| error[E0658]: use of unstable library feature `feat_moo` | |
| --> $DIR/unstable-feature-cross-crate-exact-symbol.rs:16:5 | |
| | | |
| LL | Moo::foo(); | |
| | ^^^ | |
| | | |
| = help: add `#![feature(feat_moo)]` to the crate attributes to enable | |
| = note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date | |
| = note: required for `Moo` to implement `Foo` | |
| error: aborting due to 1 previous error | |
| For more information about this error, try `rustc --explain E0658`. |