error[E0308]: mismatched method receiver
  --> $DIR/issue-17905-2.rs:18:18
   |
LL |     fn say(self: &Pair<&str, isize>) {
   |                  ^^^^^^^^^^^^^^^^^^ lifetime mismatch
   |
   = note: expected type `Pair<&'_ str, _>`
              found type `Pair<&str, _>`
note: the anonymous lifetime #2 defined on the method body at 18:5...
  --> $DIR/issue-17905-2.rs:18:5
   |
LL | /     fn say(self: &Pair<&str, isize>) {
LL | | //~^ ERROR mismatched method receiver
LL | | //~| ERROR mismatched method receiver
LL | |         println!("{:?}", self);
LL | |     }
   | |_____^
note: ...does not necessarily outlive the lifetime '_ as defined on the impl at 15:5
  --> $DIR/issue-17905-2.rs:15:5
   |
LL |     &str,
   |     ^

error[E0308]: mismatched method receiver
  --> $DIR/issue-17905-2.rs:18:18
   |
LL |     fn say(self: &Pair<&str, isize>) {
   |                  ^^^^^^^^^^^^^^^^^^ lifetime mismatch
   |
   = note: expected type `Pair<&'_ str, _>`
              found type `Pair<&str, _>`
note: the lifetime '_ as defined on the impl at 15:5...
  --> $DIR/issue-17905-2.rs:15:5
   |
LL |     &str,
   |     ^
note: ...does not necessarily outlive the anonymous lifetime #2 defined on the method body at 18:5
  --> $DIR/issue-17905-2.rs:18:5
   |
LL | /     fn say(self: &Pair<&str, isize>) {
LL | | //~^ ERROR mismatched method receiver
LL | | //~| ERROR mismatched method receiver
LL | |         println!("{:?}", self);
LL | |     }
   | |_____^

error: aborting due to 2 previous errors

For more information about this error, try `rustc --explain E0308`.