Rust Release Changelog - 1.99.0

Hi, hello. Welcome to another video in the Rust Release Changelog Series In this episode, we are Folkert de Vries (https://github.com/folkertdev) Cameron Dershem (https://bsky.app/profile/pinkhatbeard.com) Chris Biscardi (https://bsky.app/profile/chrisbiscardi.bsky.social) 00:00 Rust Conf videos are out 00:22 raw_borrows_via_references 00:57 unconditional_panic 04:25 overflowing_literals 06:39 invalid_runtime_symbol_definitions 07:10 new Box::leak round-trip recommendation 08:41 proc macro hygiene 10:50 128 bit integers via vector registers 12:46 riscv64-unknown-linux-musl to tier 2 with host tools 13:43 cargo build-dir layout v2 15:22 cargo debug profile 16:32 C Variadics with Folkert de Vries 18:42 Why is C variadics needed? 22:29 How was C Variadics support added? 26:59 Future C Variadics work? - Rust Blog Post: https://blog.rust-lang.org/2026/10/01/Rust-1.99.0/ - weird-exprs: https://github.com/rust-lang/rust/blob/cc9a14f721fac5226338c61dcec7d5ab785bde82/tests/ui/expr/weird-exprs.rs - build-dir-layout-v2: https://blog.rust-lang.org/2026/03/13/call-for-testing-build-dir-layout-v2/