src/test/ui/async-await/issues/issue-65419/issue-65419-generator-resume-after-completion.rs

   1 // issue 65419 - Attempting to run an `async fn` after completion mentions generators when it should
   2 // be talking about `async fn`s instead. Regression test added to make sure generators still
   3 // panic when resumed after completion.
   4
   5 // run-fail
   6 // error-pattern:generator resumed after completion
   7 // edition:2018
   8 // ignore-wasm no panic or subprocess support
   9 // ignore-emscripten no panic or subprocess support
  10
  11 #![feature(generators, generator_trait)]
  12
  13 use std::{
  14     ops::Generator,
  15     pin::Pin,
  16 };
  17
  18 fn main() {
  19     let mut g = || {
  20         yield;
  21     };
  22     Pin::new(&mut g).resume(); // Yields once.
  23     Pin::new(&mut g).resume(); // Completes here.
  24     Pin::new(&mut g).resume(); // Panics here.
  25 }