error[E0107]: wrong number of generic arguments: expected 1, found 2
  --> $DIR/invalid-constant-in-args.rs:4:23
   |
LL |     let _: Cell<&str, "a"> = Cell::new("");
   |                       ^^^ unexpected const argument

error: aborting due to previous error

For more information about this error, try `rustc --explain E0107`.