tests/ui/attributes/used-issue-126789.rs - toolchain/rustc - Git at Google

 extern "C" {
     #[used] //~ ERROR attribute must be applied to a `static` variable
     static FOO: i32;
 }

 fn main() {}
	extern "C" {
	#[used] //~ ERROR attribute must be applied to a `static` variable
	static FOO: i32;
	}

	fn main() {}