error: `~const` is not allowed here
  --> $DIR/super-traits-fail-3.rs:12:12
   |
LL | trait Bar: ~const Foo {}
   |            ^^^^^^
   |
note: this trait is not a `#[const_trait]`, so it cannot have `~const` trait bounds
  --> $DIR/super-traits-fail-3.rs:12:1
   |
LL | trait Bar: ~const Foo {}
   | ^^^^^^^^^^^^^^^^^^^^^^^^

error: `~const` can only be applied to `#[const_trait]` traits
  --> $DIR/super-traits-fail-3.rs:18:24
   |
LL | const fn foo<T: ~const Bar>(x: &T) {
   |                        ^^^

error[E0308]: mismatched types
  --> $DIR/super-traits-fail-3.rs:20:5
   |
LL |     x.a();
   |     ^^^^^ expected `host`, found `true`
   |
   = note: expected constant `host`
              found constant `true`

error: aborting due to 3 previous errors

For more information about this error, try `rustc --explain E0308`.