| error[E0119]: conflicting implementations of trait `Foo` for type `&_` | |
| --> $DIR/coherence-overlap-negate-not-use-feature-gate.rs:5:1 | |
| | | |
| LL | impl<T: DerefMut> Foo for T {} | |
| | --------------------------- first implementation here | |
| LL | impl<U> Foo for &U {} | |
| | ^^^^^^^^^^^^^^^^^^ conflicting implementation for `&_` | |
| error: aborting due to 1 previous error | |
| For more information about this error, try `rustc --explain E0119`. |