error: `~const` is not allowed here
  --> $DIR/super-traits-fail-2.rs:11:12
   |
LL | trait Bar: ~const Foo {}
   |            ^^^^^^
   |
note: this trait is not a `#[const_trait]`, so it cannot have `~const` trait bounds
  --> $DIR/super-traits-fail-2.rs:11:1
   |
LL | trait Bar: ~const Foo {}
   | ^^^^^^^^^^^^^^^^^^^^^^^^

error[E0277]: the trait bound `T: ~const Foo` is not satisfied
  --> $DIR/super-traits-fail-2.rs:20:5
   |
LL |     x.a();
   |     ^^^^^

error: aborting due to 2 previous errors

For more information about this error, try `rustc --explain E0277`.