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error: `impl` item signature doesn't match `trait` item signature
--> $DIR/lifetime-mismatch-between-trait-and-impl.rs:6:5
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LL | fn foo<'a>(x: &i32, y: &'a i32) -> &'a i32;
| ------------------------------------------- expected `fn(&'1 i32, &'a i32) -> &'a i32`
...
LL | fn foo<'a>(x: &'a i32, y: &'a i32) -> &'a i32 {
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ found `fn(&'1 i32, &'1 i32) -> &'1 i32`
|
= note: expected signature `fn(&'1 i32, &'a i32) -> &'a i32`
found signature `fn(&'1 i32, &'1 i32) -> &'1 i32`
= help: the lifetime requirements from the `impl` do not correspond to the requirements in the `trait`
= help: verify the lifetime relationships in the `trait` and `impl` between the `self` argument, the other inputs and its output
error: aborting due to 1 previous error
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