src/test/ui/multiple-main-3.rs - third_party/rust - Git at Google

 #![feature(main)]

 #[main]
 fn main1() {
 }

 mod foo {
     #[main]
     fn main2() { //~ ERROR multiple functions with a `#[main]` attribute
     }
 }
	#![feature(main)]

	#[main]
	fn main1() {
	}

	mod foo {
	#[main]
	fn main2() { //~ ERROR multiple functions with a `#[main]` attribute
	}
	}