I believe the term "unsafe" in this sense predates Rust. Haskell's GHC has unsafePerformIO [1], which is very similar conceptually. Generally used to implemen

I believe the term "unsafe" in this sense predates Rust. Haskell's GHC has unsafePerformIO [1], which is very similar conceptually. Generally used to implement an algorithm in a way where it can be pure/safe in practice, but where this cannot be proved by the type system. [1] https://stackoverflow.com/questions/10529284/is-there-ever-a-good-reason-to-use-unsafeperformio https://stackoverflow.com/questions/10529284/is-there-ever-a...