tests/ui/specialization/min_specialization/impl_specialization_trait.stderr

   1 error: implementing `rustc_specialization_trait` traits is unstable
   2   --> $DIR/impl_specialization_trait.rs:11:1
   3    |
   4 LL | impl specialization_trait::SpecTrait for A {
   5    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   6    |
   7    = help: add `#![feature(min_specialization)]` to the crate attributes to enable
   8
   9 error: aborting due to previous error
  10