error[E0107]: struct takes 1 generic argument but 2 generic arguments were supplied --> $DIR/invalid-constant-in-args.rs:4:12 | LL | let _: Cell<&str, "a"> = Cell::new(""); | ^^^^ --- help: remove this generic argument | | | expected 1 generic argument error: aborting due to 1 previous error For more information about this error, try `rustc --explain E0107`.