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error[E0746]: return type cannot have an unboxed trait object
--> $DIR/issue-91801.rs:8:77
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LL | fn or<'a>(first: &'static Validator<'a>, second: &'static Validator<'a>) -> Validator<'a> {
| ^^^^^^^^^^^^^ doesn't have a size known at compile-time
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help: box the return type, and wrap all of the returned values in `Box::new`
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LL | fn or<'a>(first: &'static Validator<'a>, second: &'static Validator<'a>) -> Box<Validator<'a>> {
| ++++ +
error: aborting due to previous error
For more information about this error, try `rustc --explain E0746`.
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