| #[deny(single_use_lifetimes)] |
| // edition:2018 |
| // check-pass |
| |
| // Prior to the fix, the compiler complained that the 'a lifetime was only used |
| // once. This was obviously wrong since the lifetime is used twice: For the s3 |
| // parameter and the return type. The issue was caused by the compiler |
| // desugaring the async function into a coroutine that uses only a single |
| // lifetime, which then the validator complained about becauase of the |
| // single_use_lifetimes constraints. |
| async fn bar<'a>(s1: String, s2: &'_ str, s3: &'a str) -> &'a str { |
| s3 |
| } |
| |
| fn foo<'a>(s1: String, s2: &'_ str, s3: &'a str) -> &'a str { |
| s3 |
| } |
| |
| fn main() {} |