Secretly and behind the scenes more and more Rust code lives a life before main. What is life before main? It's code that executes before the rust runtime has been initialized in main. This is something that Rust does not support but because the world needs to support C++ static initializers and __attribute__((constructor)) in C, it's also possible to get Rust code to execute this way. The popular crate for this is ctor. Using it is probably not a great idea, but unfortunately there are lots ...
