Bun rewrites from Zig to Rust to fix memory safety bugs

Bun 被 Anthropic 收购后用 Rust 重写，月下载超 2200 万

Jarred Sumner announced Bun is being rewritten from Zig to Rust. The trigger was a long list of use-after-free, double-free, and memory leak fixes in v1.3.14—mixing GC with manual memory management proved too error-prone. With 22M+ monthly downloads and adoption by tools like Claude Code, the team decided one-off bug fixes aren't sustainable. A pre-release Claude Fable 5 assisted the rewrite. The post does not disclose a migration timeline.

Why it matters: Post-acquisition, Bun announces a Zig-to-Rust rewrite driven by concrete memory bugs from mixing manual management with GC. 22M monthly downloads and Claude Code usage give it weight. Capped at 78 rather than 85 because this is a tech-stack migration announcement, not a new pr...