| error: constant of non-structural type `Vec<()>` in a pattern |
| --> $DIR/implicit-const-deref.rs:15:9 |
| | |
| LL | const EMPTY: Vec<()> = Vec::new(); |
| | -------------------- constant defined here |
| ... |
| LL | EMPTY => {} |
| | ^^^^^ constant of non-structural type |
| | |
| --> $SRC_DIR/alloc/src/vec/mod.rs:LL:COL |
| | |
| = note: `Vec<()>` must be annotated with `#[derive(PartialEq)]` to be usable in patterns |
| | |
| = note: see https://doc.rust-lang.org/stable/std/marker/trait.StructuralPartialEq.html for details |
| |
| error: aborting due to 1 previous error |
| |
