// run-pass
+// revisions: e2015 e2018 e2021 e2024
-pub fn main() {
- println!("hello, world");
+//[e2018] edition:2018
+//[e2021] edition:2021
+//[e2024] edition:2024
+
+//[e2024] compile-flags: -Zunstable-options
+
+fn main() {
+ println!("hello");
}