rlua 0.19.8

High level bindings to Lua 5.x
Documentation 
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extern crate rlua;

use rlua::{Lua, UserData};

fn main() {
    // Should not allow userdata borrow to outlive lifetime of AnyUserData handle
    struct MyUserData<'a>(&'a i32);
    impl<'a> UserData for MyUserData<'a> {};

    let igood = 1;

    Lua::new().context(|lua| {
        lua.scope(|scope| {
            let ugood = scope.create_nonstatic_userdata(MyUserData(&igood)).unwrap();
            let ubad = {
                let ibad = 42;
                scope.create_nonstatic_userdata(MyUserData(&ibad)).unwrap();
                //~^ error: `ibad` does not live long enough
            };
        });
    });
}