| error: constant of non-structural type `Cow<'_, str>` in a pattern |
| --> $DIR/issue-89088.rs:16:9 |
| | |
| LL | const FOO: &A = &A::Field(Cow::Borrowed("foo")); |
| | ------------- constant defined here |
| ... |
| LL | FOO => todo!(), |
| | ^^^ constant of non-structural type |
| --> $SRC_DIR/alloc/src/borrow.rs:LL:COL |
| | |
| = note: `Cow<'_, str>` 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 |
| |
