error: constant of non-structural type `Option<NoPartialEq>` in a pattern
  --> $DIR/reject_non_partial_eq.rs:28:9
   |
LL | struct NoPartialEq(u32);
   | ------------------ must be annotated with `#[derive(PartialEq)]` to be usable in patterns
...
LL | const NO_PARTIAL_EQ_NONE: Option<NoPartialEq> = None;
   | --------------------------------------------- constant defined here
...
LL |         NO_PARTIAL_EQ_NONE => println!("NO_PARTIAL_EQ_NONE"),
   |         ^^^^^^^^^^^^^^^^^^ constant of non-structural type
   |
   = note: see https://doc.rust-lang.org/stable/std/marker/trait.StructuralPartialEq.html for details

error: aborting due to 1 previous error