1 error[E0621]: explicit lifetime required in the type of `y`
2 --> $DIR/mismatched.rs:4:42
4 LL | fn foo(x: &'a u32, y: &u32) -> &'a u32 { y }
5 | ---- ^ lifetime `'a` required
7 | help: add explicit lifetime `'a` to the type of `y`: `&'a u32`
9 error[E0623]: lifetime mismatch
10 --> $DIR/mismatched.rs:6:46
12 LL | fn foo2(x: &'a u32, y: &'b u32) -> &'a u32 { y }
13 | ------- ------- ^ ...but data from `y` is returned here
15 | this parameter and the return type are declared with different lifetimes...
17 error: aborting due to 2 previous errors
19 Some errors have detailed explanations: E0621, E0623.
20 For more information about an error, try `rustc --explain E0621`.