You can indeed use this on stable Rust today! Right now 1.9.0 is the minimum supported version due to the usage of `catch_panic` in a few places.

I'd recommend a beta compiler for now though to compile some of the examples. There's a bug in the stable compiler which causes them to take up to 8x longer to compile, but beta/nightly are both speedy!

That's so awesome. I was hoping that was the case.

Serious Kudos, it feels like a lot of the promises of Rust are really paying off here.

"promises" applause

How do futures deal with panics? - should they even?

Panics are caught at the "task" level -- and there's usually one task per connection. They don't take down the entire server (since tasks are isolation boundaries).

Right now, nothing happens with the panic after it's caught, but we want to add hooks for doing something with it. Coming soon!

I think "impl Trait" is unstable.

Not even in nightly yet - follow https://github.com/rust-lang/rust/pull/35091 for updates (we're trying to land it this week).

It is, however, it's not currently actually using that syntax in the code: http://alexcrichton.com/futures-rs/futures/trait.Future.html

So, this will work on stable. It was presented that way to not get into the whole details about the whole impl trait shenanigans in general.

Ah, great news!