rust/tests/ui/pattern/deref-patterns/implicit-const-deref.stderr

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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