Invert dependency between rustc_errors and rustc_abi.#154449
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rust-bors[bot] merged 2 commits intorust-lang:mainfrom Apr 10, 2026
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Invert dependency between rustc_errors and rustc_abi.#154449rust-bors[bot] merged 2 commits intorust-lang:mainfrom
rustc_errors and rustc_abi.#154449rust-bors[bot] merged 2 commits intorust-lang:mainfrom
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These commits modify compiler targets.
cc @TaKO8Ki These commits modify the If this was unintentional then you should revert the changes before this PR is merged. |
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Partial crate graph, before: And after: I doubt this has any effect on bootstrap times because the relevant crates are quite small. |
Currently, `rustc_errors` depends on `rustc_abi`, which depends on `rustc_error_messages`. This is a bit odd. `rustc_errors` depends on `rustc_abi` for a single reason: `rustc_abi` defines a type `TargetDataLayoutErrors` and `rustc_errors` impls `Diagnostic` for that type. We can get a more natural relationship by inverting the dependency, moving the `Diagnostic` trait upstream. Then `rustc_abi` defines `TargetDataLayoutErrors` and also impls `Diagnostic` for it. `rustc_errors` is already pretty far upstream in the crate graph, it doesn't hurt to push it a little further because errors are a very low-level concept.
Error enum names should not be plural. Even though there are multiple possible errors, each instance of an error enum describes a single error. There are dozens of singular error enum names, and only two plural error enum names. This commit makes them both singular.
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This PR was rebased onto a different main commit. Here's a range-diff highlighting what actually changed. Rebasing is a normal part of keeping PRs up to date, so no action is needed—this note is just to help reviewers. |
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@bors r+ rollup |
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…_abi, r=davidtwco Invert dependency between `rustc_errors` and `rustc_abi`. Currently, `rustc_errors` depends on `rustc_abi`, which depends on `rustc_error_messages`. This is a bit odd. `rustc_errors` depends on `rustc_abi` for a single reason: `rustc_abi` defines a type `TargetDataLayoutErrors` and `rustc_errors` impls `Diagnostic` for that type. We can get a more natural relationship by inverting the dependency, moving the `Diagnostic` trait upstream. Then `rustc_abi` defines `TargetDataLayoutErrors` and also impls `Diagnostic` for it. `rustc_errors` is already pretty far upstream in the crate graph, it doesn't hurt to push it a little further because errors are a very low-level concept. r? @davidtwco
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…uwer Rollup of 6 pull requests Successful merges: - #152901 (Introduce a `#[diagnostic::on_unknown]` attribute) - #155078 (Reject dangling attributes in where clauses) - #154449 (Invert dependency between `rustc_errors` and `rustc_abi`.) - #154646 (Add suggestion to `.to_owned()` used on `Cow` when borrowing) - #154993 (compiletest: pass -Zunstable-options for unpretty and no-codegen paths) - #155097 (Make `rustc_attr_parsing::SharedContext::emit_lint` take a `MultiSpan` instead of a `Span`)
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Rollup merge of #154449 - nnethercote:rustc_errors-dep-rustc_abi, r=davidtwco Invert dependency between `rustc_errors` and `rustc_abi`. Currently, `rustc_errors` depends on `rustc_abi`, which depends on `rustc_error_messages`. This is a bit odd. `rustc_errors` depends on `rustc_abi` for a single reason: `rustc_abi` defines a type `TargetDataLayoutErrors` and `rustc_errors` impls `Diagnostic` for that type. We can get a more natural relationship by inverting the dependency, moving the `Diagnostic` trait upstream. Then `rustc_abi` defines `TargetDataLayoutErrors` and also impls `Diagnostic` for it. `rustc_errors` is already pretty far upstream in the crate graph, it doesn't hurt to push it a little further because errors are a very low-level concept. r? @davidtwco
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…uwer Rollup of 6 pull requests Successful merges: - rust-lang/rust#152901 (Introduce a `#[diagnostic::on_unknown]` attribute) - rust-lang/rust#155078 (Reject dangling attributes in where clauses) - rust-lang/rust#154449 (Invert dependency between `rustc_errors` and `rustc_abi`.) - rust-lang/rust#154646 (Add suggestion to `.to_owned()` used on `Cow` when borrowing) - rust-lang/rust#154993 (compiletest: pass -Zunstable-options for unpretty and no-codegen paths) - rust-lang/rust#155097 (Make `rustc_attr_parsing::SharedContext::emit_lint` take a `MultiSpan` instead of a `Span`)
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Currently,
rustc_errorsdepends onrustc_abi, which depends onrustc_error_messages. This is a bit odd.rustc_errorsdepends onrustc_abifor a single reason:rustc_abidefines a typeTargetDataLayoutErrorsandrustc_errorsimplsDiagnosticfor that type.We can get a more natural relationship by inverting the dependency, moving the
Diagnostictrait upstream. Thenrustc_abidefinesTargetDataLayoutErrorsand also implsDiagnosticfor it.rustc_errorsis already pretty far upstream in the crate graph, it doesn't hurt to push it a little further because errors are a very low-level concept.r? @davidtwco