FYI to non-Rust devs wondering what's going on with this code: Those two abstractions (FFISafe and WithOffset) are not standard Rust abstractions. They're somet

FYI to non-Rust devs wondering what's going on with this code: Those two abstractions (FFISafe and WithOffset) are not standard Rust abstractions. They're something the author is building within their own library: https://github.com/memorysafety/rav1d/blob/25e5574/src/ffi_safe.rs#L11 https://github.com/memorysafety/rav1d/blob/25e5574/src/ffi_s... So for all of the complaining about Rust abstractions and syntax in this thread, keep in mind that these particular abstractions that caused this problem are not standard. If you just want to call an extern "C" function you can do so directly in an unsafe block. The article should be read as the author debugging their Rust wrapper types, not as a generic article about calling C functions from Rust.