I'd expect this to work, but it errors on the Vec being empty
```rust
#![no_std]

#[cfg(test)]
mod tests {

    use heapless::Vec;
    use bincode::{config, Decode, Encode};

    #[derive(Encode, Decode, PartialEq, Debug)]
    struct Entity {
        x: u32,
        y: u32,
    }

    #[test]
    fn encode_bytes() {
        let config = config::standard();
        let mut dst: Vec<u8, 256> = Default::default();
        let val = Entity { x: 1, y: 2 };

        bincode::encode_into_slice(val, &mut dst, config).unwrap();
        assert_eq!(dst.len(), 8);
    }
}
```