warning: the feature `effects` is incomplete and may not be safe to use and/or cause compiler crashes
  --> $DIR/missing-const-stability.rs:3:30
   |
LL | #![feature(const_trait_impl, effects, rustc_attrs, intrinsics)]
   |                              ^^^^^^^
   |
   = note: see issue #102090 <https://github.com/rust-lang/rust/issues/102090> for more information
   = note: `#[warn(incomplete_features)]` on by default

error: function has missing const stability attribute
  --> $DIR/missing-const-stability.rs:7:1
   |
LL | pub const fn foo() {}
   | ^^^^^^^^^^^^^^^^^^^^^

error: implementation has missing const stability attribute
  --> $DIR/missing-const-stability.rs:29:1
   |
LL | / impl const Bar for Foo {
LL | |
LL | |     fn fun() {}
LL | | }
   | |_^

error: function has missing const stability attribute
  --> $DIR/missing-const-stability.rs:36:1
   |
LL | pub const unsafe fn size_of_val<T>(x: *const T) -> usize { 42 }
   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

error: associated function has missing const stability attribute
  --> $DIR/missing-const-stability.rs:16:5
   |
LL |     pub const fn foo() {}
   |     ^^^^^^^^^^^^^^^^^^^^^

error: aborting due to 4 previous errors; 1 warning emitted