tests/ui/macros/issue-39404.rs - third_party/github.com/rust-lang/rust - Git at Google

 #![allow(unused)]

 macro_rules! m {
     ($i) => {}; //~ ERROR missing fragment specifier
 }

 fn main() {}
	#![allow(unused)]

	macro_rules! m {
	($i) => {}; //~ ERROR missing fragment specifier
	}

	fn main() {}