Worked on enhancing error handling and documentation for the into_array method across the ferrocene/ferrocene and rust-lang/rust repositories. Focused on improving API clarity by refactoring into_array for Arc, Rc, and Box to return a Result instead of an Option, allowing the original object to be returned on failure and providing more informative error semantics. Updated documentation to clarify that Vec::into_array now returns Err with the original Vec when the length does not match expectations. Leveraged Rust, system programming, and memory management expertise to align cross-repository behavior, resulting in more consistent APIs and a better developer experience.