warning: the feature `lazy_type_alias` is incomplete and may not be safe to use and/or cause compiler crashes
  --> $DIR/enum-variant.rs:4:12
   |
LL | #![feature(lazy_type_alias)]
   |            ^^^^^^^^^^^^^^^
   |
   = note: see issue #112792 <https://github.com/rust-lang/rust/issues/112792> for more information
   = note: `#[warn(incomplete_features)]` on by default

warning: 1 warning emitted