54 lines
1.4 KiB
Rust
54 lines
1.4 KiB
Rust
// issue 65419 - Attempting to run an async fn after completion mentions coroutines when it should
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// be talking about `async fn`s instead. Should also test what happens when it panics.
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// run-fail
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// needs-unwind
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// error-pattern: thread 'main' panicked
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// error-pattern: `async fn` resumed after panicking
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// edition:2018
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// ignore-wasm no panic or subprocess support
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#![feature(coroutines, coroutine_trait)]
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use std::panic;
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async fn foo() {
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panic!();
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}
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fn main() {
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let mut future = Box::pin(foo());
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panic::catch_unwind(panic::AssertUnwindSafe(|| {
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executor::block_on(future.as_mut());
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}));
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executor::block_on(future.as_mut());
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}
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mod executor {
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use core::{
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future::Future,
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pin::Pin,
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task::{Context, Poll, RawWaker, RawWakerVTable, Waker},
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};
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pub fn block_on<F: Future>(mut future: F) -> F::Output {
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let mut future = unsafe { Pin::new_unchecked(&mut future) };
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static VTABLE: RawWakerVTable = RawWakerVTable::new(
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|_| unimplemented!("clone"),
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|_| unimplemented!("wake"),
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|_| unimplemented!("wake_by_ref"),
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|_| (),
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);
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let waker = unsafe { Waker::from_raw(RawWaker::new(core::ptr::null(), &VTABLE)) };
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let mut context = Context::from_waker(&waker);
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loop {
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if let Poll::Ready(val) = future.as_mut().poll(&mut context) {
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break val;
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}
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}
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}
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}
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