tests/ui/unexpected-struct-source.rs - external/github.com/dtolnay/thiserror - Git at Google

 use thiserror::Error;

 #[derive(Error, Debug)]
 #[source]
 pub struct Error;

 fn main() {}
	use thiserror::Error;

	#[derive(Error, Debug)]
	#[source]
	pub struct Error;

	fn main() {}