src/test/ui/test-cfg.stderr

   1 error[E0425]: cannot find function `foo` in this scope
   2   --> $DIR/test-cfg.rs:7:5
   3    |
   4 LL |     foo();
   5    |     ^^^ not found in this scope
   6
   7 error: aborting due to previous error
   8
   9 For more information about this error, try `rustc --explain E0425`.