error: type parameters must be declared prior to const parameters --> $DIR/argument_order.rs:4:28 | LL | struct Bad { | -----------------^- help: reorder the parameters: lifetimes, then types, then consts: `` warning: the feature `const_generics` is incomplete and may not be safe to use and/or cause compiler crashes --> $DIR/argument_order.rs:1:12 | LL | #![feature(const_generics)] | ^^^^^^^^^^^^^^ | = note: `#[warn(incomplete_features)]` on by default = note: see issue #44580 for more information error: aborting due to previous error; 1 warning emitted