src/test/ui/feature-gates/feature-gate-concat_idents2.stderr

   1 error[E0658]: `concat_idents` is not stable enough for use and is subject to change (see issue #29599)
   2   --> $DIR/feature-gate-concat_idents2.rs:4:5
   3    |
   4 LL |     concat_idents!(a, b); //~ ERROR `concat_idents` is not stable enough
   5    |     ^^^^^^^^^^^^^^^^^^^^^
   6    |
   7    = help: add #![feature(concat_idents)] to the crate attributes to enable
   8
   9 error[E0425]: cannot find value `ab` in this scope
  10   --> $DIR/feature-gate-concat_idents2.rs:4:5
  11    |
  12 LL |     concat_idents!(a, b); //~ ERROR `concat_idents` is not stable enough
  13    |     ^^^^^^^^^^^^^^^^^^^^^ not found in this scope
  14
  15 error: aborting due to 2 previous errors
  16
  17 Some errors occurred: E0425, E0658.
  18 For more information about an error, try `rustc --explain E0425`.