error: lifetime may not live long enough
  --> $DIR/ref-mut-struct.rs:12:9
   |
LL |     fn ref_Struct(self: &mut Struct, f: &u32) -> &u32 {
   |                         -               - let's call the lifetime of this reference `'1`
   |                         |
   |                         let's call the lifetime of this reference `'2`
LL |         f
   |         ^ method was supposed to return data with lifetime `'2` but it is returning data with lifetime `'1`
   |
help: consider introducing a named lifetime parameter and update trait if needed
   |
LL |     fn ref_Struct<'a>(self: &mut Struct, f: &'a u32) -> &'a u32 {
   |                  ++++                        ++          ++

error: lifetime may not live long enough
  --> $DIR/ref-mut-struct.rs:17:9
   |
LL |     fn box_ref_Struct(self: Box<&mut Struct>, f: &u32) -> &u32 {
   |                                 -                - let's call the lifetime of this reference `'1`
   |                                 |
   |                                 let's call the lifetime of this reference `'2`
LL |         f
   |         ^ method was supposed to return data with lifetime `'2` but it is returning data with lifetime `'1`
   |
help: consider introducing a named lifetime parameter and update trait if needed
   |
LL |     fn box_ref_Struct<'a>(self: Box<&mut Struct>, f: &'a u32) -> &'a u32 {
   |                      ++++                             ++          ++

error: lifetime may not live long enough
  --> $DIR/ref-mut-struct.rs:22:9
   |
LL |     fn pin_ref_Struct(self: Pin<&mut Struct>, f: &u32) -> &u32 {
   |                                 -                - let's call the lifetime of this reference `'1`
   |                                 |
   |                                 let's call the lifetime of this reference `'2`
LL |         f
   |         ^ method was supposed to return data with lifetime `'2` but it is returning data with lifetime `'1`
   |
help: consider introducing a named lifetime parameter and update trait if needed
   |
LL |     fn pin_ref_Struct<'a>(self: Pin<&mut Struct>, f: &'a u32) -> &'a u32 {
   |                      ++++                             ++          ++

error: lifetime may not live long enough
  --> $DIR/ref-mut-struct.rs:27:9
   |
LL |     fn box_box_ref_Struct(self: Box<Box<&mut Struct>>, f: &u32) -> &u32 {
   |                                         -                 - let's call the lifetime of this reference `'1`
   |                                         |
   |                                         let's call the lifetime of this reference `'2`
LL |         f
   |         ^ method was supposed to return data with lifetime `'2` but it is returning data with lifetime `'1`
   |
help: consider introducing a named lifetime parameter and update trait if needed
   |
LL |     fn box_box_ref_Struct<'a>(self: Box<Box<&mut Struct>>, f: &'a u32) -> &'a u32 {
   |                          ++++                                  ++          ++

error: lifetime may not live long enough
  --> $DIR/ref-mut-struct.rs:32:9
   |
LL |     fn box_pin_ref_Struct(self: Box<Pin<&mut Struct>>, f: &u32) -> &u32 {
   |                                         -                 - let's call the lifetime of this reference `'1`
   |                                         |
   |                                         let's call the lifetime of this reference `'2`
LL |         f
   |         ^ method was supposed to return data with lifetime `'2` but it is returning data with lifetime `'1`
   |
help: consider introducing a named lifetime parameter and update trait if needed
   |
LL |     fn box_pin_ref_Struct<'a>(self: Box<Pin<&mut Struct>>, f: &'a u32) -> &'a u32 {
   |                          ++++                                  ++          ++

error: aborting due to 5 previous errors