rust/compiler/rustc_middle/src/ty/diagnostics.rs, branch try-perf

Move `IntoDiagArg` earlier in the dependency chains

2025-08-20T22:01:13+00:00

`rustc_errors` depends on numerous crates, solely to implement its `IntoDiagArg` trait on types from those crates. Many crates depend on `rustc_errors`, and it's on the critical path. We can't swap things around to make all of those crates depend on `rustc_errors` instead, because `rustc_errors` would end up in dependency cycles. Instead, move `IntoDiagArg` into `rustc_error_messages`, which has far fewer dependencies, and then have most of these crates depend on `rustc_error_messages`. This allows `rustc_errors` to drop dependencies on several crates, including the large `rustc_target`. (This doesn't fully reduce dependency chains yet, as `rustc_errors` still depends on `rustc_hir` which depends on `rustc_target`. That will get fixed in a subsequent commit.)

Add support for shortening `Instance` and use it

2025-08-06T22:21:49+00:00

Replace ad-hoc type path shortening logic for recursive mono instantiation errors to use `tcx.short_string()` instead.

Auto merge of #131160 - ismailarilik:handle-potential-query-instability-lint-for-rustc-middle, r=oli-obk

2025-05-06T01:36:23+00:00

Handle `rustc_middle` cases of `rustc::potential_query_instability` lint This PR removes `#![allow(rustc::potential_query_instability)]` line from [`compiler/rustc_middle/src/lib.rs`](https://github.com/rust-lang/rust/blob/master/compiler/rustc_middle/src/lib.rs#L29) and converts `FxHash{Map,Set}` types into `FxIndex{Map,Set}` to suppress lint errors. A somewhat tracking issue: https://github.com/rust-lang/rust/issues/84447 r? `@compiler-errors`

Handle rustc_middle cases of rustc::potential_query_instability lint

2025-05-05T13:36:04+00:00

Rename `LifetimeName` as `LifetimeKind`.

2025-04-15T21:16:40+00:00

It's a much better name, more consistent with how we name such things. Also rename `Lifetime::res` as `Lifetime::kind` to match. I suspect this field used to have the type `LifetimeRes` and then the type was changed but the field name remained the same.

Remove unused `Map` field from `TraitObjectVisitor`.

2025-04-13T23:16:32+00:00

Also reduce visibility.

Remove unused `StaticLifetimeVisitor`.

2025-04-13T23:16:32+00:00

Auto merge of #138595 - jhpratt:rollup-09pvfzu, r=jhpratt

2025-03-17T10:43:38+00:00

Rollup of 9 pull requests Successful merges: - #136355 (Add `*_value` methods to proc_macro lib) - #137621 (Add std support to cygwin target) - #137793 (Stablize anonymous pipe) - #138341 (std: Mention clone-on-write mutation in Arc) - #138517 (Improve upvar analysis for deref of child capture) - #138584 (Update Rust Foundation links in Readme) - #138586 (Document `#![register_tool]`) - #138590 (Flatten and simplify some control flow 🫓) - #138592 (update change entry for #137147) r? `@ghost` `@rustbot` modify labels: rollup

Flatten and simplify some control flow

2025-03-17T09:15:49+00:00

Use `strip_{prefix|suffix}` instead of `{starts|ends}_with`+indexing

2025-03-17T07:06:10+00:00