Error code E0708

Note: this error code is no longer emitted by the compiler.

async non-move closures with parameters are currently not supported.

Erroneous code example:

#![feature(async_closure)] fn main() { let add_one = async |num: u8| { num + 1 }; }

async with non-move is currently not supported with the current version, you can use successfully by using move:

#![feature(async_closure)] fn main() { let add_one = async move |num: u8| { // ok! num + 1 }; }