| error[E0658]: declaration of a nonstandard #[main] function may change over time, for now a top-level `fn main()` is required (see issue #29634) | |
| --> $DIR/feature-gate-main.rs:12:1 | |
| | | |
| LL | fn foo() {} //~ ERROR: declaration of a nonstandard #[main] function may change over time | |
| | ^^^^^^^^^^^ | |
| | | |
| = help: add #![feature(main)] to the crate attributes to enable | |
| error: aborting due to previous error | |
| For more information about this error, try `rustc --explain E0658`. |