tests/ui/missing-fmt.stderr - external/github.com/dtolnay/thiserror - Git at Google

 error: missing #[error("...")] display attribute
  --> $DIR/missing-fmt.rs:7:5
   |
 7 |     B(usize),
   |     ^^^^^^^^
	error: missing #[error("...")] display attribute
	--> $DIR/missing-fmt.rs:7:5
	\|
	7 \| B(usize),
	\| ^^^^^^^^