error: `~const` can only be applied to `#[const_trait]` traits
  --> $DIR/const-bounds-non-const-trait.rs:6:28
   |
LL | const fn perform<T: ~const NonConst>() {}
   |                            ^^^^^^^^

error: `const` can only be applied to `#[const_trait]` traits
  --> $DIR/const-bounds-non-const-trait.rs:9:21
   |
LL | fn operate<T: const NonConst>() {}
   |                     ^^^^^^^^

error: aborting due to 2 previous errors