Rust 1.99.1
Previous discussion on the miscompilation that was fixed: https://www.reddit.com/r/rust/comments/1wzn34d/1990_miscompilation_with_ffi_bool_return_type_on/
Previous discussion on the miscompilation that was fixed: https://www.reddit.com/r/rust/comments/1wzn34d/1990_miscompilation_with_ffi_bool_return_type_on/