Problem 1

TODO: Explore name mangling and the #[no_mangle] attribute

The Cherno has a video which explains the linker quite well.

Problem 2

TODO: mention exception safety and why unwinding across the FFI behaviour is a bad idea

Problem 3

TODO: Talk about why Cstring.as_ptr() is unsafe because you are passing back a dangling pointer.

Problem 4

TODO: Talk about how it's UB to create a Rust enum from an integer with an invalid variant