is currently closed for pull requests below priority 100. This pull request will be tested once the tree is reopened.

@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 May 11, 2023
matthiaskrgr added a commit to matthiaskrgr/rust that referenced this pull request May 11, 2023
…r=b-naber

Note user-facing types of coercion failure

When coercing, for example, `Box<A>` into `Box<dyn B>`, make sure that any failure notes mention *those* specific types, rather than mentioning inner types, like "the cast from `A` to `dyn B`".

I expect end-users are often confused when we skip layers of types and only mention the "innermost" part of a coercion, especially when other notes point at HIR, e.g. rust-lang#111406.
matthiaskrgr added a commit to matthiaskrgr/rust that referenced this pull request May 11, 2023
…r=b-naber

Note user-facing types of coercion failure

When coercing, for example, `Box<A>` into `Box<dyn B>`, make sure that any failure notes mention *those* specific types, rather than mentioning inner types, like "the cast from `A` to `dyn B`".

I expect end-users are often confused when we skip layers of types and only mention the "innermost" part of a coercion, especially when other notes point at HIR, e.g. rust-lang#111406.
matthiaskrgr added a commit to matthiaskrgr/rust that referenced this pull request May 11, 2023
…r=b-naber

Note user-facing types of coercion failure

When coercing, for example, `Box<A>` into `Box<dyn B>`, make sure that any failure notes mention *those* specific types, rather than mentioning inner types, like "the cast from `A` to `dyn B`".

I expect end-users are often confused when we skip layers of types and only mention the "innermost" part of a coercion, especially when other notes point at HIR, e.g. rust-lang#111406.
matthiaskrgr added a commit to matthiaskrgr/rust that referenced this pull request May 11, 2023
…r=b-naber

Note user-facing types of coercion failure

When coercing, for example, `Box<A>` into `Box<dyn B>`, make sure that any failure notes mention *those* specific types, rather than mentioning inner types, like "the cast from `A` to `dyn B`".

I expect end-users are often confused when we skip layers of types and only mention the "innermost" part of a coercion, especially when other notes point at HIR, e.g. rust-lang#111406.
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@bors r-

@bors bors added S-waiting-on-author Status: This is awaiting some action (such as code changes or more information) from the author. and removed S-waiting-on-bors Status: Waiting on bors to run and complete tests. Bors will change the label on completion. labels May 12, 2023
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@bors r=b-naber

rebased and blessed that windows test

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bors commented May 12, 2023

📌 Commit 14bf909 has been approved by b-naber

It is now in the queue for this repository.

@bors bors removed the S-waiting-on-author Status: This is awaiting some action (such as code changes or more information) from the author. label May 12, 2023
@bors bors added the S-waiting-on-bors Status: Waiting on bors to run and complete tests. Bors will change the label on completion. label May 12, 2023
bors added a commit to rust-lang-ci/rust that referenced this pull request May 13, 2023
Rollup of 6 pull requests

Successful merges:

 - rust-lang#110454 (Require impl Trait in associated types to appear in method signatures)
 - rust-lang#111096 (Add support for `cfg(overflow_checks)`)
 - rust-lang#111451 (Note user-facing types of coercion failure)
 - rust-lang#111469 (Fix data race in llvm source code coverage)
 - rust-lang#111494 (Encode `VariantIdx` so we can decode ADT variants in the right order)
 - rust-lang#111499 (asm: loongarch64: Drop efiapi)

Failed merges:

r? `@ghost`
`@rustbot` modify labels: rollup
@bors bors merged commit 05ca3e3 into rust-lang:master May 13, 2023
@rustbot rustbot added this to the 1.71.0 milestone May 13, 2023
@compiler-errors compiler-errors deleted the note-cast-origin branch August 11, 2023 20:12
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4 participants