| warning: return type notation is experimental |
| --> $DIR/feature-gate-return_type_notation.rs:14:17 |
| | |
| LL | fn foo<T: Trait<m(): Send>>() {} |
| | ^^^^^^^^^ |
| | |
| = note: see issue #109417 <https://github.com/rust-lang/rust/issues/109417> for more information |
| = help: add `#![feature(return_type_notation)]` to the crate attributes to enable |
| = note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date |
| = warning: unstable syntax can change at any point in the future, causing a hard error! |
| = note: for more information, see issue #65860 <https://github.com/rust-lang/rust/issues/65860> |
| |
| warning: 1 warning emitted |
| |