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error: to use a constant of type `NoDerive` in a pattern, `NoDerive` must be annotated with `#[derive(PartialEq, Eq)]`
  --> $DIR/cant-hide-behind-direct-struct-param.rs:22:9
   |
LL |         WRAP_DIRECT_PARAM => { panic!("WRAP_DIRECT_PARAM matched itself"); }
   |         ^^^^^^^^^^^^^^^^^
   |
   = note: the traits must be derived, manual `impl`s are not sufficient
   = note: see https://doc.rust-lang.org/stable/std/marker/trait.StructuralEq.html for details

error: aborting due to previous error