tests/ui/pattern/usefulness/const-partial_eq-fallback-ice.stderr

error: to use a constant of type `MyType` in a pattern, `MyType` must be annotated with `#[derive(PartialEq, Eq)]`
  --> $DIR/const-partial_eq-fallback-ice.rs:14:12
   |
LL |     if let CONSTANT = &&MyType {
   |            ^^^^^^^^

error: aborting due to previous error