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

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

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

error: aborting due to 3 previous errors

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