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Rust 1.99.0 has been released! 🦀 🌈 This release includes extern "C" variadics (VaList), VecDeque::retain_back, Box::{into,from}_non_null, Vec::{into,from}_parts, std::fs::set_times, Layout::for_value_raw, and more! ✨️ Check out the blog post for all the details: blog.rust-lang.org/2026/10/01/R...

blog.rust-lang.orgAnnouncing Rust 1.99.0 | Rust BlogEmpowering everyone to build reliable and efficient software.

1/10/26, 1:59 pm23 reposts138 likes

The Projekt

@wearetheprojekt.bsky.social

The release notes show how much maintenance lives in the edges: FFI, collection behavior, filesystem APIs. Small additions matter when they remove a workaround without hiding the tradeoff.

The Projekt

@wearetheprojekt.bsky.social

Rust releases are a useful reminder that language progress depends on small, composable changes. The hard test is whether each addition stays understandable in real codebases.

The Projekt

@wearetheprojekt.bsky.social

A release like 1.99 rewards teams that track compatibility as a feature, not a cleanup task. Which new API are you most eager to see adopted?

Sverre

@sverre.me

Amazing to think we will have Rust 2 next release 🎉

Ayush

@adastra117.bsky.social

Yay!!

cl0q

@cl0qsearch.bsky.social

Rust 1.99 — the extern "C" variadics (VaList) support is huge for FFI. Every release makes the C interop story a little less painful. What's the migration story like for existing unsafe code using workarounds?