Brief introduction to several tools in the Rust standard library that let you break the borrow checker's rules: Rc, Arc, RefCell, Mutex, RwLock, and Atomics.
Source: Rust's Rules are Made to be Broken, an article by Chuck Pierce.
Fully reproducible builds are important because they bridge the gap between auditable open source and convenient binary artifacts. Technologies like TUF and Binary Transparency provide accountability for what binaries are shipped to users, but that's of limited utility if there is no way (short of reverse engineering) of proving that the binary is in fact the result of compiling the intended source.
That's why the Debian project is putting tremendous effort into making packages reproducible. The good news is that Go builds are reproducible by default.
Source: Reproducing Go binaries byte-by-byte, an article by Filippo Valsorda.