error[E0700]: hidden type for `impl Iterator<Item = i32>` captures lifetime that does not appear in bounds
  --> $DIR/explicit-lifetime-suggestion-in-proper-span-issue-121267.rs:7:5
   |
LL |   fn bar(src: &crate::Foo) -> impl Iterator<Item = i32> {
   |                               ------------------------- opaque type defined here
LL | /     [0].into_iter()
LL | |
LL | |         .filter_map(|_| foo(src))
   | |_________________________________^
   |
   = note: hidden type `FilterMap<std::slice::Iter<'static, i32>, {closure@$DIR/explicit-lifetime-suggestion-in-proper-span-issue-121267.rs:9:21: 9:24}>` captures lifetime `'_`

error: aborting due to 1 previous error

For more information about this error, try `rustc --explain E0700`.