#![warn(rust_2018_idioms)] #![cfg(feature = "full")] struct PanicsOnDrop; impl Drop for PanicsOnDrop { fn drop(&mut self) { panic!("I told you so"); } } #[tokio::test] async fn test_panics_do_not_propagate_when_dropping_join_handle() { let join_handle = tokio::spawn(async move { PanicsOnDrop }); // only drop the JoinHandle when the task has completed // (which is difficult to synchronize precisely) tokio::time::sleep(std::time::Duration::from_millis(3)).await; drop(join_handle); }