error: `impl` item signature doesn't match `trait` item signature
  --> $DIR/self-without-lifetime-constraint.rs:45:5
   |
LL |     fn column_result(value: ValueRef<'_>) -> FromSqlResult<Self, &Self>;
   |     -------------------------------------------------------------------- expected `fn(ValueRef<'_>) -> Result<(&str, &&str), FromSqlError>`
...
LL |     fn column_result(value: ValueRef<'_>) -> FromSqlResult<&str, &&str> {
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ found `fn(ValueRef<'_>) -> Result<(&str, &&str), FromSqlError>`
   |
   = note: expected `fn(ValueRef<'_>) -> Result<(&str, &&str), _>`
              found `fn(ValueRef<'_>) -> Result<(&str, &&str), _>`
help: the lifetime requirements from the `impl` do not correspond to the requirements in the `trait`
  --> $DIR/self-without-lifetime-constraint.rs:41:60
   |
LL |     fn column_result(value: ValueRef<'_>) -> FromSqlResult<Self, &Self>;
   |                                                            ^^^^ consider borrowing this type parameter in the trait

error: aborting due to previous error