| error[E0119]: conflicting implementations of trait `Foo` for type `()` |
| --> $DIR/incoherent-even-though-we-fulfill.rs:17:1 |
| | |
| LL | impl<T> Foo for T where (): Mirror<Assoc = T> {} |
| | --------------------------------------------- first implementation here |
| LL | |
| LL | impl<T> Foo for T where T: Iterator {} |
| | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ conflicting implementation for `()` |
| | |
| = note: upstream crates may add a new impl of trait `std::iter::Iterator` for type `()` in future versions |
| |
| error: aborting due to 1 previous error |
| |
| For more information about this error, try `rustc --explain E0119`. |
