src/test/ui/specialization/specialization-default-methods.stderr

   1 warning: the feature `specialization` is incomplete and may not be safe to use and/or cause compiler crashes
   2   --> $DIR/specialization-default-methods.rs:3:12
   3    |
   4 LL | #![feature(specialization)]
   5    |            ^^^^^^^^^^^^^^
   6    |
   7    = note: see issue #31844 <https://github.com/rust-lang/rust/issues/31844> for more information
   8    = help: consider using `min_specialization` instead, which is more stable and complete
   9    = note: `#[warn(incomplete_features)]` on by default
  10
  11 warning: 1 warning emitted
  12