What's New in Rust 1.81 through 1.84

Jon and Ben discuss the highlights of the 1.81 through 1.84 releases of Rust.

This episode was recorded as part of a YouTube live stream on 2025-10-26, which you can still watch.

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Timestamps & referenced resources

[@01:58] - Rust 1.81

• [@02:05] - core::error::Error
  • Tracking issue for generic member access
  • build-std Rust project goal
• [@08:27] - New sort implementations
  • PR implementing the change
  • Repo with the research
• [@10:49] - #[expect(lint)]
• [@14:37] - Lint reasons
• [@16:18] - Stabilized APIs
  • [@16:34] - Duration::abs_diff
  • [@17:25] - hint::assert_unchecked
  • [@22:36] - fs::exists
• [@25:37] - Compatibility notes
  • [@20:40] - Split panic hook and panic handler arguments
  • [@23:00] - Abort on uncaught panics in extern "C" functions
  • [@27:01] - WASI 0.1 target naming changed
  • [@30:10] - Fix for CVE-2024-43402
    • CVE announcement

[@33:39] - Rust 1.82

• [@33:39] - cargo info
• [@35:06] - Apple target promotions