error: type parameters with a default must be trailing
  --> $DIR/wrong-order.rs:3:10
   |
LL | struct A<T = u32, const N: usize> {
   |          ^
   |
   = note: using type defaults and const parameters in the same parameter list is currently not permitted

warning: the feature `const_generics` is incomplete and may not be safe to use and/or cause compiler crashes
  --> $DIR/wrong-order.rs:1:12
   |
LL | #![feature(const_generics)]
   |            ^^^^^^^^^^^^^^
   |
   = note: `#[warn(incomplete_features)]` on by default
   = note: see issue #44580 <https://github.com/rust-lang/rust/issues/44580> for more information

error: aborting due to previous error; 1 warning emitted