error[E0379]: functions in traits cannot be declared const
  --> $DIR/feature-gate-min_const_fn.rs:6:5
   |
LL |     const fn foo() -> u32;
   |     ^^^^^-
   |     |
   |     functions in traits cannot be const
   |     help: remove the `const`

error[E0379]: functions in traits cannot be declared const
  --> $DIR/feature-gate-min_const_fn.rs:7:5
   |
LL |     const fn bar() -> u32 { 0 }
   |     ^^^^^-
   |     |
   |     functions in traits cannot be const
   |     help: remove the `const`

error[E0379]: functions in trait impls cannot be declared const
  --> $DIR/feature-gate-min_const_fn.rs:11:5
   |
LL |     const fn foo() -> u32 { 0 }
   |     ^^^^^-
   |     |
   |     functions in trait impls cannot be const
   |     help: remove the `const`

error: aborting due to 3 previous errors

For more information about this error, try `rustc --explain E0379`.