1 error[E0091]: type parameter `U` is unused
2 --> $DIR/generic_duplicate_param_use.rs:16:25
4 LL | existential type Two<T, U>: 'static; //~ ERROR type parameter `U` is unused
5 | ^ unused type parameter
7 error: aborting due to previous error
9 For more information about this error, try `rustc --explain E0091`.