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Rust 1.51.0 Release Notes

// RUST-RELEASE-NOTES — official release note timeline

Rust 1.51.0 공식 release note를 기준으로, 섹션별 앞쪽 항목을 발췌해 변화 흐름을 빠르게 훑을 수 있게 정리했습니다.

범위​

  • 대상 릴리즈: Rust 1.51.0
  • 포함된 릴리즈 수: 1개
  • 생성 경로: scripts/bloggen.py rust-release-docs
  • 생성일: 2026-07-08
  • 원문: rust-lang/rust RELEASES.md

읽는 법​

  • 이 문서는 해당 Rust 릴리즈 하나만 다룹니다.
  • 섹션별 최대 3개 앞쪽 항목만 발췌했으므로, 세부 API 목록은 원문 링크를 확인하세요.
  • Compatibility Notes는 업그레이드 전 회귀 위험을 확인하는 체크리스트로 보면 됩니다.

타임라인​

Rust 1.51.0 (2021-03-25)​

  • Language
    • You can now parameterize items such as functions, traits, and structs by constant values in addition to by types and lifetimes. Also known as "const generics" E.g. you can now write the following. Note: Only values of primitive integers, bool, or char types are currently permitted. struct GenericArray<T, const LENGTH: usize> { inner: [T; L…
  • Compiler
    • Added the -Csplit-debuginfo codegen option for macOS platforms. This option controls whether debug information is split across multiple files or packed into a single file. Note This option is unstable on other platforms.
    • Added tier 3* support for aarch64_be-unknown-linux-gnu, aarch64-unknown-linux-gnu_ilp32, and aarch64_be-unknown-linux-gnu_ilp32 targets.
    • Added tier 3 support for i386-unknown-linux-gnu and i486-unknown-linux-gnu targets.
    • 그 외 1개 항목은 원문 참고
  • Libraries
    • Box::downcast is now also implemented for any dyn Any + Send + Sync object.
    • str now implements AsMut&lt;str&gt;.
    • u64 and u128 now implement From&lt;char&gt;.
    • 그 외 6개 항목은 원문 참고
  • Stabilized APIs
    • Arc::decrement_strong_count
    • Arc::increment_strong_count
    • Once::call_once_force
    • 그 외 17개 항목은 원문 참고
  • Cargo
    • Added the split-debuginfo profile option to control the -Csplit-debuginfo codegen option.
    • Added the resolver field to Cargo.toml to enable the new feature resolver and CLI option behavior. Version 2 of the feature resolver will try to avoid unifying features of dependencies where that unification could be unwanted. Such as using the same dependency with a std feature in a build scripts and proc-macros, while using the no-std feature in t…
  • Rustdoc
    • Rustdoc will now include documentation for methods available from nested Deref traits.
    • You can now provide a --default-theme flag which sets the default theme to use for documentation.
    • You can link to non-path primitives such as slice.
    • 그 외 2개 항목은 원문 참고

Sources​