1error[E0621]: explicit lifetime required in the type of `y` 2 --> $DIR/mismatched.rs:4:42 3 | 4LL | fn foo(x: &'a u32, y: &u32) -> &'a u32 { y } 5 | ---- ^ lifetime `'a` required 6 | | 7 | help: add explicit lifetime `'a` to the type of `y`: `&'a u32` 8 9error[E0623]: lifetime mismatch 10 --> $DIR/mismatched.rs:6:46 11 | 12LL | fn foo2(x: &'a u32, y: &'b u32) -> &'a u32 { y } 13 | ------- ------- ^ ...but data from `y` is returned here 14 | | 15 | this parameter and the return type are declared with different lifetimes... 16 17error: aborting due to 2 previous errors 18 19Some errors have detailed explanations: E0621, E0623. 20For more information about an error, try `rustc --explain E0621`. 21