compilers

Rust 1.100.0, announced November 12, 2026, stabilizes the never type and core parts of the Allocator API, and switches pre-2024 never type fallback from () to !.

Reporting on Bun, Copilot's runtime, OpenAI's Habitat, TypeScript ports and a Rails benchmark finds large claimed speedups, mostly self-reported, with disputed baselines and verification limits.

Kotlin 2.5.0-Beta2, a pre-release published October 21, introduces experimental companion blocks and full value classes, a .kar publication format for multiplatform libraries, and an error on compiler runs below JDK 17.

The Scala project announced 3.10.0 on 12 October 2026, removing legacy syntax, stabilizing SIP-67 and previewing three SIPs; its blog and GitHub notes differ on the strict-equality SIP.

Zig 0.17 separates the build maker and configurer processes, adds a Build Server Protocol and enables incremental compilation on x86_64-linux, while removing several language features.

Vercel Labs' experimental scriptc compiler turns ordinary TypeScript into small native binaries with no embedded Node or JavaScript engine, now at version 0.1.4 with more than 5,000 GitHub stars.

Microsoft has elevated Rust to Tier-1 status alongside C++, C#, and TypeScript, and detailed a new compiler backend linking Rust to MSVC.

Swift 6.4 is generally available, switching Swift Package Manager to the Swift Build backend by default and adding Subprocess 1.0, C++20 std::span interop, and faster WebAssembly bridging.

Rust's compiler team merged the long-pending stabilization of the never type (!), letting developers name it directly and aliasing Infallible to it.

A new paper on the mold linker reports it is 2.4-16.1x faster than lld and up to 112x faster than GNU ld, and has been accepted to ASPLOS 2027.

Doug Gregor detailed Embedded Swift additions landing ahead of Swift 6.4: broader `any` type support, untyped throws, and full metatype support.

The Rust project switched nightly builds to a rewritten trait solver by default, calling it the largest single compiler change since Rust's initial release.