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error: `impl` item signature doesn't match `trait` item signature
--> $DIR/param-without-lifetime-constraint.rs:14:5
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LL | fn get_relation(&self) -> To;
| ----------------------------- expected `fn(&'1 Article) -> &'2 ProofReader`
...
LL | fn get_relation(&self) -> &ProofReader {
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ found `fn(&'1 Article) -> &'1 ProofReader`
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= note: expected `fn(&'1 Article) -> &'2 ProofReader`
found `fn(&'1 Article) -> &'1 ProofReader`
help: the lifetime requirements from the `impl` do not correspond to the requirements in the `trait`
--> $DIR/param-without-lifetime-constraint.rs:10:31
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LL | fn get_relation(&self) -> To;
| ^^ consider borrowing this type parameter in the trait
error: aborting due to previous error
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