| error: `?` may only modify trait bounds, not lifetime bounds | |
| --> $DIR/issue-68890-2.rs:3:15 | |
| | | |
| LL | type X<'a> = (?'a) +; | |
| | ^ | |
| error[E0224]: at least one trait is required for an object type | |
| --> $DIR/issue-68890-2.rs:3:14 | |
| | | |
| LL | type X<'a> = (?'a) +; | |
| | ^^^^^^^ | |
| error: aborting due to 2 previous errors | |
| For more information about this error, try `rustc --explain E0224`. |