Rust 1.100.0 marks the language's first three-digit stable release, featuring the long-awaited stabilization of the never type (!), which took a decade to finalize. This release also introduces core custom allocators, a new DropGuard helper, and improvements to Cargo's dependency management. While the never type brings significant benefits for code control flow, it may create compatibility issues for pre-2024 edition code, necessitating thorough testing before deployment. In addition to these major updates, Rust 1.100.0 also enhances safety and usability features across the platform, reaffirming the language's commitment to backward compatibility and gradual evolution rather than a complete overhaul

Rust 1.100.0 Release: Never Type Stabilizes After a Decade

Rust 1.100.0 becoming the language's first three-digit stable release. Its headline feature is the never type (!), which stabilized after ten years, five failed attempts, and over two years of work by contributor waffle. The release also brings core custom allocators, a DropGuard helper, a conjure_zst constructor, and Cargo's supply-chain dependency cooldowns. However, a narrow never-type fallback change can break pre-2024 edition code, so testing against beta first is advised.

Rust 1.100.0 Release: Never Type Stabilizes After a Decade @ Linux Compatible