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 | //@ aux-build:block-on.rs
//@ edition:2021
//@ build-pass
//@ revisions: v0 legacy
//@[v0] compile-flags: -Csymbol-mangling-version=v0
//@[legacy] compile-flags: -Csymbol-mangling-version=legacy -Zunstable-options
extern crate block_on;
use std::future::Future;
use std::pin::pin;
use std::task::*;
async fn call_mut(f: &mut impl AsyncFnMut()) {
    f().await;
}
async fn call_once(f: impl AsyncFnOnce()) {
    f().await;
}
fn main() {
    block_on::block_on(async {
        let mut async_closure = async move || {
            println!("called");
        };
        call_mut(&mut async_closure).await;
        call_once(async_closure).await;
    });
}
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