1 error[E0658]: a #[start] function is an experimental feature whose signature may change over time (see issue #29633)
2 --> $DIR/feature-gate-start.rs:12:1
4 LL | fn foo() {} //~ ERROR: a #[start] function is an experimental feature
7 = help: add #![feature(start)] to the crate attributes to enable
9 error: aborting due to previous error
11 For more information about this error, try `rustc --explain E0658`.