What's New in Rust 1.79 and 1.80

Jon and Ben discuss the highlights of the 1.79 and 1.80 releases of Rust. Contributing to Rustacean Station Rustacean Station is a community project; get in touch with us if you’d like to suggest an idea for an episode or offer your services as a host or audio editor! Twitter: @rustaceanfm Discord: Rustacean Station Github: @rustacean-station Email: hello@rustacean-station.org Timestamps & referenced resources [@01:02] - Rust 1.79 [@01:02] - Inline const expressions [@08:33] - Bounds in associated type position [@14:11] - Extending automatic temporary lifetime extension Mara’s blog post on temporary lifetimes [@21:55] - Frame pointers enabled in standard library builds Does omitting the frame pointer really affect performance? [@25:37] - Stabilized APIs [@25:37] - {integer}::unchecked_add [@27:39] - <*const [T]>::len [@29:21] - <[u8]>::utf8_chunks [@31:21] - CStr::count_bytes [@32:41] - num::NonZero<T> [@36:30] - io::Error::downcast [@36:50] - path::absolute [@38:18] - Changelog deep-dive [@38:31] - Stabilize WASM target features that are in phase 4 and 5 [@39:15] - Document overrides of clone_from() in core/std [@41:46] - Switch to using gitoxide by default for listing files in cargo [@43:03] - Stabilize lint unnameable_types [@44:46] - manual_clamp lint [@45:46] - Rust 1.80 [@46:09] - LazyCell and LazyLock [@53:42] - Checked cfg names and values Detailed blog post on checked cfg [@56:41] - Exclusive ranges in patterns [@58:52] - Stabilized APIs [@59:05] - Vec::<[T; N]>::into_flattened <[[T; N]]>::as_flattened [@1:00:31] - <[u8]>::trim_ascii [@1:02:06] - NonNull::add and other ptr-like methods [@1:03:41] - impl IntoIterator for Box<[T]> [@1:05:46] - Option::take_if [@1:07:30] - Ipv4Addr::to_bits [@1:09:10] - Changelog deep-dive [@1:09:25] - x86_64-unknown-linux-none [@1:11:07] - Add size_of and align_of to the prelude [@1:12:34] - Never type fallback flowing into unsafe [@1:17:29] - New panics and aborts in the standard library Abort when OwnedFd is violated Panic if set_extension adds / [@1:20:28] - Restore enum variants in rustdoc for type aliases [@1:21:12] - Change assigning_clones lint to pedantic [@1:22:15] - Turn lints into hard errors [@1:22:49] - env::set_var regression [@1:24:34] - StdoutLock regression [@1:26:00] - Rust 1.80.1 Fixes miscompilation when comparing floats and false positives in the dead_code lint. Credits Intro Theme: Aerocity Audio Editing: Jon Gjengset Hosting Infrastructure: Jon Gjengset Show Notes: Jon Gjengset Hosts: Jon Gjengset and Ben Striegel

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What's New in Rust 1.79 and 1.80 is an episode from Rustacean Station by Jon Gjengset.

This episode is 01:27:46 long.

This episode was published on May 10, 2025.

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