tests/ui/nll/polonius/lending-iterator-sanity-checks.legacy.stderr

error[E0499]: cannot borrow `*t` as mutable more than once at a time
  --> $DIR/lending-iterator-sanity-checks.rs:19:19
   |
LL | fn use_live<T: LendingIterator>(t: &mut T) -> Option<(T::Item<'_>, T::Item<'_>)> {
   |                                    - let's call the lifetime of this reference `'1`
LL |     let Some(i) = t.next() else { return None };
   |                   - first mutable borrow occurs here
LL |     let Some(j) = t.next() else { return None };
   |                   ^ second mutable borrow occurs here
...
LL |     Some((i, j))
   |     ------------ returning this value requires that `*t` is borrowed for `'1`

error[E0499]: cannot borrow `*t` as mutable more than once at a time
  --> $DIR/lending-iterator-sanity-checks.rs:31:13
   |
LL |     let i = t.next();
   |             - first mutable borrow occurs here
...
LL |     let j = t.next();
   |             ^ second mutable borrow occurs here
LL |
LL | }
   | - first borrow might be used here, when `i` is dropped and runs the destructor for type `Option<<T as LendingIterator>::Item<'_>>`

error: aborting due to 2 previous errors

For more information about this error, try `rustc --explain E0499`.