error: feature `const_bar` implying `const_foobar` does not exist
  --> $DIR/const-stability-attribute-implies-missing.rs:10:1
   |
LL | #[rustc_const_unstable(feature = "const_foobar", issue = "1", implied_by = "const_bar")]
   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

error: aborting due to previous error