rust/src/test/ui/async-await/issue-64130-non-send-future-diags.rs
David Wood 438455d18b
async/await: more improvements to non-send errors
Signed-off-by: David Wood <david@davidtw.co>
2019-12-08 16:29:08 +00:00

24 lines
393 B
Rust

// edition:2018
// This tests the basic example case for the async-await-specific error.
use std::sync::Mutex;
fn is_send<T: Send>(t: T) { }
async fn foo() {
bar(&Mutex::new(22)).await;
}
async fn bar(x: &Mutex<u32>) {
let g = x.lock().unwrap();
baz().await;
}
async fn baz() { }
fn main() {
is_send(foo());
//~^ ERROR future cannot be sent between threads safely
}