error[E0623]: lifetime mismatch --> $DIR/ref-mut-self.rs:11:9 | LL | fn ref_self(&mut self, f: &u32) -> &u32 { | ---- ---- | | | this parameter and the return type are declared with different lifetimes... LL | f | ^ ...but data from `f` is returned here error[E0623]: lifetime mismatch --> $DIR/ref-mut-self.rs:17:9 | LL | fn ref_Self(self: &mut Self, f: &u32) -> &u32 { | ---- ---- | | | this parameter and the return type are declared with different lifetimes... LL | f | ^ ...but data from `f` is returned here error[E0623]: lifetime mismatch --> $DIR/ref-mut-self.rs:21:9 | LL | fn box_ref_Self(self: Box<&mut Self>, f: &u32) -> &u32 { | ---- ---- | | | this parameter and the return type are declared with different lifetimes... LL | f | ^ ...but data from `f` is returned here error[E0623]: lifetime mismatch --> $DIR/ref-mut-self.rs:25:9 | LL | fn pin_ref_Self(self: Pin<&mut Self>, f: &u32) -> &u32 { | ---- ---- | | | this parameter and the return type are declared with different lifetimes... LL | f | ^ ...but data from `f` is returned here error[E0623]: lifetime mismatch --> $DIR/ref-mut-self.rs:29:9 | LL | fn box_box_ref_Self(self: Box>, f: &u32) -> &u32 { | ---- ---- | | | this parameter and the return type are declared with different lifetimes... LL | f | ^ ...but data from `f` is returned here error[E0623]: lifetime mismatch --> $DIR/ref-mut-self.rs:33:9 | LL | fn box_pin_ref_Self(self: Box>, f: &u32) -> &u32 { | ---- ---- | | | this parameter and the return type are declared with different lifetimes... LL | f | ^ ...but data from `f` is returned here error: aborting due to 6 previous errors For more information about this error, try `rustc --explain E0623`.