Formally Verifying Popular Rust OSS With Lean 4 Uncovers More Bugs Than Expected
syumei · hn · 2026-10-20
A Hacker News write-up: the author set out to formally verify popular Rust open-source projects with Lean 4, expecting the main payoff to be correctness proofs — but found far more real bugs than anticipated. Even memory-safe Rust code harbors plenty of logical defects. The post documents the verification methodology, per-project process, and the concrete bugs uncovered, making a practical case for formal methods as a complement to testing.
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