rust/tests/ui/async-await/issues/issue-65419/issue-65419-generator-resume-after-completion.rs

// issue 65419 - Attempting to run an `async fn` after completion mentions generators when it should
// be talking about `async fn`s instead. Regression test added to make sure generators still
// panic when resumed after completion.

// run-fail
// error-pattern:generator resumed after completion
// edition:2018
// ignore-wasm no panic or subprocess support
// ignore-emscripten no panic or subprocess support

#![feature(generators, generator_trait)]

use std::{
    ops::Generator,
    pin::Pin,
};

fn main() {
    let mut g = || {
        yield;
    };
    Pin::new(&mut g).resume(()); // Yields once.
    Pin::new(&mut g).resume(()); // Completes here.
    Pin::new(&mut g).resume(()); // Panics here.
}