error: `<Foo as staged_api::MyTrait>::func` is not yet stable as a const fn
  --> $DIR/staged-api.rs:35:5
   |
LL |     Foo::func();
   |     ^^^^^^^^^^^
   |
   = help: add `#![feature(foo)]` to the crate attributes to enable

error: `<Foo as staged_api::MyTrait>::func` is not yet stable as a const fn
  --> $DIR/staged-api.rs:47:5
   |
LL |     Foo::func();
   |     ^^^^^^^^^^^
   |
   = help: add `#![feature(foo)]` to the crate attributes to enable

error: `<staged_api::Unstable as staged_api::MyTrait>::func` is not yet stable as a const fn
  --> $DIR/staged-api.rs:55:5
   |
LL |     Unstable::func();
   |     ^^^^^^^^^^^^^^^^
   |
   = help: const-stable functions can only call other const-stable functions

error: `<Foo as staged_api::MyTrait>::func` is not yet stable as a const fn
  --> $DIR/staged-api.rs:57:5
   |
LL |     Foo::func();
   |     ^^^^^^^^^^^
   |
   = help: const-stable functions can only call other const-stable functions

error: `const_context_not_const_stable` is not yet stable as a const fn
  --> $DIR/staged-api.rs:59:5
   |
LL |     const_context_not_const_stable()
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
   = help: const-stable functions can only call other const-stable functions

error: aborting due to 5 previous errors