src/test/compile-fail/issue-3099-b.rs - third_party/rust - Git at Google

 #[legacy_exports]
 mod a {}

 #[legacy_exports]
 mod a {} //~ ERROR Duplicate definition of module a

 fn main() {}
	#[legacy_exports]
	mod a {}

	#[legacy_exports]
	mod a {} //~ ERROR Duplicate definition of module a

	fn main() {}