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Rust 1.47.0 Release Notes

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

Rust 1.47.0 공식 release note를 기준으로, 섹션별 앞쪽 항목을 발췌해 변화 흐름을 빠르게 훑을 수 있게 정리했습니다.

범위​

  • 대상 릴리즈: Rust 1.47.0
  • 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 1.47.0 (2020-10-08)​

  • Language
    • Closures will now warn when not used.
  • Compiler
    • Stabilized the -C control-flow-guard codegen option, which enables Control Flow Guard for Windows platforms, and is ignored on other platforms.
    • Upgraded to LLVM 11.
    • Added tier 3* support for the thumbv4t-none-eabi target.
    • 그 외 2개 항목은 원문 참고
  • Libraries
    • CStr now implements Index<RangeFrom<usize>>.
    • Traits in std/core are now implemented for arrays of any length, not just those of length less than 33.
    • ops::RangeFull and ops::Range now implement Default.
    • 그 외 1개 항목은 원문 참고
  • Stabilized APIs
    • Ident::new_raw
    • Range::is_empty
    • RangeInclusive::is_empty
    • 그 외 10개 항목은 원문 참고
  • Cargo
    • build-dependencies are now built with opt-level 0 by default. You can override this by setting the following in your Cargo.toml. [profile.release.build-override] opt-level = 3
    • cargo-help will now display man pages for commands rather just the --help text.
    • cargo-metadata now emits a test field indicating if a target has tests enabled.
    • 그 외 2개 항목은 원문 참고
  • Compatibility Notes
    • Bumped the minimum supported Emscripten version to 1.39.20.
    • Fixed a regression parsing {} && false in tail expressions.
    • Added changes to how proc-macros are expanded in macro_rules! that should help to preserve more span information. These changes may cause compilation errors if your macro was unhygenic or didn't correctly handle Delimiter::None.
    • 그 외 3개 항목은 원문 참고

Sources​