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error: `?` may only modify trait bounds, not lifetime bounds
--> $DIR/issue-68890-2.rs:3:15
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LL | type X<'a> = (?'a) +;
| ^
warning: trait objects without an explicit `dyn` are deprecated
--> $DIR/issue-68890-2.rs:3:14
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LL | type X<'a> = (?'a) +;
| ^^^^^^^ help: use `dyn`: `dyn (?'a) +`
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= note: `#[warn(bare_trait_objects)]` on by default
= warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
= note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
error[E0224]: at least one trait is required for an object type
--> $DIR/issue-68890-2.rs:3:14
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LL | type X<'a> = (?'a) +;
| ^^^^^^^
error: aborting due to 2 previous errors; 1 warning emitted
For more information about this error, try `rustc --explain E0224`.
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