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error[E0581]: return type references an anonymous lifetime, which is not constrained by the fn input types
--> $DIR/issue-47511.rs:8:15
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LL | fn f(_: X) -> X {
| ^
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= note: lifetimes appearing in an associated or opaque type are not considered constrained
= note: consider introducing a named lifetime parameter
error[E0581]: return type references lifetime `'a`, which is not constrained by the fn input types
--> $DIR/issue-47511.rs:12:23
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LL | fn g<'a>(_: X<'a>) -> X<'a> {
| ^^^^^
error: aborting due to 2 previous errors
For more information about this error, try `rustc --explain E0581`.
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