The nightly_crimes!{}
macro commits horrible crimes to allow you to enable
nightly features on the stable compiler.
https://twitter.com/mouse/status/1410930900116951040
Please do not use this.
```rust use nightlycrimes::nightlycrimes;
nightlycrimes! {
#![feature(nevertype)]
#![feature(boxsyntax)]
fn hey(x: Result<&str, !>) -> Box
fn main() { println!("{}", hey(Ok("success!"))); } ```
$ cargo +stable r
success!