1 warning: the feature `const_generics` is incomplete and may cause the compiler to crash
2 --> $DIR/forbid-non-structural_match-types.rs:1:12
4 LL | #![feature(const_generics)]
7 = note: `#[warn(incomplete_features)]` on by default
9 error[E0741]: `C` must be annotated with `#[derive(PartialEq, Eq)]` to be used as the type of a const parameter
10 --> $DIR/forbid-non-structural_match-types.rs:11:19
12 LL | struct D<const X: C>;
13 | ^ `C` doesn't derive both `PartialEq` and `Eq`
15 error: aborting due to previous error; 1 warning emitted
17 For more information about this error, try `rustc --explain E0741`.