//#![no_std]

struct Outer<'a> {
    buffer: [u8; 20],
    inner: Inner<'a>,
}

impl<'a> Outer<'a> {
    fn test(&mut self) {
        self.inner = Inner::<'a> {
            buffer: &[1,2,3,4]
        };
    }
}

struct Inner<'a> {
    buffer: &'a [u8],
}