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error[E0121]: the placeholder `_` is not allowed within types on item signatures for return types
--> $DIR/return-cycle-2.rs:6:34
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LL | fn as_ref(_: i32, _: i32) -> _ {
| ^ not allowed in type signatures
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help: replace with the correct return type
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LL - fn as_ref(_: i32, _: i32) -> _ {
LL + fn as_ref(_: i32, _: i32) -> Token<&'static T> {
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error: aborting due to 1 previous error
For more information about this error, try `rustc --explain E0121`.
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