error[E0204]: the trait `ConstParamTy_` cannot be implemented for this type
  --> $DIR/unsized_field-1.rs:8:10
   |
LL | #[derive(ConstParamTy, Eq, PartialEq)]
   |          ^^^^^^^^^^^^
LL |
LL | struct A([u8]);
   |          ---- this field does not implement `ConstParamTy_`
   |
note: the `ConstParamTy_` impl for `[u8]` requires that `feature(unsized_const_params) is enabled`
  --> $DIR/unsized_field-1.rs:10:10
   |
LL | struct A([u8]);
   |          ^^^^

error[E0204]: the trait `ConstParamTy_` cannot be implemented for this type
  --> $DIR/unsized_field-1.rs:12:10
   |
LL | #[derive(ConstParamTy, Eq, PartialEq)]
   |          ^^^^^^^^^^^^
LL |
LL | struct B(&'static [u8]);
   |          ------------- this field does not implement `ConstParamTy_`
   |
note: the `ConstParamTy_` impl for `&'static [u8]` requires that `feature(unsized_const_params) is enabled`
  --> $DIR/unsized_field-1.rs:14:10
   |
LL | struct B(&'static [u8]);
   |          ^^^^^^^^^^^^^

error[E0204]: the trait `ConstParamTy_` cannot be implemented for this type
  --> $DIR/unsized_field-1.rs:19:10
   |
LL | #[derive(std::marker::ConstParamTy, Eq, PartialEq)]
   |          ^^^^^^^^^^^^^^^^^^^^^^^^^
LL |
LL | struct D(unsized_const_param::GenericNotUnsizedParam<&'static [u8]>);
   |          ---------------------------------------------------------- this field does not implement `ConstParamTy_`
   |
note: the `ConstParamTy_` impl for `GenericNotUnsizedParam<&'static [u8]>` requires that `feature(unsized_const_params) is enabled`
  --> $DIR/unsized_field-1.rs:21:10
   |
LL | struct D(unsized_const_param::GenericNotUnsizedParam<&'static [u8]>);
   |          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

error: aborting due to 3 previous errors

For more information about this error, try `rustc --explain E0204`.